./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix052_pso.opt_rmo.opt_tso.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/mix052_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix052_pso.opt_rmo.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:14:36,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:14:36,343 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:14:36,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:14:36,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:14:36,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:14:36,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:14:36,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:14:36,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:14:36,382 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:14:36,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:14:36,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:14:36,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:14:36,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:14:36,384 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:14:36,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:14:36,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:14:36,385 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:14:36,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:14:36,385 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:14:36,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:14:36,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:14:36,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:14:36,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:14:36,387 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:14:36,387 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:14:36,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:14:36,387 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:14:36,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:14:36,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:14:36,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:14:36,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:14:36,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:14:36,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:14:36,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:14:36,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:14:36,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:14:36,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:14:36,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:14:36,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:14:36,390 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:14:36,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:14:36,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:14:36,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:14:36,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:14:36,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:14:36,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:14:36,623 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:14:36,623 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:14:36,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i [2024-06-21 21:14:37,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:14:37,920 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:14:37,920 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i [2024-06-21 21:14:37,942 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b26d6a8b/e6634c48bf31480ebd34198287ac9529/FLAG9ff840ff1 [2024-06-21 21:14:37,963 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b26d6a8b/e6634c48bf31480ebd34198287ac9529 [2024-06-21 21:14:37,965 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:14:37,966 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:14:37,966 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix052_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-21 21:14:38,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:14:38,154 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:14:38,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:14:38,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:14:38,159 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:14:38,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:14:37" (1/2) ... [2024-06-21 21:14:38,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1390ca76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:14:38, skipping insertion in model container [2024-06-21 21:14:38,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:14:37" (1/2) ... [2024-06-21 21:14:38,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@482ec2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:14:38, skipping insertion in model container [2024-06-21 21:14:38,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:38" (2/2) ... [2024-06-21 21:14:38,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1390ca76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:38, skipping insertion in model container [2024-06-21 21:14:38,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:38" (2/2) ... [2024-06-21 21:14:38,163 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:14:38,231 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:14:38,232 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 21:14:38,232 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 21:14:38,232 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 21:14:38,232 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:14:38,232 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-21 21:14:38,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:14:38,545 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:14:38,553 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:14:38,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:14:38,717 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:14:38,717 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:38 WrapperNode [2024-06-21 21:14:38,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:14:38,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:14:38,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:14:38,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:14:38,724 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,736 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,786 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 21:14:38,794 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:14:38,795 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:14:38,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:14:38,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:14:38,803 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,803 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,813 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,830 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 21:14:38,833 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,833 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,845 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,857 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,859 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,860 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:14:38,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:14:38,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:14:38,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:14:38,872 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 09:14:38" (1/1) ... [2024-06-21 21:14:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:14:38,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:14:38,895 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 21:14:38,914 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 21:14:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:14:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:14:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:14:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:14:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:14:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:14:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:14:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:14:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:14:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:14:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:14:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:14:38,932 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 21:14:39,068 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:14:39,070 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:14:39,385 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:14:39,387 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:14:39,522 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:14:39,522 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:14:39,522 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:14:39 BoogieIcfgContainer [2024-06-21 21:14:39,522 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:14:39,525 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:14:39,525 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:14:39,527 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:14:39,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:14:37" (1/4) ... [2024-06-21 21:14:39,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb49a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:14:39, skipping insertion in model container [2024-06-21 21:14:39,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:38" (2/4) ... [2024-06-21 21:14:39,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb49a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:14:39, skipping insertion in model container [2024-06-21 21:14:39,529 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 09:14:38" (3/4) ... [2024-06-21 21:14:39,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb49a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:14:39, skipping insertion in model container [2024-06-21 21:14:39,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:14:39" (4/4) ... [2024-06-21 21:14:39,531 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_pso.opt_rmo.opt_tso.opt.i [2024-06-21 21:14:39,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:14:39,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:14:39,544 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:14:39,580 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:14:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:14:39,637 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 21:14:39,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:14:39,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:14:39,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:14:39,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 21:14:39,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:14:39,662 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;@29da42bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:14:39,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:14:39,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:14:39,669 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:14:39,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:14:39,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:39,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:14:39,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:39,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash 355559444, now seen corresponding path program 1 times [2024-06-21 21:14:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883360441] [2024-06-21 21:14:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:39,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:40,542 INFO 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 21:14:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:40,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883360441] [2024-06-21 21:14:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883360441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:40,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:40,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:14:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325655629] [2024-06-21 21:14:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:40,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:14:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:14:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:14:40,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 21:14:40,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 21:14:40,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:40,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 21:14:40,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:40,938 INFO L124 PetriNetUnfolderBase]: 946/1511 cut-off events. [2024-06-21 21:14:40,938 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 21:14:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3017 conditions, 1511 events. 946/1511 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7369 event pairs, 638 based on Foata normal form. 1/1463 useless extension candidates. Maximal degree in co-relation 3005. Up to 1431 conditions per place. [2024-06-21 21:14:40,952 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 21:14:40,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 165 flow [2024-06-21 21:14:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:14:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:14:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-21 21:14:40,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 21:14:40,963 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 76 transitions. [2024-06-21 21:14:40,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 165 flow [2024-06-21 21:14:40,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:40,968 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 21:14:40,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 21:14:40,972 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 21:14:40,972 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 21:14:40,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 21:14:40,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:40,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:40,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:14:40,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:40,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1904726733, now seen corresponding path program 1 times [2024-06-21 21:14:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:40,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244152515] [2024-06-21 21:14:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:40,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:41,466 INFO 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 21:14:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:41,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244152515] [2024-06-21 21:14:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244152515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:41,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:41,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:14:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289927603] [2024-06-21 21:14:41,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:14:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:14:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:14:41,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 21:14:41,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:14:41,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:41,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 21:14:41,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:41,692 INFO L124 PetriNetUnfolderBase]: 1110/1712 cut-off events. [2024-06-21 21:14:41,692 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-21 21:14:41,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3933 conditions, 1712 events. 1110/1712 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8133 event pairs, 641 based on Foata normal form. 3/1709 useless extension candidates. Maximal degree in co-relation 3921. Up to 1652 conditions per place. [2024-06-21 21:14:41,701 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-21 21:14:41,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 234 flow [2024-06-21 21:14:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:14:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:14:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 21:14:41,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 21:14:41,703 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 96 transitions. [2024-06-21 21:14:41,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 234 flow [2024-06-21 21:14:41,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:14:41,704 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-21 21:14:41,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 21:14:41,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-21 21:14:41,705 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-21 21:14:41,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:14:41,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:41,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:41,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:14:41,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:41,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1083014459, now seen corresponding path program 1 times [2024-06-21 21:14:41,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:41,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860263658] [2024-06-21 21:14:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860263658] [2024-06-21 21:14:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860263658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:42,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:14:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114272017] [2024-06-21 21:14:42,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:14:42,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:42,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:14:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:14:42,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 21:14:42,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 21:14:42,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:42,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 21:14:42,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:42,528 INFO L124 PetriNetUnfolderBase]: 1132/1763 cut-off events. [2024-06-21 21:14:42,529 INFO L125 PetriNetUnfolderBase]: For 989/989 co-relation queries the response was YES. [2024-06-21 21:14:42,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4495 conditions, 1763 events. 1132/1763 cut-off events. For 989/989 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8483 event pairs, 401 based on Foata normal form. 7/1767 useless extension candidates. Maximal degree in co-relation 4481. Up to 1555 conditions per place. [2024-06-21 21:14:42,539 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 21:14:42,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 76 transitions, 400 flow [2024-06-21 21:14:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 21:14:42,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 21:14:42,545 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 129 transitions. [2024-06-21 21:14:42,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 76 transitions, 400 flow [2024-06-21 21:14:42,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:14:42,549 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-21 21:14:42,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-21 21:14:42,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-21 21:14:42,550 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-21 21:14:42,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 21:14:42,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:42,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:14:42,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:42,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1393059768, now seen corresponding path program 1 times [2024-06-21 21:14:42,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:42,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244609578] [2024-06-21 21:14:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244609578] [2024-06-21 21:14:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244609578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:43,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:43,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:14:43,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881727183] [2024-06-21 21:14:43,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:43,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:14:43,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:14:43,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:14:43,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 21:14:43,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:43,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:43,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 21:14:43,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:43,604 INFO L124 PetriNetUnfolderBase]: 1214/1909 cut-off events. [2024-06-21 21:14:43,604 INFO L125 PetriNetUnfolderBase]: For 2570/2570 co-relation queries the response was YES. [2024-06-21 21:14:43,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5813 conditions, 1909 events. 1214/1909 cut-off events. For 2570/2570 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9493 event pairs, 273 based on Foata normal form. 26/1932 useless extension candidates. Maximal degree in co-relation 5796. Up to 1519 conditions per place. [2024-06-21 21:14:43,616 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-21 21:14:43,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 86 transitions, 517 flow [2024-06-21 21:14:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 21:14:43,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 21:14:43,618 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 151 transitions. [2024-06-21 21:14:43,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 86 transitions, 517 flow [2024-06-21 21:14:43,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 509 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 21:14:43,621 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 281 flow [2024-06-21 21:14:43,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-21 21:14:43,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-21 21:14:43,622 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 281 flow [2024-06-21 21:14:43,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:43,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:43,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:14:43,623 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:43,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 842700762, now seen corresponding path program 1 times [2024-06-21 21:14:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:43,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564481111] [2024-06-21 21:14:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:44,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:44,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564481111] [2024-06-21 21:14:44,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564481111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:44,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:44,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:14:44,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502473957] [2024-06-21 21:14:44,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:44,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:14:44,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:14:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:14:44,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:14:44,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:14:44,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:44,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:14:44,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:44,463 INFO L124 PetriNetUnfolderBase]: 1034/1714 cut-off events. [2024-06-21 21:14:44,463 INFO L125 PetriNetUnfolderBase]: For 3193/3193 co-relation queries the response was YES. [2024-06-21 21:14:44,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5552 conditions, 1714 events. 1034/1714 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8866 event pairs, 374 based on Foata normal form. 4/1717 useless extension candidates. Maximal degree in co-relation 5531. Up to 1569 conditions per place. [2024-06-21 21:14:44,474 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 21:14:44,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 421 flow [2024-06-21 21:14:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 21:14:44,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-21 21:14:44,476 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 281 flow. Second operand 5 states and 99 transitions. [2024-06-21 21:14:44,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 421 flow [2024-06-21 21:14:44,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 377 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:44,480 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 261 flow [2024-06-21 21:14:44,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-21 21:14:44,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-21 21:14:44,481 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 261 flow [2024-06-21 21:14:44,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:14:44,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:44,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:14:44,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:44,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1946005207, now seen corresponding path program 1 times [2024-06-21 21:14:44,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:44,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512091700] [2024-06-21 21:14:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:44,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512091700] [2024-06-21 21:14:45,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512091700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:45,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:45,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:45,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237944509] [2024-06-21 21:14:45,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:45,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:45,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:45,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:45,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:45,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:45,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:45,487 INFO L124 PetriNetUnfolderBase]: 1216/1913 cut-off events. [2024-06-21 21:14:45,487 INFO L125 PetriNetUnfolderBase]: For 4160/4160 co-relation queries the response was YES. [2024-06-21 21:14:45,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 1913 events. 1216/1913 cut-off events. For 4160/4160 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9475 event pairs, 392 based on Foata normal form. 8/1919 useless extension candidates. Maximal degree in co-relation 6225. Up to 1698 conditions per place. [2024-06-21 21:14:45,498 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 51 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-06-21 21:14:45,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 499 flow [2024-06-21 21:14:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 21:14:45,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 21:14:45,499 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 261 flow. Second operand 6 states and 123 transitions. [2024-06-21 21:14:45,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 499 flow [2024-06-21 21:14:45,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 477 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:45,503 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 311 flow [2024-06-21 21:14:45,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=311, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 21:14:45,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 21:14:45,504 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 311 flow [2024-06-21 21:14:45,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:45,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:45,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:45,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:14:45,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:45,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1913364039, now seen corresponding path program 2 times [2024-06-21 21:14:45,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:45,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127931116] [2024-06-21 21:14:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:45,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:45,964 INFO 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 21:14:45,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:45,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127931116] [2024-06-21 21:14:45,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127931116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:45,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:45,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:45,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786033020] [2024-06-21 21:14:45,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:45,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:45,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:46,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:46,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:46,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:46,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:46,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:46,451 INFO L124 PetriNetUnfolderBase]: 1184/1842 cut-off events. [2024-06-21 21:14:46,451 INFO L125 PetriNetUnfolderBase]: For 5084/5088 co-relation queries the response was YES. [2024-06-21 21:14:46,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 1842 events. 1184/1842 cut-off events. For 5084/5088 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8908 event pairs, 402 based on Foata normal form. 5/1843 useless extension candidates. Maximal degree in co-relation 6275. Up to 1650 conditions per place. [2024-06-21 21:14:46,462 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 45 selfloop transitions, 20 changer transitions 0/70 dead transitions. [2024-06-21 21:14:46,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 485 flow [2024-06-21 21:14:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 21:14:46,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-21 21:14:46,464 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 311 flow. Second operand 6 states and 119 transitions. [2024-06-21 21:14:46,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 485 flow [2024-06-21 21:14:46,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 456 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:46,468 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 330 flow [2024-06-21 21:14:46,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-06-21 21:14:46,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-21 21:14:46,469 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 330 flow [2024-06-21 21:14:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:46,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:46,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:14:46,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:46,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash 372213887, now seen corresponding path program 1 times [2024-06-21 21:14:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:46,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009765318] [2024-06-21 21:14:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:47,279 INFO 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 21:14:47,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:47,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009765318] [2024-06-21 21:14:47,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009765318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:47,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:47,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:47,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841332891] [2024-06-21 21:14:47,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:47,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:47,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:47,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:14:47,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:47,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:47,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:14:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:47,763 INFO L124 PetriNetUnfolderBase]: 1006/1650 cut-off events. [2024-06-21 21:14:47,764 INFO L125 PetriNetUnfolderBase]: For 5040/5040 co-relation queries the response was YES. [2024-06-21 21:14:47,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 1650 events. 1006/1650 cut-off events. For 5040/5040 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8276 event pairs, 336 based on Foata normal form. 4/1653 useless extension candidates. Maximal degree in co-relation 5644. Up to 1497 conditions per place. [2024-06-21 21:14:47,781 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-21 21:14:47,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 559 flow [2024-06-21 21:14:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 21:14:47,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 21:14:47,784 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 330 flow. Second operand 7 states and 134 transitions. [2024-06-21 21:14:47,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 559 flow [2024-06-21 21:14:47,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 489 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:14:47,791 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 340 flow [2024-06-21 21:14:47,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 21:14:47,793 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-21 21:14:47,794 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 340 flow [2024-06-21 21:14:47,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:47,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:47,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:47,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:14:47,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:47,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash -99673232, now seen corresponding path program 1 times [2024-06-21 21:14:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:47,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882357879] [2024-06-21 21:14:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:47,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:48,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:48,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882357879] [2024-06-21 21:14:48,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882357879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:48,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:48,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:48,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438779238] [2024-06-21 21:14:48,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:48,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:48,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:14:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 340 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 21:14:48,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:14:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:48,685 INFO L124 PetriNetUnfolderBase]: 1003/1646 cut-off events. [2024-06-21 21:14:48,685 INFO L125 PetriNetUnfolderBase]: For 5721/5721 co-relation queries the response was YES. [2024-06-21 21:14:48,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5861 conditions, 1646 events. 1003/1646 cut-off events. For 5721/5721 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8268 event pairs, 347 based on Foata normal form. 1/1646 useless extension candidates. Maximal degree in co-relation 5835. Up to 1526 conditions per place. [2024-06-21 21:14:48,693 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-21 21:14:48,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 504 flow [2024-06-21 21:14:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 21:14:48,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-21 21:14:48,694 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 340 flow. Second operand 5 states and 94 transitions. [2024-06-21 21:14:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 504 flow [2024-06-21 21:14:48,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 471 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:48,699 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 355 flow [2024-06-21 21:14:48,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 21:14:48,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-21 21:14:48,700 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 355 flow [2024-06-21 21:14:48,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 21:14:48,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:48,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:48,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:14:48,701 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:48,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:48,701 INFO L85 PathProgramCache]: Analyzing trace with hash -144824154, now seen corresponding path program 1 times [2024-06-21 21:14:48,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:48,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557991738] [2024-06-21 21:14:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:48,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:49,286 INFO 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 21:14:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557991738] [2024-06-21 21:14:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557991738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:49,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:49,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457608623] [2024-06-21 21:14:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:49,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:49,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 355 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:49,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:49,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:49,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:49,798 INFO L124 PetriNetUnfolderBase]: 1314/2075 cut-off events. [2024-06-21 21:14:49,798 INFO L125 PetriNetUnfolderBase]: For 10131/10131 co-relation queries the response was YES. [2024-06-21 21:14:49,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7868 conditions, 2075 events. 1314/2075 cut-off events. For 10131/10131 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10448 event pairs, 284 based on Foata normal form. 16/2089 useless extension candidates. Maximal degree in co-relation 7841. Up to 1419 conditions per place. [2024-06-21 21:14:49,807 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 70 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-21 21:14:49,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 695 flow [2024-06-21 21:14:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 21:14:49,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-21 21:14:49,809 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 355 flow. Second operand 7 states and 145 transitions. [2024-06-21 21:14:49,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 695 flow [2024-06-21 21:14:49,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 669 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:49,817 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 405 flow [2024-06-21 21:14:49,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=405, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-21 21:14:49,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-21 21:14:49,821 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 405 flow [2024-06-21 21:14:49,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:49,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:49,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:14:49,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:49,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -141967194, now seen corresponding path program 2 times [2024-06-21 21:14:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450820499] [2024-06-21 21:14:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:49,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:50,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:50,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450820499] [2024-06-21 21:14:50,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450820499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:50,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:50,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261765852] [2024-06-21 21:14:50,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:50,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:50,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:50,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:50,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 405 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:50,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:50,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:50,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:50,970 INFO L124 PetriNetUnfolderBase]: 1356/2154 cut-off events. [2024-06-21 21:14:50,970 INFO L125 PetriNetUnfolderBase]: For 12306/12306 co-relation queries the response was YES. [2024-06-21 21:14:50,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8391 conditions, 2154 events. 1356/2154 cut-off events. For 12306/12306 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11012 event pairs, 418 based on Foata normal form. 24/2176 useless extension candidates. Maximal degree in co-relation 8363. Up to 1806 conditions per place. [2024-06-21 21:14:50,984 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 21:14:50,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 681 flow [2024-06-21 21:14:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 21:14:50,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-21 21:14:50,986 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 405 flow. Second operand 7 states and 142 transitions. [2024-06-21 21:14:50,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 681 flow [2024-06-21 21:14:50,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 651 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:50,999 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 453 flow [2024-06-21 21:14:50,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-21 21:14:50,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-21 21:14:51,000 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 453 flow [2024-06-21 21:14:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:51,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:51,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:51,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:14:51,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:51,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2083842937, now seen corresponding path program 1 times [2024-06-21 21:14:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905914247] [2024-06-21 21:14:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:51,622 INFO 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 21:14:51,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905914247] [2024-06-21 21:14:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905914247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:51,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656911887] [2024-06-21 21:14:51,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:51,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:51,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:51,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 453 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 21:14:51,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:51,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:51,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:52,044 INFO L124 PetriNetUnfolderBase]: 1361/2166 cut-off events. [2024-06-21 21:14:52,044 INFO L125 PetriNetUnfolderBase]: For 12889/12889 co-relation queries the response was YES. [2024-06-21 21:14:52,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8813 conditions, 2166 events. 1361/2166 cut-off events. For 12889/12889 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11027 event pairs, 473 based on Foata normal form. 1/2166 useless extension candidates. Maximal degree in co-relation 8783. Up to 2073 conditions per place. [2024-06-21 21:14:52,061 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-21 21:14:52,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 667 flow [2024-06-21 21:14:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:14:52,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:14:52,063 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 453 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:14:52,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 667 flow [2024-06-21 21:14:52,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 613 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:52,083 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 455 flow [2024-06-21 21:14:52,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2024-06-21 21:14:52,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 21:14:52,084 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 455 flow [2024-06-21 21:14:52,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 21:14:52,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:52,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:52,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:14:52,085 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:52,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1595536336, now seen corresponding path program 1 times [2024-06-21 21:14:52,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:52,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605462668] [2024-06-21 21:14:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:52,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:52,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:52,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605462668] [2024-06-21 21:14:52,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605462668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:52,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:52,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:14:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666888829] [2024-06-21 21:14:52,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:52,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:14:52,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:52,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:14:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:14:53,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:53,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 455 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:14:53,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:53,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:53,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:53,557 INFO L124 PetriNetUnfolderBase]: 1389/2207 cut-off events. [2024-06-21 21:14:53,557 INFO L125 PetriNetUnfolderBase]: For 14784/14788 co-relation queries the response was YES. [2024-06-21 21:14:53,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9195 conditions, 2207 events. 1389/2207 cut-off events. For 14784/14788 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11308 event pairs, 440 based on Foata normal form. 5/2208 useless extension candidates. Maximal degree in co-relation 9164. Up to 1967 conditions per place. [2024-06-21 21:14:53,570 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 33 changer transitions 0/103 dead transitions. [2024-06-21 21:14:53,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 803 flow [2024-06-21 21:14:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:14:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:14:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:14:53,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 21:14:53,572 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 455 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:14:53,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 803 flow [2024-06-21 21:14:53,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 769 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:53,585 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 599 flow [2024-06-21 21:14:53,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=599, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-21 21:14:53,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-21 21:14:53,586 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 599 flow [2024-06-21 21:14:53,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:14:53,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:53,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:53,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:14:53,588 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:53,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1365320416, now seen corresponding path program 2 times [2024-06-21 21:14:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:53,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308220514] [2024-06-21 21:14:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:54,386 INFO 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 21:14:54,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:54,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308220514] [2024-06-21 21:14:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308220514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:54,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:54,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:14:54,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081206726] [2024-06-21 21:14:54,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:54,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:14:54,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:14:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:14:54,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:54,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 599 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:14:54,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:54,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:54,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:54,974 INFO L124 PetriNetUnfolderBase]: 1422/2276 cut-off events. [2024-06-21 21:14:54,974 INFO L125 PetriNetUnfolderBase]: For 17303/17307 co-relation queries the response was YES. [2024-06-21 21:14:54,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9867 conditions, 2276 events. 1422/2276 cut-off events. For 17303/17307 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11856 event pairs, 357 based on Foata normal form. 5/2277 useless extension candidates. Maximal degree in co-relation 9834. Up to 1851 conditions per place. [2024-06-21 21:14:54,988 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 40 changer transitions 0/114 dead transitions. [2024-06-21 21:14:54,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 1011 flow [2024-06-21 21:14:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:14:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:14:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 21:14:54,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-21 21:14:54,989 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 599 flow. Second operand 8 states and 159 transitions. [2024-06-21 21:14:54,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 1011 flow [2024-06-21 21:14:55,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 951 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:55,006 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 713 flow [2024-06-21 21:14:55,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=713, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-06-21 21:14:55,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-21 21:14:55,008 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 713 flow [2024-06-21 21:14:55,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:14:55,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:55,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:55,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:14:55,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:55,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash 978810432, now seen corresponding path program 3 times [2024-06-21 21:14:55,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:55,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513879814] [2024-06-21 21:14:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:55,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513879814] [2024-06-21 21:14:55,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513879814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:55,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:14:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401584576] [2024-06-21 21:14:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:14:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:14:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:14:55,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:55,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 713 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:14:55,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:55,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:55,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:56,384 INFO L124 PetriNetUnfolderBase]: 1414/2264 cut-off events. [2024-06-21 21:14:56,385 INFO L125 PetriNetUnfolderBase]: For 19482/19486 co-relation queries the response was YES. [2024-06-21 21:14:56,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10059 conditions, 2264 events. 1414/2264 cut-off events. For 19482/19486 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11716 event pairs, 447 based on Foata normal form. 5/2265 useless extension candidates. Maximal degree in co-relation 10024. Up to 2014 conditions per place. [2024-06-21 21:14:56,399 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 71 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2024-06-21 21:14:56,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 109 transitions, 994 flow [2024-06-21 21:14:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:14:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:14:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:14:56,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 21:14:56,401 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 713 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:14:56,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 109 transitions, 994 flow [2024-06-21 21:14:56,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 109 transitions, 894 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:56,431 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 705 flow [2024-06-21 21:14:56,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2024-06-21 21:14:56,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-21 21:14:56,432 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 705 flow [2024-06-21 21:14:56,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:14:56,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:56,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:56,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:14:56,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:56,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:56,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2072415097, now seen corresponding path program 2 times [2024-06-21 21:14:56,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:56,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813669971] [2024-06-21 21:14:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:56,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:57,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813669971] [2024-06-21 21:14:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813669971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:57,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:57,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815843620] [2024-06-21 21:14:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:57,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:57,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:14:57,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 705 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 21:14:57,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:57,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:14:57,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:57,399 INFO L124 PetriNetUnfolderBase]: 1411/2269 cut-off events. [2024-06-21 21:14:57,399 INFO L125 PetriNetUnfolderBase]: For 20705/20707 co-relation queries the response was YES. [2024-06-21 21:14:57,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 2269 events. 1411/2269 cut-off events. For 20705/20707 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11763 event pairs, 426 based on Foata normal form. 3/2271 useless extension candidates. Maximal degree in co-relation 10018. Up to 2153 conditions per place. [2024-06-21 21:14:57,411 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 18 changer transitions 0/101 dead transitions. [2024-06-21 21:14:57,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 101 transitions, 974 flow [2024-06-21 21:14:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:14:57,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 21:14:57,413 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 705 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:14:57,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 101 transitions, 974 flow [2024-06-21 21:14:57,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 101 transitions, 899 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:57,433 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 745 flow [2024-06-21 21:14:57,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=745, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-06-21 21:14:57,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 21:14:57,434 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 745 flow [2024-06-21 21:14:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 21:14:57,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:57,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:57,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:14:57,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:57,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1525868455, now seen corresponding path program 1 times [2024-06-21 21:14:57,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:57,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423449352] [2024-06-21 21:14:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:57,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:58,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:58,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423449352] [2024-06-21 21:14:58,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423449352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:58,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:58,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:58,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782367885] [2024-06-21 21:14:58,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:58,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:58,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:14:58,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 745 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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 21:14:58,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:58,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:14:58,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:58,530 INFO L124 PetriNetUnfolderBase]: 1338/2202 cut-off events. [2024-06-21 21:14:58,530 INFO L125 PetriNetUnfolderBase]: For 23995/23995 co-relation queries the response was YES. [2024-06-21 21:14:58,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10039 conditions, 2202 events. 1338/2202 cut-off events. For 23995/23995 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11692 event pairs, 396 based on Foata normal form. 3/2202 useless extension candidates. Maximal degree in co-relation 9999. Up to 2018 conditions per place. [2024-06-21 21:14:58,540 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 88 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-06-21 21:14:58,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 108 transitions, 998 flow [2024-06-21 21:14:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:14:58,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 21:14:58,542 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 745 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:14:58,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 108 transitions, 998 flow [2024-06-21 21:14:58,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 972 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 21:14:58,559 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 771 flow [2024-06-21 21:14:58,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=771, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2024-06-21 21:14:58,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-21 21:14:58,560 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 771 flow [2024-06-21 21:14:58,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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 21:14:58,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:58,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:14:58,561 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:58,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2072409145, now seen corresponding path program 2 times [2024-06-21 21:14:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:58,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251365191] [2024-06-21 21:14:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:59,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:59,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251365191] [2024-06-21 21:14:59,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251365191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:59,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:59,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:59,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036959798] [2024-06-21 21:14:59,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:59,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:59,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:59,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:59,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:14:59,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 771 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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 21:14:59,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:59,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:14:59,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:59,552 INFO L124 PetriNetUnfolderBase]: 1337/2204 cut-off events. [2024-06-21 21:14:59,553 INFO L125 PetriNetUnfolderBase]: For 26131/26133 co-relation queries the response was YES. [2024-06-21 21:14:59,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10407 conditions, 2204 events. 1337/2204 cut-off events. For 26131/26133 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11744 event pairs, 399 based on Foata normal form. 5/2206 useless extension candidates. Maximal degree in co-relation 10364. Up to 2007 conditions per place. [2024-06-21 21:14:59,567 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 82 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-21 21:14:59,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 1028 flow [2024-06-21 21:14:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:14:59,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 21:14:59,569 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 771 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:14:59,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 1028 flow [2024-06-21 21:14:59,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 998 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:59,591 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 814 flow [2024-06-21 21:14:59,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=814, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-06-21 21:14:59,592 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 21:14:59,592 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 814 flow [2024-06-21 21:14:59,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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 21:14:59,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:59,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:14:59,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:59,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2072401209, now seen corresponding path program 1 times [2024-06-21 21:14:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796468994] [2024-06-21 21:14:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:00,509 INFO 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 21:15:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:00,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796468994] [2024-06-21 21:15:00,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796468994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:00,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:00,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:00,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973332200] [2024-06-21 21:15:00,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:00,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:00,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:00,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:00,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 814 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:00,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:00,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:00,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:00,926 INFO L124 PetriNetUnfolderBase]: 1432/2301 cut-off events. [2024-06-21 21:15:00,927 INFO L125 PetriNetUnfolderBase]: For 27890/27890 co-relation queries the response was YES. [2024-06-21 21:15:00,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 2301 events. 1432/2301 cut-off events. For 27890/27890 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11962 event pairs, 426 based on Foata normal form. 1/2301 useless extension candidates. Maximal degree in co-relation 11116. Up to 2198 conditions per place. [2024-06-21 21:15:00,943 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 92 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-21 21:15:00,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 111 transitions, 1085 flow [2024-06-21 21:15:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:15:00,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 21:15:00,946 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 814 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:15:00,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 111 transitions, 1085 flow [2024-06-21 21:15:00,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 1036 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:00,975 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 837 flow [2024-06-21 21:15:00,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-06-21 21:15:00,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 21:15:00,976 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 837 flow [2024-06-21 21:15:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:00,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:00,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:00,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:15:00,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:00,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash -821230338, now seen corresponding path program 1 times [2024-06-21 21:15:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384849571] [2024-06-21 21:15:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:01,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:01,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384849571] [2024-06-21 21:15:01,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384849571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:01,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:01,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:01,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870038003] [2024-06-21 21:15:01,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:01,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:01,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:01,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:01,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:01,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:01,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:01,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:01,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:02,370 INFO L124 PetriNetUnfolderBase]: 1542/2511 cut-off events. [2024-06-21 21:15:02,370 INFO L125 PetriNetUnfolderBase]: For 32264/32264 co-relation queries the response was YES. [2024-06-21 21:15:02,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12099 conditions, 2511 events. 1542/2511 cut-off events. For 32264/32264 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13617 event pairs, 445 based on Foata normal form. 12/2521 useless extension candidates. Maximal degree in co-relation 12054. Up to 1940 conditions per place. [2024-06-21 21:15:02,385 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 35 changer transitions 0/140 dead transitions. [2024-06-21 21:15:02,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1259 flow [2024-06-21 21:15:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 21:15:02,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-21 21:15:02,387 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 837 flow. Second operand 8 states and 158 transitions. [2024-06-21 21:15:02,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1259 flow [2024-06-21 21:15:02,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1189 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:02,415 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 932 flow [2024-06-21 21:15:02,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=932, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-06-21 21:15:02,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 21:15:02,416 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 932 flow [2024-06-21 21:15:02,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:02,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:02,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:15:02,416 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:02,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1553648935, now seen corresponding path program 1 times [2024-06-21 21:15:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:02,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959858856] [2024-06-21 21:15:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:02,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:03,023 INFO 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 21:15:03,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:03,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959858856] [2024-06-21 21:15:03,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959858856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:03,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:03,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650024524] [2024-06-21 21:15:03,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:03,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:03,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:03,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 932 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:03,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:03,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:03,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:03,455 INFO L124 PetriNetUnfolderBase]: 1557/2539 cut-off events. [2024-06-21 21:15:03,456 INFO L125 PetriNetUnfolderBase]: For 34870/34872 co-relation queries the response was YES. [2024-06-21 21:15:03,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12758 conditions, 2539 events. 1557/2539 cut-off events. For 34870/34872 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13824 event pairs, 457 based on Foata normal form. 5/2543 useless extension candidates. Maximal degree in co-relation 12711. Up to 2324 conditions per place. [2024-06-21 21:15:03,473 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 25 changer transitions 0/135 dead transitions. [2024-06-21 21:15:03,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 1315 flow [2024-06-21 21:15:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 21:15:03,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 21:15:03,475 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 932 flow. Second operand 7 states and 136 transitions. [2024-06-21 21:15:03,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 1315 flow [2024-06-21 21:15:03,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 135 transitions, 1262 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:03,512 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 1014 flow [2024-06-21 21:15:03,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1014, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2024-06-21 21:15:03,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-21 21:15:03,513 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 1014 flow [2024-06-21 21:15:03,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:03,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:03,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:03,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:15:03,513 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:03,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash -728375719, now seen corresponding path program 2 times [2024-06-21 21:15:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:03,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200770820] [2024-06-21 21:15:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:03,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200770820] [2024-06-21 21:15:04,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200770820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:04,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:04,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123225051] [2024-06-21 21:15:04,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:04,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:04,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:04,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 1014 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:04,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:04,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:04,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:04,656 INFO L124 PetriNetUnfolderBase]: 1608/2624 cut-off events. [2024-06-21 21:15:04,657 INFO L125 PetriNetUnfolderBase]: For 38662/38664 co-relation queries the response was YES. [2024-06-21 21:15:04,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13666 conditions, 2624 events. 1608/2624 cut-off events. For 38662/38664 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14416 event pairs, 458 based on Foata normal form. 5/2628 useless extension candidates. Maximal degree in co-relation 13618. Up to 2352 conditions per place. [2024-06-21 21:15:04,673 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 106 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2024-06-21 21:15:04,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1467 flow [2024-06-21 21:15:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 21:15:04,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 21:15:04,674 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 1014 flow. Second operand 7 states and 133 transitions. [2024-06-21 21:15:04,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1467 flow [2024-06-21 21:15:04,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1413 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:04,707 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 1132 flow [2024-06-21 21:15:04,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1132, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2024-06-21 21:15:04,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 21:15:04,707 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 1132 flow [2024-06-21 21:15:04,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:04,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:04,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:04,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:15:04,708 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:04,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1390249251, now seen corresponding path program 1 times [2024-06-21 21:15:04,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:04,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93656624] [2024-06-21 21:15:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:04,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:05,309 INFO 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 21:15:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93656624] [2024-06-21 21:15:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93656624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:05,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:05,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746086205] [2024-06-21 21:15:05,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:05,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:05,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:05,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:05,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 1132 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:05,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:05,797 INFO L124 PetriNetUnfolderBase]: 1613/2630 cut-off events. [2024-06-21 21:15:05,798 INFO L125 PetriNetUnfolderBase]: For 42455/42455 co-relation queries the response was YES. [2024-06-21 21:15:05,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14427 conditions, 2630 events. 1613/2630 cut-off events. For 42455/42455 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14380 event pairs, 458 based on Foata normal form. 1/2630 useless extension candidates. Maximal degree in co-relation 14377. Up to 2470 conditions per place. [2024-06-21 21:15:05,813 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 119 selfloop transitions, 15 changer transitions 0/139 dead transitions. [2024-06-21 21:15:05,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 139 transitions, 1487 flow [2024-06-21 21:15:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:15:05,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:15:05,814 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 1132 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:15:05,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 139 transitions, 1487 flow [2024-06-21 21:15:05,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 139 transitions, 1426 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:05,854 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 1159 flow [2024-06-21 21:15:05,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1159, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-06-21 21:15:05,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 21:15:05,855 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 1159 flow [2024-06-21 21:15:05,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:05,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:05,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:05,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:15:05,855 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:05,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash 385746822, now seen corresponding path program 2 times [2024-06-21 21:15:05,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:05,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291122975] [2024-06-21 21:15:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:05,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:06,713 INFO 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 21:15:06,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:06,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291122975] [2024-06-21 21:15:06,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291122975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:06,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:06,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:06,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925829750] [2024-06-21 21:15:06,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:06,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:06,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:06,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:06,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:06,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:06,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:07,346 INFO L124 PetriNetUnfolderBase]: 1593/2598 cut-off events. [2024-06-21 21:15:07,346 INFO L125 PetriNetUnfolderBase]: For 45298/45298 co-relation queries the response was YES. [2024-06-21 21:15:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14357 conditions, 2598 events. 1593/2598 cut-off events. For 45298/45298 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14149 event pairs, 279 based on Foata normal form. 12/2608 useless extension candidates. Maximal degree in co-relation 14305. Up to 1591 conditions per place. [2024-06-21 21:15:07,364 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 40 changer transitions 0/154 dead transitions. [2024-06-21 21:15:07,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1560 flow [2024-06-21 21:15:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 21:15:07,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-21 21:15:07,366 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 1159 flow. Second operand 7 states and 142 transitions. [2024-06-21 21:15:07,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1560 flow [2024-06-21 21:15:07,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 154 transitions, 1488 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:07,434 INFO L231 Difference]: Finished difference. Result has 120 places, 124 transitions, 1176 flow [2024-06-21 21:15:07,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1176, PETRI_PLACES=120, PETRI_TRANSITIONS=124} [2024-06-21 21:15:07,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 21:15:07,435 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 124 transitions, 1176 flow [2024-06-21 21:15:07,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:07,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:07,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:15:07,436 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:07,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1950610494, now seen corresponding path program 3 times [2024-06-21 21:15:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591902115] [2024-06-21 21:15:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:08,187 INFO 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 21:15:08,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:08,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591902115] [2024-06-21 21:15:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591902115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:08,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:08,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046167971] [2024-06-21 21:15:08,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:08,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:08,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 124 transitions, 1176 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:08,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:08,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:08,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:08,705 INFO L124 PetriNetUnfolderBase]: 1573/2568 cut-off events. [2024-06-21 21:15:08,705 INFO L125 PetriNetUnfolderBase]: For 46980/46980 co-relation queries the response was YES. [2024-06-21 21:15:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14321 conditions, 2568 events. 1573/2568 cut-off events. For 46980/46980 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13991 event pairs, 261 based on Foata normal form. 12/2578 useless extension candidates. Maximal degree in co-relation 14268. Up to 1449 conditions per place. [2024-06-21 21:15:08,721 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 39 changer transitions 0/148 dead transitions. [2024-06-21 21:15:08,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 148 transitions, 1516 flow [2024-06-21 21:15:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 21:15:08,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 21:15:08,723 INFO L175 Difference]: Start difference. First operand has 120 places, 124 transitions, 1176 flow. Second operand 7 states and 134 transitions. [2024-06-21 21:15:08,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 148 transitions, 1516 flow [2024-06-21 21:15:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 148 transitions, 1412 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:08,763 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 1122 flow [2024-06-21 21:15:08,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1122, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2024-06-21 21:15:08,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 21:15:08,764 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 1122 flow [2024-06-21 21:15:08,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:08,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:08,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:08,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:15:08,765 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:08,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash 179642681, now seen corresponding path program 3 times [2024-06-21 21:15:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:08,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850274880] [2024-06-21 21:15:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:09,369 INFO 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 21:15:09,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850274880] [2024-06-21 21:15:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850274880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:09,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:09,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:09,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59405644] [2024-06-21 21:15:09,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:09,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:09,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:09,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:09,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 1122 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:09,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:09,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:09,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:09,795 INFO L124 PetriNetUnfolderBase]: 1600/2615 cut-off events. [2024-06-21 21:15:09,795 INFO L125 PetriNetUnfolderBase]: For 45079/45081 co-relation queries the response was YES. [2024-06-21 21:15:09,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14486 conditions, 2615 events. 1600/2615 cut-off events. For 45079/45081 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14384 event pairs, 459 based on Foata normal form. 5/2619 useless extension candidates. Maximal degree in co-relation 14432. Up to 2275 conditions per place. [2024-06-21 21:15:09,813 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-21 21:15:09,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 151 transitions, 1686 flow [2024-06-21 21:15:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:15:09,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 21:15:09,815 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 1122 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:15:09,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 151 transitions, 1686 flow [2024-06-21 21:15:09,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 151 transitions, 1575 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:09,851 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 1280 flow [2024-06-21 21:15:09,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1280, PETRI_PLACES=123, PETRI_TRANSITIONS=136} [2024-06-21 21:15:09,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-21 21:15:09,852 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 1280 flow [2024-06-21 21:15:09,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:09,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:09,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:09,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:15:09,854 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:09,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1400426241, now seen corresponding path program 2 times [2024-06-21 21:15:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:09,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692767402] [2024-06-21 21:15:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:10,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:10,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692767402] [2024-06-21 21:15:10,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692767402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:10,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:10,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:10,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046833346] [2024-06-21 21:15:10,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:10,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:10,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:10,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 1280 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:10,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:10,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:10,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:10,967 INFO L124 PetriNetUnfolderBase]: 1605/2619 cut-off events. [2024-06-21 21:15:10,967 INFO L125 PetriNetUnfolderBase]: For 49108/49112 co-relation queries the response was YES. [2024-06-21 21:15:10,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14977 conditions, 2619 events. 1605/2619 cut-off events. For 49108/49112 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14304 event pairs, 443 based on Foata normal form. 5/2623 useless extension candidates. Maximal degree in co-relation 14921. Up to 2435 conditions per place. [2024-06-21 21:15:10,986 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 120 selfloop transitions, 27 changer transitions 0/152 dead transitions. [2024-06-21 21:15:10,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 152 transitions, 1760 flow [2024-06-21 21:15:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:15:10,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:15:10,987 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 1280 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:15:10,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 152 transitions, 1760 flow [2024-06-21 21:15:11,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 152 transitions, 1677 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 21:15:11,035 INFO L231 Difference]: Finished difference. Result has 128 places, 142 transitions, 1375 flow [2024-06-21 21:15:11,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1375, PETRI_PLACES=128, PETRI_TRANSITIONS=142} [2024-06-21 21:15:11,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 21:15:11,036 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 142 transitions, 1375 flow [2024-06-21 21:15:11,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:11,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:11,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:11,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:15:11,036 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1541258173, now seen corresponding path program 3 times [2024-06-21 21:15:11,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:11,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921131219] [2024-06-21 21:15:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:11,708 INFO 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 21:15:11,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:11,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921131219] [2024-06-21 21:15:11,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921131219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:11,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:11,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419554728] [2024-06-21 21:15:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:11,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:11,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 1375 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:11,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:11,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:11,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:12,170 INFO L124 PetriNetUnfolderBase]: 1602/2611 cut-off events. [2024-06-21 21:15:12,171 INFO L125 PetriNetUnfolderBase]: For 50963/50963 co-relation queries the response was YES. [2024-06-21 21:15:12,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14786 conditions, 2611 events. 1602/2611 cut-off events. For 50963/50963 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14215 event pairs, 438 based on Foata normal form. 1/2611 useless extension candidates. Maximal degree in co-relation 14728. Up to 2459 conditions per place. [2024-06-21 21:15:12,189 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 133 selfloop transitions, 14 changer transitions 0/152 dead transitions. [2024-06-21 21:15:12,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 152 transitions, 1696 flow [2024-06-21 21:15:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:15:12,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 21:15:12,190 INFO L175 Difference]: Start difference. First operand has 128 places, 142 transitions, 1375 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:15:12,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 152 transitions, 1696 flow [2024-06-21 21:15:12,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 152 transitions, 1581 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:12,247 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 1294 flow [2024-06-21 21:15:12,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1294, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2024-06-21 21:15:12,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-21 21:15:12,248 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 1294 flow [2024-06-21 21:15:12,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:12,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:12,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:12,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:15:12,249 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:12,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2575889, now seen corresponding path program 1 times [2024-06-21 21:15:12,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:12,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133708095] [2024-06-21 21:15:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:12,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:12,798 INFO 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 21:15:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133708095] [2024-06-21 21:15:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133708095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:12,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458868202] [2024-06-21 21:15:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:12,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:12,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:15:12,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 1294 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 21:15:12,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:12,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:15:12,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:13,253 INFO L124 PetriNetUnfolderBase]: 1537/2544 cut-off events. [2024-06-21 21:15:13,253 INFO L125 PetriNetUnfolderBase]: For 54952/54960 co-relation queries the response was YES. [2024-06-21 21:15:13,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14512 conditions, 2544 events. 1537/2544 cut-off events. For 54952/54960 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14130 event pairs, 408 based on Foata normal form. 2/2531 useless extension candidates. Maximal degree in co-relation 14452. Up to 2274 conditions per place. [2024-06-21 21:15:13,271 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 14 changer transitions 0/161 dead transitions. [2024-06-21 21:15:13,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 161 transitions, 1669 flow [2024-06-21 21:15:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:15:13,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:15:13,273 INFO L175 Difference]: Start difference. First operand has 132 places, 142 transitions, 1294 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:15:13,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 161 transitions, 1669 flow [2024-06-21 21:15:13,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 161 transitions, 1631 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:13,326 INFO L231 Difference]: Finished difference. Result has 133 places, 145 transitions, 1336 flow [2024-06-21 21:15:13,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1336, PETRI_PLACES=133, PETRI_TRANSITIONS=145} [2024-06-21 21:15:13,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 21:15:13,327 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 145 transitions, 1336 flow [2024-06-21 21:15:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 21:15:13,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:13,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:13,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:15:13,328 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:13,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1541243293, now seen corresponding path program 1 times [2024-06-21 21:15:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:13,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049927670] [2024-06-21 21:15:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:14,273 INFO 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 21:15:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:14,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049927670] [2024-06-21 21:15:14,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049927670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:14,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:14,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:14,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26336857] [2024-06-21 21:15:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:14,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:14,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:14,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 145 transitions, 1336 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:14,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:14,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:14,774 INFO L124 PetriNetUnfolderBase]: 1591/2598 cut-off events. [2024-06-21 21:15:14,774 INFO L125 PetriNetUnfolderBase]: For 57133/57133 co-relation queries the response was YES. [2024-06-21 21:15:14,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15016 conditions, 2598 events. 1591/2598 cut-off events. For 57133/57133 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14164 event pairs, 433 based on Foata normal form. 2/2599 useless extension candidates. Maximal degree in co-relation 14955. Up to 2438 conditions per place. [2024-06-21 21:15:14,792 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 138 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2024-06-21 21:15:14,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 159 transitions, 1721 flow [2024-06-21 21:15:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:15:14,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 21:15:14,793 INFO L175 Difference]: Start difference. First operand has 133 places, 145 transitions, 1336 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:15:14,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 159 transitions, 1721 flow [2024-06-21 21:15:14,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 159 transitions, 1667 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:14,852 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1369 flow [2024-06-21 21:15:14,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1369, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-06-21 21:15:14,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-21 21:15:14,853 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1369 flow [2024-06-21 21:15:14,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:14,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:14,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:15:14,854 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:14,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 967711164, now seen corresponding path program 1 times [2024-06-21 21:15:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:14,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119493458] [2024-06-21 21:15:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:15,420 INFO 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 21:15:15,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:15,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119493458] [2024-06-21 21:15:15,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119493458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:15,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:15,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:15,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674764202] [2024-06-21 21:15:15,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:15,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:15,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:15,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1369 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:15,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:15,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:15,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:15,909 INFO L124 PetriNetUnfolderBase]: 1611/2631 cut-off events. [2024-06-21 21:15:15,910 INFO L125 PetriNetUnfolderBase]: For 61474/61476 co-relation queries the response was YES. [2024-06-21 21:15:15,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15388 conditions, 2631 events. 1611/2631 cut-off events. For 61474/61476 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14370 event pairs, 433 based on Foata normal form. 6/2636 useless extension candidates. Maximal degree in co-relation 15326. Up to 2389 conditions per place. [2024-06-21 21:15:15,929 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-21 21:15:15,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 171 transitions, 1814 flow [2024-06-21 21:15:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:15:15,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 21:15:15,931 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1369 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:15:15,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 171 transitions, 1814 flow [2024-06-21 21:15:16,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 171 transitions, 1743 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:16,002 INFO L231 Difference]: Finished difference. Result has 137 places, 151 transitions, 1413 flow [2024-06-21 21:15:16,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1413, PETRI_PLACES=137, PETRI_TRANSITIONS=151} [2024-06-21 21:15:16,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 21:15:16,003 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 151 transitions, 1413 flow [2024-06-21 21:15:16,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:16,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:16,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:16,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:15:16,004 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:16,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1118258586, now seen corresponding path program 2 times [2024-06-21 21:15:16,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:16,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193422550] [2024-06-21 21:15:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:16,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193422550] [2024-06-21 21:15:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193422550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:16,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:16,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:16,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868742400] [2024-06-21 21:15:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:16,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:16,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:16,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:16,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 151 transitions, 1413 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:16,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:16,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:16,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:16,958 INFO L124 PetriNetUnfolderBase]: 1615/2639 cut-off events. [2024-06-21 21:15:16,958 INFO L125 PetriNetUnfolderBase]: For 64013/64015 co-relation queries the response was YES. [2024-06-21 21:15:16,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15542 conditions, 2639 events. 1615/2639 cut-off events. For 64013/64015 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14420 event pairs, 434 based on Foata normal form. 6/2644 useless extension candidates. Maximal degree in co-relation 15479. Up to 2338 conditions per place. [2024-06-21 21:15:16,978 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-21 21:15:16,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 1918 flow [2024-06-21 21:15:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:15:16,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 21:15:16,982 INFO L175 Difference]: Start difference. First operand has 137 places, 151 transitions, 1413 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:15:16,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 1918 flow [2024-06-21 21:15:17,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 173 transitions, 1860 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:17,038 INFO L231 Difference]: Finished difference. Result has 140 places, 154 transitions, 1486 flow [2024-06-21 21:15:17,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1486, PETRI_PLACES=140, PETRI_TRANSITIONS=154} [2024-06-21 21:15:17,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 21:15:17,039 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 154 transitions, 1486 flow [2024-06-21 21:15:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:17,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:17,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:17,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:15:17,040 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash -61384517, now seen corresponding path program 1 times [2024-06-21 21:15:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:17,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839422259] [2024-06-21 21:15:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:17,731 INFO 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 21:15:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839422259] [2024-06-21 21:15:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839422259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:17,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:17,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691394954] [2024-06-21 21:15:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:17,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:17,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:17,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:17,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 154 transitions, 1486 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:17,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:17,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:17,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:18,271 INFO L124 PetriNetUnfolderBase]: 1630/2660 cut-off events. [2024-06-21 21:15:18,271 INFO L125 PetriNetUnfolderBase]: For 67621/67623 co-relation queries the response was YES. [2024-06-21 21:15:18,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15814 conditions, 2660 events. 1630/2660 cut-off events. For 67621/67623 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14566 event pairs, 433 based on Foata normal form. 5/2664 useless extension candidates. Maximal degree in co-relation 15751. Up to 2408 conditions per place. [2024-06-21 21:15:18,294 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 148 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-21 21:15:18,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 182 transitions, 1979 flow [2024-06-21 21:15:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:15:18,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:15:18,297 INFO L175 Difference]: Start difference. First operand has 140 places, 154 transitions, 1486 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:15:18,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 182 transitions, 1979 flow [2024-06-21 21:15:18,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 182 transitions, 1904 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:18,355 INFO L231 Difference]: Finished difference. Result has 144 places, 158 transitions, 1550 flow [2024-06-21 21:15:18,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1550, PETRI_PLACES=144, PETRI_TRANSITIONS=158} [2024-06-21 21:15:18,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 21:15:18,356 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 158 transitions, 1550 flow [2024-06-21 21:15:18,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:18,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:18,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:18,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:15:18,357 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 148043909, now seen corresponding path program 2 times [2024-06-21 21:15:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515507857] [2024-06-21 21:15:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:19,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515507857] [2024-06-21 21:15:19,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515507857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:19,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:19,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017022133] [2024-06-21 21:15:19,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:19,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:19,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 1550 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:19,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:19,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:19,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:19,533 INFO L124 PetriNetUnfolderBase]: 1705/2776 cut-off events. [2024-06-21 21:15:19,534 INFO L125 PetriNetUnfolderBase]: For 76447/76449 co-relation queries the response was YES. [2024-06-21 21:15:19,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17203 conditions, 2776 events. 1705/2776 cut-off events. For 76447/76449 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15317 event pairs, 437 based on Foata normal form. 5/2780 useless extension candidates. Maximal degree in co-relation 17139. Up to 2373 conditions per place. [2024-06-21 21:15:19,554 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 139 selfloop transitions, 48 changer transitions 0/192 dead transitions. [2024-06-21 21:15:19,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 192 transitions, 2333 flow [2024-06-21 21:15:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:15:19,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:15:19,556 INFO L175 Difference]: Start difference. First operand has 144 places, 158 transitions, 1550 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:15:19,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 192 transitions, 2333 flow [2024-06-21 21:15:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 192 transitions, 2222 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:19,630 INFO L231 Difference]: Finished difference. Result has 147 places, 170 transitions, 1791 flow [2024-06-21 21:15:19,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=147, PETRI_TRANSITIONS=170} [2024-06-21 21:15:19,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-21 21:15:19,631 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 170 transitions, 1791 flow [2024-06-21 21:15:19,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:19,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:19,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:15:19,632 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:19,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 148055472, now seen corresponding path program 1 times [2024-06-21 21:15:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:19,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186537239] [2024-06-21 21:15:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:20,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:20,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186537239] [2024-06-21 21:15:20,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186537239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:20,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:20,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:20,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354943927] [2024-06-21 21:15:20,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:20,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:20,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:20,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:20,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:20,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 170 transitions, 1791 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:20,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:20,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:20,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:20,881 INFO L124 PetriNetUnfolderBase]: 1710/2780 cut-off events. [2024-06-21 21:15:20,881 INFO L125 PetriNetUnfolderBase]: For 82560/82560 co-relation queries the response was YES. [2024-06-21 21:15:20,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17950 conditions, 2780 events. 1710/2780 cut-off events. For 82560/82560 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15307 event pairs, 445 based on Foata normal form. 1/2780 useless extension candidates. Maximal degree in co-relation 17884. Up to 2595 conditions per place. [2024-06-21 21:15:20,901 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 166 selfloop transitions, 18 changer transitions 0/189 dead transitions. [2024-06-21 21:15:20,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 189 transitions, 2264 flow [2024-06-21 21:15:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:15:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 21:15:20,902 INFO L175 Difference]: Start difference. First operand has 147 places, 170 transitions, 1791 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:15:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 189 transitions, 2264 flow [2024-06-21 21:15:21,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 189 transitions, 2159 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:21,021 INFO L231 Difference]: Finished difference. Result has 152 places, 173 transitions, 1796 flow [2024-06-21 21:15:21,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1796, PETRI_PLACES=152, PETRI_TRANSITIONS=173} [2024-06-21 21:15:21,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 21:15:21,022 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 173 transitions, 1796 flow [2024-06-21 21:15:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:21,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:21,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:15:21,023 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:21,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash 148055069, now seen corresponding path program 3 times [2024-06-21 21:15:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:21,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674314503] [2024-06-21 21:15:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674314503] [2024-06-21 21:15:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674314503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:21,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659199893] [2024-06-21 21:15:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:21,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:21,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:21,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 173 transitions, 1796 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:21,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:21,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:21,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:22,379 INFO L124 PetriNetUnfolderBase]: 1705/2777 cut-off events. [2024-06-21 21:15:22,380 INFO L125 PetriNetUnfolderBase]: For 84611/84613 co-relation queries the response was YES. [2024-06-21 21:15:22,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17914 conditions, 2777 events. 1705/2777 cut-off events. For 84611/84613 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15344 event pairs, 431 based on Foata normal form. 5/2781 useless extension candidates. Maximal degree in co-relation 17846. Up to 2378 conditions per place. [2024-06-21 21:15:22,401 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 143 selfloop transitions, 47 changer transitions 0/195 dead transitions. [2024-06-21 21:15:22,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 195 transitions, 2381 flow [2024-06-21 21:15:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:15:22,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 21:15:22,403 INFO L175 Difference]: Start difference. First operand has 152 places, 173 transitions, 1796 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:15:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 195 transitions, 2381 flow [2024-06-21 21:15:22,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 2243 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:22,493 INFO L231 Difference]: Finished difference. Result has 154 places, 173 transitions, 1760 flow [2024-06-21 21:15:22,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1760, PETRI_PLACES=154, PETRI_TRANSITIONS=173} [2024-06-21 21:15:22,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 21:15:22,494 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 173 transitions, 1760 flow [2024-06-21 21:15:22,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:22,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:22,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:15:22,495 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:22,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:22,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1271146896, now seen corresponding path program 3 times [2024-06-21 21:15:22,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:22,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546929934] [2024-06-21 21:15:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:22,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:23,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546929934] [2024-06-21 21:15:23,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546929934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:23,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:23,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:23,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752573985] [2024-06-21 21:15:23,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:23,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:23,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:23,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 173 transitions, 1760 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:23,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:23,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:23,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:23,705 INFO L124 PetriNetUnfolderBase]: 1750/2843 cut-off events. [2024-06-21 21:15:23,705 INFO L125 PetriNetUnfolderBase]: For 89835/89835 co-relation queries the response was YES. [2024-06-21 21:15:23,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18651 conditions, 2843 events. 1750/2843 cut-off events. For 89835/89835 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15648 event pairs, 424 based on Foata normal form. 2/2843 useless extension candidates. Maximal degree in co-relation 18582. Up to 2569 conditions per place. [2024-06-21 21:15:23,727 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 164 selfloop transitions, 39 changer transitions 0/208 dead transitions. [2024-06-21 21:15:23,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 208 transitions, 2521 flow [2024-06-21 21:15:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:15:23,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 21:15:23,728 INFO L175 Difference]: Start difference. First operand has 154 places, 173 transitions, 1760 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:15:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 208 transitions, 2521 flow [2024-06-21 21:15:23,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 208 transitions, 2371 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:23,839 INFO L231 Difference]: Finished difference. Result has 159 places, 192 transitions, 2034 flow [2024-06-21 21:15:23,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2034, PETRI_PLACES=159, PETRI_TRANSITIONS=192} [2024-06-21 21:15:23,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 21:15:23,839 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 192 transitions, 2034 flow [2024-06-21 21:15:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:23,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:23,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:15:23,840 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:23,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash 72137318, now seen corresponding path program 4 times [2024-06-21 21:15:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:23,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759179827] [2024-06-21 21:15:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:24,354 INFO 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 21:15:24,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759179827] [2024-06-21 21:15:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759179827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:24,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200281307] [2024-06-21 21:15:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:24,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:24,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:24,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 192 transitions, 2034 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:24,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:24,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:24,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:24,990 INFO L124 PetriNetUnfolderBase]: 1736/2821 cut-off events. [2024-06-21 21:15:24,991 INFO L125 PetriNetUnfolderBase]: For 92402/92402 co-relation queries the response was YES. [2024-06-21 21:15:25,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18547 conditions, 2821 events. 1736/2821 cut-off events. For 92402/92402 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15513 event pairs, 427 based on Foata normal form. 2/2821 useless extension candidates. Maximal degree in co-relation 18475. Up to 2541 conditions per place. [2024-06-21 21:15:25,015 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 162 selfloop transitions, 40 changer transitions 0/207 dead transitions. [2024-06-21 21:15:25,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 207 transitions, 2486 flow [2024-06-21 21:15:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:15:25,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:15:25,016 INFO L175 Difference]: Start difference. First operand has 159 places, 192 transitions, 2034 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:15:25,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 207 transitions, 2486 flow [2024-06-21 21:15:25,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 207 transitions, 2391 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:25,130 INFO L231 Difference]: Finished difference. Result has 163 places, 192 transitions, 2030 flow [2024-06-21 21:15:25,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2030, PETRI_PLACES=163, PETRI_TRANSITIONS=192} [2024-06-21 21:15:25,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-21 21:15:25,131 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 192 transitions, 2030 flow [2024-06-21 21:15:25,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:25,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:25,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:25,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:15:25,131 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:25,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1080373192, now seen corresponding path program 5 times [2024-06-21 21:15:25,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:25,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962108536] [2024-06-21 21:15:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:25,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:25,679 INFO 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 21:15:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962108536] [2024-06-21 21:15:25,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962108536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:25,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:25,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983164049] [2024-06-21 21:15:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:25,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:25,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:25,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 192 transitions, 2030 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:25,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:25,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:25,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:26,253 INFO L124 PetriNetUnfolderBase]: 1746/2843 cut-off events. [2024-06-21 21:15:26,253 INFO L125 PetriNetUnfolderBase]: For 97019/97019 co-relation queries the response was YES. [2024-06-21 21:15:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18755 conditions, 2843 events. 1746/2843 cut-off events. For 97019/97019 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15766 event pairs, 417 based on Foata normal form. 2/2843 useless extension candidates. Maximal degree in co-relation 18681. Up to 2523 conditions per place. [2024-06-21 21:15:26,276 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 48 changer transitions 0/209 dead transitions. [2024-06-21 21:15:26,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 209 transitions, 2533 flow [2024-06-21 21:15:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:15:26,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:15:26,278 INFO L175 Difference]: Start difference. First operand has 163 places, 192 transitions, 2030 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:15:26,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 209 transitions, 2533 flow [2024-06-21 21:15:26,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2344 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:15:26,383 INFO L231 Difference]: Finished difference. Result has 162 places, 196 transitions, 2024 flow [2024-06-21 21:15:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2024, PETRI_PLACES=162, PETRI_TRANSITIONS=196} [2024-06-21 21:15:26,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 21:15:26,384 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 196 transitions, 2024 flow [2024-06-21 21:15:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:15:26,384 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:26,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1273961062, now seen corresponding path program 6 times [2024-06-21 21:15:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623862223] [2024-06-21 21:15:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:27,052 INFO 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 21:15:27,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:27,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623862223] [2024-06-21 21:15:27,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623862223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:27,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:27,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530785869] [2024-06-21 21:15:27,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:27,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:27,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:27,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:27,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 196 transitions, 2024 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:27,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:27,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:27,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:27,568 INFO L124 PetriNetUnfolderBase]: 1750/2856 cut-off events. [2024-06-21 21:15:27,568 INFO L125 PetriNetUnfolderBase]: For 96754/96756 co-relation queries the response was YES. [2024-06-21 21:15:27,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18750 conditions, 2856 events. 1750/2856 cut-off events. For 96754/96756 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15849 event pairs, 424 based on Foata normal form. 6/2861 useless extension candidates. Maximal degree in co-relation 18674. Up to 2423 conditions per place. [2024-06-21 21:15:27,589 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 144 selfloop transitions, 63 changer transitions 0/212 dead transitions. [2024-06-21 21:15:27,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 212 transitions, 2602 flow [2024-06-21 21:15:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:15:27,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:15:27,590 INFO L175 Difference]: Start difference. First operand has 162 places, 196 transitions, 2024 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:15:27,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 212 transitions, 2602 flow [2024-06-21 21:15:27,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 212 transitions, 2500 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:27,713 INFO L231 Difference]: Finished difference. Result has 165 places, 199 transitions, 2104 flow [2024-06-21 21:15:27,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2104, PETRI_PLACES=165, PETRI_TRANSITIONS=199} [2024-06-21 21:15:27,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 21:15:27,714 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 199 transitions, 2104 flow [2024-06-21 21:15:27,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:27,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:27,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:27,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:15:27,715 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:27,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1631808806, now seen corresponding path program 7 times [2024-06-21 21:15:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:27,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031113141] [2024-06-21 21:15:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:27,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:28,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:28,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031113141] [2024-06-21 21:15:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031113141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:28,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846772136] [2024-06-21 21:15:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:28,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:28,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:28,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:28,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 199 transitions, 2104 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:28,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:28,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:28,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:28,952 INFO L124 PetriNetUnfolderBase]: 1740/2840 cut-off events. [2024-06-21 21:15:28,952 INFO L125 PetriNetUnfolderBase]: For 98589/98591 co-relation queries the response was YES. [2024-06-21 21:15:28,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18760 conditions, 2840 events. 1740/2840 cut-off events. For 98589/98591 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15800 event pairs, 427 based on Foata normal form. 4/2843 useless extension candidates. Maximal degree in co-relation 18683. Up to 2415 conditions per place. [2024-06-21 21:15:28,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 139 selfloop transitions, 67 changer transitions 0/211 dead transitions. [2024-06-21 21:15:28,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2558 flow [2024-06-21 21:15:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:15:28,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:15:28,975 INFO L175 Difference]: Start difference. First operand has 165 places, 199 transitions, 2104 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:15:28,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2558 flow [2024-06-21 21:15:29,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 2400 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:29,091 INFO L231 Difference]: Finished difference. Result has 168 places, 199 transitions, 2086 flow [2024-06-21 21:15:29,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2086, PETRI_PLACES=168, PETRI_TRANSITIONS=199} [2024-06-21 21:15:29,092 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 21:15:29,092 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 199 transitions, 2086 flow [2024-06-21 21:15:29,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:29,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:29,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:29,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:15:29,093 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:29,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:29,093 INFO L85 PathProgramCache]: Analyzing trace with hash -547248466, now seen corresponding path program 2 times [2024-06-21 21:15:29,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:29,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267385919] [2024-06-21 21:15:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:29,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:29,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267385919] [2024-06-21 21:15:29,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267385919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:29,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:29,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:29,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168628997] [2024-06-21 21:15:29,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:29,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:29,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:29,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:29,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 199 transitions, 2086 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:29,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:29,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:29,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:30,426 INFO L124 PetriNetUnfolderBase]: 1745/2833 cut-off events. [2024-06-21 21:15:30,426 INFO L125 PetriNetUnfolderBase]: For 101519/101523 co-relation queries the response was YES. [2024-06-21 21:15:30,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18860 conditions, 2833 events. 1745/2833 cut-off events. For 101519/101523 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15555 event pairs, 421 based on Foata normal form. 5/2837 useless extension candidates. Maximal degree in co-relation 18782. Up to 2631 conditions per place. [2024-06-21 21:15:30,449 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 177 selfloop transitions, 30 changer transitions 0/212 dead transitions. [2024-06-21 21:15:30,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 212 transitions, 2592 flow [2024-06-21 21:15:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:15:30,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 21:15:30,450 INFO L175 Difference]: Start difference. First operand has 168 places, 199 transitions, 2086 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:15:30,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 212 transitions, 2592 flow [2024-06-21 21:15:30,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 212 transitions, 2396 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:15:30,582 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 2028 flow [2024-06-21 21:15:30,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2028, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2024-06-21 21:15:30,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 21:15:30,582 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 2028 flow [2024-06-21 21:15:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:30,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:30,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:30,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:15:30,586 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:30,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1257786337, now seen corresponding path program 4 times [2024-06-21 21:15:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:30,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903893811] [2024-06-21 21:15:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:31,230 INFO 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 21:15:31,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:31,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903893811] [2024-06-21 21:15:31,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903893811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:31,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:31,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:31,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389071530] [2024-06-21 21:15:31,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:31,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:31,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:31,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 2028 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:31,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:31,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:31,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:31,802 INFO L124 PetriNetUnfolderBase]: 1792/2907 cut-off events. [2024-06-21 21:15:31,802 INFO L125 PetriNetUnfolderBase]: For 112331/112333 co-relation queries the response was YES. [2024-06-21 21:15:31,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19544 conditions, 2907 events. 1792/2907 cut-off events. For 112331/112333 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16090 event pairs, 431 based on Foata normal form. 5/2911 useless extension candidates. Maximal degree in co-relation 19467. Up to 2298 conditions per place. [2024-06-21 21:15:31,828 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 138 selfloop transitions, 88 changer transitions 0/231 dead transitions. [2024-06-21 21:15:31,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 231 transitions, 3022 flow [2024-06-21 21:15:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:15:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:15:31,830 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 2028 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:15:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 231 transitions, 3022 flow [2024-06-21 21:15:31,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 231 transitions, 2906 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:31,957 INFO L231 Difference]: Finished difference. Result has 171 places, 214 transitions, 2376 flow [2024-06-21 21:15:31,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2376, PETRI_PLACES=171, PETRI_TRANSITIONS=214} [2024-06-21 21:15:31,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 21:15:31,958 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 214 transitions, 2376 flow [2024-06-21 21:15:31,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:31,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:31,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:15:31,958 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:31,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash -534361456, now seen corresponding path program 3 times [2024-06-21 21:15:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:31,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929926757] [2024-06-21 21:15:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929926757] [2024-06-21 21:15:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929926757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:32,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:32,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583835072] [2024-06-21 21:15:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:32,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:32,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 214 transitions, 2376 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:32,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:32,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:32,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:33,514 INFO L124 PetriNetUnfolderBase]: 1797/2913 cut-off events. [2024-06-21 21:15:33,514 INFO L125 PetriNetUnfolderBase]: For 119012/119012 co-relation queries the response was YES. [2024-06-21 21:15:33,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20465 conditions, 2913 events. 1797/2913 cut-off events. For 119012/119012 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16115 event pairs, 424 based on Foata normal form. 1/2913 useless extension candidates. Maximal degree in co-relation 20386. Up to 2730 conditions per place. [2024-06-21 21:15:33,540 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 206 selfloop transitions, 17 changer transitions 0/228 dead transitions. [2024-06-21 21:15:33,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 228 transitions, 2932 flow [2024-06-21 21:15:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:15:33,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 21:15:33,542 INFO L175 Difference]: Start difference. First operand has 171 places, 214 transitions, 2376 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:15:33,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 228 transitions, 2932 flow [2024-06-21 21:15:33,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 228 transitions, 2700 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:33,707 INFO L231 Difference]: Finished difference. Result has 175 places, 217 transitions, 2266 flow [2024-06-21 21:15:33,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2266, PETRI_PLACES=175, PETRI_TRANSITIONS=217} [2024-06-21 21:15:33,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 21:15:33,707 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 217 transitions, 2266 flow [2024-06-21 21:15:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:33,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:33,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:33,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:15:33,708 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:33,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash 463929972, now seen corresponding path program 4 times [2024-06-21 21:15:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:33,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037625493] [2024-06-21 21:15:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:33,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:34,485 INFO 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 21:15:34,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037625493] [2024-06-21 21:15:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037625493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:34,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:34,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:34,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087347825] [2024-06-21 21:15:34,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:34,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:34,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:34,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 217 transitions, 2266 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:34,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:34,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:34,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:35,098 INFO L124 PetriNetUnfolderBase]: 1794/2909 cut-off events. [2024-06-21 21:15:35,098 INFO L125 PetriNetUnfolderBase]: For 118298/118298 co-relation queries the response was YES. [2024-06-21 21:15:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19888 conditions, 2909 events. 1794/2909 cut-off events. For 118298/118298 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16118 event pairs, 424 based on Foata normal form. 1/2909 useless extension candidates. Maximal degree in co-relation 19808. Up to 2720 conditions per place. [2024-06-21 21:15:35,123 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 23 changer transitions 0/232 dead transitions. [2024-06-21 21:15:35,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 232 transitions, 2834 flow [2024-06-21 21:15:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:15:35,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 21:15:35,126 INFO L175 Difference]: Start difference. First operand has 175 places, 217 transitions, 2266 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:15:35,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 232 transitions, 2834 flow [2024-06-21 21:15:35,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 232 transitions, 2738 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:35,271 INFO L231 Difference]: Finished difference. Result has 178 places, 220 transitions, 2306 flow [2024-06-21 21:15:35,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2306, PETRI_PLACES=178, PETRI_TRANSITIONS=220} [2024-06-21 21:15:35,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 21:15:35,272 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 220 transitions, 2306 flow [2024-06-21 21:15:35,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:35,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:35,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:35,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:15:35,273 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:35,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -546874079, now seen corresponding path program 5 times [2024-06-21 21:15:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495989818] [2024-06-21 21:15:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:35,974 INFO 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 21:15:35,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495989818] [2024-06-21 21:15:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495989818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:35,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:35,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:35,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788879651] [2024-06-21 21:15:35,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:35,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:36,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:36,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 220 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:36,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:36,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:36,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:36,602 INFO L124 PetriNetUnfolderBase]: 1845/2991 cut-off events. [2024-06-21 21:15:36,602 INFO L125 PetriNetUnfolderBase]: For 129153/129155 co-relation queries the response was YES. [2024-06-21 21:15:36,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20879 conditions, 2991 events. 1845/2991 cut-off events. For 129153/129155 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16677 event pairs, 419 based on Foata normal form. 5/2995 useless extension candidates. Maximal degree in co-relation 20798. Up to 2717 conditions per place. [2024-06-21 21:15:36,627 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 204 selfloop transitions, 36 changer transitions 0/245 dead transitions. [2024-06-21 21:15:36,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 245 transitions, 3089 flow [2024-06-21 21:15:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:15:36,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 21:15:36,628 INFO L175 Difference]: Start difference. First operand has 178 places, 220 transitions, 2306 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:15:36,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 245 transitions, 3089 flow [2024-06-21 21:15:36,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 245 transitions, 2975 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:36,797 INFO L231 Difference]: Finished difference. Result has 180 places, 228 transitions, 2449 flow [2024-06-21 21:15:36,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2449, PETRI_PLACES=180, PETRI_TRANSITIONS=228} [2024-06-21 21:15:36,797 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-21 21:15:36,798 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 228 transitions, 2449 flow [2024-06-21 21:15:36,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:36,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:36,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:36,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:15:36,798 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:36,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:36,799 INFO L85 PathProgramCache]: Analyzing trace with hash -547248869, now seen corresponding path program 6 times [2024-06-21 21:15:36,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:36,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247086269] [2024-06-21 21:15:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:36,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:37,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247086269] [2024-06-21 21:15:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247086269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:37,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:37,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:37,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603973733] [2024-06-21 21:15:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:37,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:37,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 228 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:37,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:37,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:37,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:38,015 INFO L124 PetriNetUnfolderBase]: 1840/2986 cut-off events. [2024-06-21 21:15:38,015 INFO L125 PetriNetUnfolderBase]: For 132534/132536 co-relation queries the response was YES. [2024-06-21 21:15:38,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20950 conditions, 2986 events. 1840/2986 cut-off events. For 132534/132536 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16676 event pairs, 432 based on Foata normal form. 5/2990 useless extension candidates. Maximal degree in co-relation 20867. Up to 2342 conditions per place. [2024-06-21 21:15:38,038 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 149 selfloop transitions, 91 changer transitions 0/245 dead transitions. [2024-06-21 21:15:38,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 245 transitions, 3249 flow [2024-06-21 21:15:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:15:38,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:15:38,040 INFO L175 Difference]: Start difference. First operand has 180 places, 228 transitions, 2449 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:15:38,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 245 transitions, 3249 flow [2024-06-21 21:15:38,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 245 transitions, 2976 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:38,206 INFO L231 Difference]: Finished difference. Result has 182 places, 228 transitions, 2366 flow [2024-06-21 21:15:38,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2366, PETRI_PLACES=182, PETRI_TRANSITIONS=228} [2024-06-21 21:15:38,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 21:15:38,207 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 228 transitions, 2366 flow [2024-06-21 21:15:38,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:38,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:38,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:15:38,208 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:38,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -894502546, now seen corresponding path program 1 times [2024-06-21 21:15:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337509790] [2024-06-21 21:15:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:39,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337509790] [2024-06-21 21:15:39,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337509790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888707004] [2024-06-21 21:15:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:39,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:39,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:39,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 228 transitions, 2366 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:39,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:39,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:39,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:39,612 INFO L124 PetriNetUnfolderBase]: 1845/2998 cut-off events. [2024-06-21 21:15:39,613 INFO L125 PetriNetUnfolderBase]: For 136233/136233 co-relation queries the response was YES. [2024-06-21 21:15:39,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 2998 events. 1845/2998 cut-off events. For 136233/136233 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16770 event pairs, 421 based on Foata normal form. 1/2998 useless extension candidates. Maximal degree in co-relation 20819. Up to 2788 conditions per place. [2024-06-21 21:15:39,636 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 226 selfloop transitions, 20 changer transitions 0/251 dead transitions. [2024-06-21 21:15:39,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 251 transitions, 2992 flow [2024-06-21 21:15:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:15:39,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 21:15:39,637 INFO L175 Difference]: Start difference. First operand has 182 places, 228 transitions, 2366 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:15:39,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 251 transitions, 2992 flow [2024-06-21 21:15:39,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 251 transitions, 2749 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:15:39,823 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 2280 flow [2024-06-21 21:15:39,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2280, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-21 21:15:39,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 21:15:39,824 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 2280 flow [2024-06-21 21:15:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:39,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:39,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:39,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:15:39,824 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:39,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -541319344, now seen corresponding path program 2 times [2024-06-21 21:15:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249704758] [2024-06-21 21:15:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249704758] [2024-06-21 21:15:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249704758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:40,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373653543] [2024-06-21 21:15:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:40,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:40,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:40,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:40,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 2280 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:40,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:40,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:40,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:41,255 INFO L124 PetriNetUnfolderBase]: 1873/3039 cut-off events. [2024-06-21 21:15:41,255 INFO L125 PetriNetUnfolderBase]: For 142836/142838 co-relation queries the response was YES. [2024-06-21 21:15:41,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21133 conditions, 3039 events. 1873/3039 cut-off events. For 142836/142838 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16982 event pairs, 418 based on Foata normal form. 4/3042 useless extension candidates. Maximal degree in co-relation 21050. Up to 2772 conditions per place. [2024-06-21 21:15:41,280 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 48 changer transitions 0/265 dead transitions. [2024-06-21 21:15:41,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 265 transitions, 3104 flow [2024-06-21 21:15:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:15:41,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 21:15:41,281 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 2280 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:15:41,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 265 transitions, 3104 flow [2024-06-21 21:15:41,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 265 transitions, 3051 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:41,489 INFO L231 Difference]: Finished difference. Result has 191 places, 248 transitions, 2499 flow [2024-06-21 21:15:41,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2499, PETRI_PLACES=191, PETRI_TRANSITIONS=248} [2024-06-21 21:15:41,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 21:15:41,489 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 248 transitions, 2499 flow [2024-06-21 21:15:41,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:41,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:41,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:15:41,490 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:41,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -541528594, now seen corresponding path program 3 times [2024-06-21 21:15:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955252920] [2024-06-21 21:15:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:42,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:42,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955252920] [2024-06-21 21:15:42,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955252920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:42,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:42,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:42,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868346595] [2024-06-21 21:15:42,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:42,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:42,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:42,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:42,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:42,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 248 transitions, 2499 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:42,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:42,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:42,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:42,920 INFO L124 PetriNetUnfolderBase]: 1870/3037 cut-off events. [2024-06-21 21:15:42,920 INFO L125 PetriNetUnfolderBase]: For 148734/148736 co-relation queries the response was YES. [2024-06-21 21:15:42,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 3037 events. 1870/3037 cut-off events. For 148734/148736 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17002 event pairs, 418 based on Foata normal form. 3/3039 useless extension candidates. Maximal degree in co-relation 21749. Up to 2808 conditions per place. [2024-06-21 21:15:42,945 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 234 selfloop transitions, 31 changer transitions 0/270 dead transitions. [2024-06-21 21:15:42,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 270 transitions, 3193 flow [2024-06-21 21:15:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:15:42,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 21:15:42,947 INFO L175 Difference]: Start difference. First operand has 191 places, 248 transitions, 2499 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:15:42,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 270 transitions, 3193 flow [2024-06-21 21:15:43,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 270 transitions, 3077 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:43,161 INFO L231 Difference]: Finished difference. Result has 197 places, 258 transitions, 2604 flow [2024-06-21 21:15:43,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2604, PETRI_PLACES=197, PETRI_TRANSITIONS=258} [2024-06-21 21:15:43,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 21:15:43,162 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 258 transitions, 2604 flow [2024-06-21 21:15:43,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:43,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:43,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:15:43,162 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:43,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash -483527854, now seen corresponding path program 1 times [2024-06-21 21:15:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801834294] [2024-06-21 21:15:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:43,839 INFO 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 21:15:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801834294] [2024-06-21 21:15:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801834294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:43,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:43,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738460197] [2024-06-21 21:15:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:43,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:43,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 258 transitions, 2604 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:43,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:43,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:43,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:44,601 INFO L124 PetriNetUnfolderBase]: 1880/3049 cut-off events. [2024-06-21 21:15:44,601 INFO L125 PetriNetUnfolderBase]: For 156024/156024 co-relation queries the response was YES. [2024-06-21 21:15:44,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22209 conditions, 3049 events. 1880/3049 cut-off events. For 156024/156024 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17119 event pairs, 420 based on Foata normal form. 2/3049 useless extension candidates. Maximal degree in co-relation 22119. Up to 2663 conditions per place. [2024-06-21 21:15:44,631 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 46 changer transitions 0/285 dead transitions. [2024-06-21 21:15:44,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 285 transitions, 3312 flow [2024-06-21 21:15:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:15:44,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:15:44,632 INFO L175 Difference]: Start difference. First operand has 197 places, 258 transitions, 2604 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:15:44,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 285 transitions, 3312 flow [2024-06-21 21:15:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 285 transitions, 3236 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:44,844 INFO L231 Difference]: Finished difference. Result has 202 places, 262 transitions, 2705 flow [2024-06-21 21:15:44,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=202, PETRI_TRANSITIONS=262} [2024-06-21 21:15:44,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 21:15:44,845 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 262 transitions, 2705 flow [2024-06-21 21:15:44,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:44,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:44,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:44,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:15:44,846 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:44,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash -312705268, now seen corresponding path program 1 times [2024-06-21 21:15:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:44,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731179916] [2024-06-21 21:15:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:44,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:45,466 INFO 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 21:15:45,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:45,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731179916] [2024-06-21 21:15:45,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731179916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:45,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:45,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:45,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284044431] [2024-06-21 21:15:45,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:45,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:45,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:45,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 262 transitions, 2705 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:45,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:45,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:45,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:46,132 INFO L124 PetriNetUnfolderBase]: 1991/3228 cut-off events. [2024-06-21 21:15:46,132 INFO L125 PetriNetUnfolderBase]: For 167432/167434 co-relation queries the response was YES. [2024-06-21 21:15:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24045 conditions, 3228 events. 1991/3228 cut-off events. For 167432/167434 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18091 event pairs, 433 based on Foata normal form. 6/3233 useless extension candidates. Maximal degree in co-relation 23953. Up to 2835 conditions per place. [2024-06-21 21:15:46,166 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 250 selfloop transitions, 51 changer transitions 0/306 dead transitions. [2024-06-21 21:15:46,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 306 transitions, 3740 flow [2024-06-21 21:15:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:15:46,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:15:46,167 INFO L175 Difference]: Start difference. First operand has 202 places, 262 transitions, 2705 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:15:46,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 306 transitions, 3740 flow [2024-06-21 21:15:46,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 306 transitions, 3532 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:46,466 INFO L231 Difference]: Finished difference. Result has 208 places, 285 transitions, 3022 flow [2024-06-21 21:15:46,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3022, PETRI_PLACES=208, PETRI_TRANSITIONS=285} [2024-06-21 21:15:46,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 21:15:46,466 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 285 transitions, 3022 flow [2024-06-21 21:15:46,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:46,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:46,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:46,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:15:46,467 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:46,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -929914620, now seen corresponding path program 2 times [2024-06-21 21:15:46,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:46,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198885785] [2024-06-21 21:15:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:46,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:47,063 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 21:15:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198885785] [2024-06-21 21:15:47,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198885785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:47,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:47,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907674761] [2024-06-21 21:15:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:47,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:47,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 285 transitions, 3022 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:47,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:47,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:47,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:47,781 INFO L124 PetriNetUnfolderBase]: 2086/3366 cut-off events. [2024-06-21 21:15:47,782 INFO L125 PetriNetUnfolderBase]: For 172450/172452 co-relation queries the response was YES. [2024-06-21 21:15:47,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25457 conditions, 3366 events. 2086/3366 cut-off events. For 172450/172452 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18863 event pairs, 422 based on Foata normal form. 6/3371 useless extension candidates. Maximal degree in co-relation 25360. Up to 2919 conditions per place. [2024-06-21 21:15:47,819 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 258 selfloop transitions, 72 changer transitions 0/335 dead transitions. [2024-06-21 21:15:47,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 335 transitions, 4175 flow [2024-06-21 21:15:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:15:47,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 21:15:47,820 INFO L175 Difference]: Start difference. First operand has 208 places, 285 transitions, 3022 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:15:47,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 335 transitions, 4175 flow [2024-06-21 21:15:48,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 335 transitions, 4033 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:48,160 INFO L231 Difference]: Finished difference. Result has 218 places, 310 transitions, 3532 flow [2024-06-21 21:15:48,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3532, PETRI_PLACES=218, PETRI_TRANSITIONS=310} [2024-06-21 21:15:48,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 21:15:48,160 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 310 transitions, 3532 flow [2024-06-21 21:15:48,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:48,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:48,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:48,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:15:48,161 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:48,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash -82548694, now seen corresponding path program 3 times [2024-06-21 21:15:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:48,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002370451] [2024-06-21 21:15:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:48,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:48,813 INFO 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 21:15:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002370451] [2024-06-21 21:15:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002370451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:48,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894168398] [2024-06-21 21:15:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:48,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:48,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 310 transitions, 3532 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:48,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:48,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:48,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:49,568 INFO L124 PetriNetUnfolderBase]: 2122/3426 cut-off events. [2024-06-21 21:15:49,568 INFO L125 PetriNetUnfolderBase]: For 184401/184403 co-relation queries the response was YES. [2024-06-21 21:15:49,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3426 events. 2122/3426 cut-off events. For 184401/184403 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19259 event pairs, 441 based on Foata normal form. 6/3431 useless extension candidates. Maximal degree in co-relation 26381. Up to 2740 conditions per place. [2024-06-21 21:15:49,607 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 236 selfloop transitions, 97 changer transitions 0/338 dead transitions. [2024-06-21 21:15:49,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 4654 flow [2024-06-21 21:15:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:15:49,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:15:49,608 INFO L175 Difference]: Start difference. First operand has 218 places, 310 transitions, 3532 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:15:49,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 4654 flow [2024-06-21 21:15:49,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 338 transitions, 4506 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:49,945 INFO L231 Difference]: Finished difference. Result has 221 places, 317 transitions, 3739 flow [2024-06-21 21:15:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3739, PETRI_PLACES=221, PETRI_TRANSITIONS=317} [2024-06-21 21:15:49,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-21 21:15:49,946 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 317 transitions, 3739 flow [2024-06-21 21:15:49,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:49,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:49,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:49,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:15:49,947 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:49,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash -306269668, now seen corresponding path program 4 times [2024-06-21 21:15:49,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:49,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336687917] [2024-06-21 21:15:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:50,699 INFO 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 21:15:50,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:50,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336687917] [2024-06-21 21:15:50,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336687917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:50,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:50,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:50,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807874181] [2024-06-21 21:15:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:50,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:50,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:50,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:50,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 317 transitions, 3739 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:50,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:50,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:50,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:51,536 INFO L124 PetriNetUnfolderBase]: 2271/3654 cut-off events. [2024-06-21 21:15:51,536 INFO L125 PetriNetUnfolderBase]: For 193480/193482 co-relation queries the response was YES. [2024-06-21 21:15:51,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28141 conditions, 3654 events. 2271/3654 cut-off events. For 193480/193482 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20810 event pairs, 439 based on Foata normal form. 6/3659 useless extension candidates. Maximal degree in co-relation 28038. Up to 3003 conditions per place. [2024-06-21 21:15:51,573 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 272 selfloop transitions, 96 changer transitions 0/373 dead transitions. [2024-06-21 21:15:51,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 373 transitions, 5127 flow [2024-06-21 21:15:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:15:51,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:15:51,575 INFO L175 Difference]: Start difference. First operand has 221 places, 317 transitions, 3739 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:15:51,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 373 transitions, 5127 flow [2024-06-21 21:15:51,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 373 transitions, 4864 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:51,969 INFO L231 Difference]: Finished difference. Result has 228 places, 348 transitions, 4190 flow [2024-06-21 21:15:51,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4190, PETRI_PLACES=228, PETRI_TRANSITIONS=348} [2024-06-21 21:15:51,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-21 21:15:51,970 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 348 transitions, 4190 flow [2024-06-21 21:15:51,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:51,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:51,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:51,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:15:51,971 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:51,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -601857706, now seen corresponding path program 1 times [2024-06-21 21:15:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:51,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882232197] [2024-06-21 21:15:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:52,523 INFO 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 21:15:52,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:52,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882232197] [2024-06-21 21:15:52,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882232197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:52,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:52,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:52,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404287241] [2024-06-21 21:15:52,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:52,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:52,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:52,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:52,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 348 transitions, 4190 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:52,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:52,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:52,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:53,454 INFO L124 PetriNetUnfolderBase]: 2307/3716 cut-off events. [2024-06-21 21:15:53,454 INFO L125 PetriNetUnfolderBase]: For 208487/208493 co-relation queries the response was YES. [2024-06-21 21:15:53,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28612 conditions, 3716 events. 2307/3716 cut-off events. For 208487/208493 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21186 event pairs, 360 based on Foata normal form. 16/3731 useless extension candidates. Maximal degree in co-relation 28506. Up to 3189 conditions per place. [2024-06-21 21:15:53,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 314 selfloop transitions, 63 changer transitions 0/382 dead transitions. [2024-06-21 21:15:53,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 382 transitions, 5152 flow [2024-06-21 21:15:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:15:53,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-21 21:15:53,494 INFO L175 Difference]: Start difference. First operand has 228 places, 348 transitions, 4190 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:15:53,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 382 transitions, 5152 flow [2024-06-21 21:15:53,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 382 transitions, 4978 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:53,899 INFO L231 Difference]: Finished difference. Result has 232 places, 352 transitions, 4236 flow [2024-06-21 21:15:53,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=232, PETRI_TRANSITIONS=352} [2024-06-21 21:15:53,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 21:15:53,900 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 352 transitions, 4236 flow [2024-06-21 21:15:53,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:53,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:53,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:15:53,901 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:53,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash -593286826, now seen corresponding path program 2 times [2024-06-21 21:15:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:53,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641416085] [2024-06-21 21:15:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:54,539 INFO 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 21:15:54,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641416085] [2024-06-21 21:15:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641416085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:54,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997836586] [2024-06-21 21:15:54,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:54,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:54,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 352 transitions, 4236 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:54,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:54,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:54,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:55,419 INFO L124 PetriNetUnfolderBase]: 2351/3793 cut-off events. [2024-06-21 21:15:55,419 INFO L125 PetriNetUnfolderBase]: For 220322/220328 co-relation queries the response was YES. [2024-06-21 21:15:55,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29367 conditions, 3793 events. 2351/3793 cut-off events. For 220322/220328 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21779 event pairs, 460 based on Foata normal form. 18/3810 useless extension candidates. Maximal degree in co-relation 29259. Up to 3284 conditions per place. [2024-06-21 21:15:55,533 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 310 selfloop transitions, 67 changer transitions 0/382 dead transitions. [2024-06-21 21:15:55,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 382 transitions, 5198 flow [2024-06-21 21:15:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:15:55,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 21:15:55,534 INFO L175 Difference]: Start difference. First operand has 232 places, 352 transitions, 4236 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:15:55,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 382 transitions, 5198 flow [2024-06-21 21:15:56,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 382 transitions, 5030 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:56,053 INFO L231 Difference]: Finished difference. Result has 235 places, 354 transitions, 4270 flow [2024-06-21 21:15:56,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4270, PETRI_PLACES=235, PETRI_TRANSITIONS=354} [2024-06-21 21:15:56,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 21:15:56,054 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 354 transitions, 4270 flow [2024-06-21 21:15:56,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:56,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:56,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:56,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:15:56,055 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:56,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash -306399496, now seen corresponding path program 3 times [2024-06-21 21:15:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:56,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033460740] [2024-06-21 21:15:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:56,722 INFO 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 21:15:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033460740] [2024-06-21 21:15:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033460740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:56,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:56,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:56,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031176001] [2024-06-21 21:15:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:56,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:56,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:56,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:56,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:56,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:56,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 354 transitions, 4270 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:56,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:56,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:57,581 INFO L124 PetriNetUnfolderBase]: 2395/3885 cut-off events. [2024-06-21 21:15:57,581 INFO L125 PetriNetUnfolderBase]: For 229460/229462 co-relation queries the response was YES. [2024-06-21 21:15:57,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29984 conditions, 3885 events. 2395/3885 cut-off events. For 229460/229462 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22576 event pairs, 441 based on Foata normal form. 14/3898 useless extension candidates. Maximal degree in co-relation 29875. Up to 3216 conditions per place. [2024-06-21 21:15:57,628 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 88 changer transitions 0/379 dead transitions. [2024-06-21 21:15:57,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 379 transitions, 5220 flow [2024-06-21 21:15:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:15:57,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 21:15:57,629 INFO L175 Difference]: Start difference. First operand has 235 places, 354 transitions, 4270 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:15:57,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 379 transitions, 5220 flow [2024-06-21 21:15:58,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 379 transitions, 5052 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:58,161 INFO L231 Difference]: Finished difference. Result has 237 places, 356 transitions, 4350 flow [2024-06-21 21:15:58,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4350, PETRI_PLACES=237, PETRI_TRANSITIONS=356} [2024-06-21 21:15:58,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 21:15:58,162 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 356 transitions, 4350 flow [2024-06-21 21:15:58,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:15:58,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:58,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:58,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:15:58,162 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:58,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash -593275914, now seen corresponding path program 1 times [2024-06-21 21:15:58,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:58,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077074359] [2024-06-21 21:15:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:58,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077074359] [2024-06-21 21:15:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077074359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:59,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:59,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:15:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770558624] [2024-06-21 21:15:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:15:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:15:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:15:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:15:59,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 356 transitions, 4350 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:59,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:59,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:15:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:59,977 INFO L124 PetriNetUnfolderBase]: 2405/3879 cut-off events. [2024-06-21 21:15:59,978 INFO L125 PetriNetUnfolderBase]: For 220841/220847 co-relation queries the response was YES. [2024-06-21 21:16:00,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30347 conditions, 3879 events. 2405/3879 cut-off events. For 220841/220847 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22342 event pairs, 468 based on Foata normal form. 8/3886 useless extension candidates. Maximal degree in co-relation 30237. Up to 3406 conditions per place. [2024-06-21 21:16:00,022 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 313 selfloop transitions, 75 changer transitions 0/393 dead transitions. [2024-06-21 21:16:00,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 393 transitions, 5434 flow [2024-06-21 21:16:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:16:00,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 21:16:00,023 INFO L175 Difference]: Start difference. First operand has 237 places, 356 transitions, 4350 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:16:00,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 393 transitions, 5434 flow [2024-06-21 21:16:00,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 393 transitions, 5212 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:00,479 INFO L231 Difference]: Finished difference. Result has 242 places, 370 transitions, 4554 flow [2024-06-21 21:16:00,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4554, PETRI_PLACES=242, PETRI_TRANSITIONS=370} [2024-06-21 21:16:00,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 21:16:00,480 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 370 transitions, 4554 flow [2024-06-21 21:16:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:00,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:00,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:00,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:16:00,480 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:00,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1893087346, now seen corresponding path program 2 times [2024-06-21 21:16:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072437853] [2024-06-21 21:16:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:01,395 INFO 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 21:16:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072437853] [2024-06-21 21:16:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072437853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:01,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:01,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510703694] [2024-06-21 21:16:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:01,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:01,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 370 transitions, 4554 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:01,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:01,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:01,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:02,326 INFO L124 PetriNetUnfolderBase]: 2415/3917 cut-off events. [2024-06-21 21:16:02,326 INFO L125 PetriNetUnfolderBase]: For 229131/229133 co-relation queries the response was YES. [2024-06-21 21:16:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30924 conditions, 3917 events. 2415/3917 cut-off events. For 229131/229133 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22805 event pairs, 433 based on Foata normal form. 4/3920 useless extension candidates. Maximal degree in co-relation 30811. Up to 3238 conditions per place. [2024-06-21 21:16:02,370 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 328 selfloop transitions, 114 changer transitions 0/447 dead transitions. [2024-06-21 21:16:02,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 447 transitions, 6423 flow [2024-06-21 21:16:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:16:02,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:16:02,372 INFO L175 Difference]: Start difference. First operand has 242 places, 370 transitions, 4554 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:16:02,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 447 transitions, 6423 flow [2024-06-21 21:16:02,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 447 transitions, 6183 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:02,809 INFO L231 Difference]: Finished difference. Result has 249 places, 422 transitions, 5464 flow [2024-06-21 21:16:02,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5464, PETRI_PLACES=249, PETRI_TRANSITIONS=422} [2024-06-21 21:16:02,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 21:16:02,810 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 422 transitions, 5464 flow [2024-06-21 21:16:02,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:02,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:02,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:02,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:16:02,811 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:02,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash -306042624, now seen corresponding path program 3 times [2024-06-21 21:16:02,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:02,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659597027] [2024-06-21 21:16:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:02,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:03,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659597027] [2024-06-21 21:16:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659597027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:03,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:03,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939763945] [2024-06-21 21:16:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:03,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:03,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 422 transitions, 5464 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:03,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:03,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:03,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:04,500 INFO L124 PetriNetUnfolderBase]: 2427/3914 cut-off events. [2024-06-21 21:16:04,500 INFO L125 PetriNetUnfolderBase]: For 237230/237232 co-relation queries the response was YES. [2024-06-21 21:16:04,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31876 conditions, 3914 events. 2427/3914 cut-off events. For 237230/237232 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22562 event pairs, 433 based on Foata normal form. 4/3917 useless extension candidates. Maximal degree in co-relation 31759. Up to 3253 conditions per place. [2024-06-21 21:16:04,550 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 331 selfloop transitions, 117 changer transitions 0/453 dead transitions. [2024-06-21 21:16:04,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 453 transitions, 6778 flow [2024-06-21 21:16:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:16:04,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:16:04,552 INFO L175 Difference]: Start difference. First operand has 249 places, 422 transitions, 5464 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:16:04,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 453 transitions, 6778 flow [2024-06-21 21:16:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 453 transitions, 6574 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:05,051 INFO L231 Difference]: Finished difference. Result has 256 places, 435 transitions, 5807 flow [2024-06-21 21:16:05,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5284, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5807, PETRI_PLACES=256, PETRI_TRANSITIONS=435} [2024-06-21 21:16:05,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 21:16:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 435 transitions, 5807 flow [2024-06-21 21:16:05,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:05,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:05,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:05,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:16:05,053 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:05,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2069567336, now seen corresponding path program 4 times [2024-06-21 21:16:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261883545] [2024-06-21 21:16:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:05,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:05,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261883545] [2024-06-21 21:16:05,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261883545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:05,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:05,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:05,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936200756] [2024-06-21 21:16:05,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:05,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:05,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:05,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:05,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 435 transitions, 5807 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:05,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:05,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:05,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:06,733 INFO L124 PetriNetUnfolderBase]: 2455/3956 cut-off events. [2024-06-21 21:16:06,733 INFO L125 PetriNetUnfolderBase]: For 248192/248194 co-relation queries the response was YES. [2024-06-21 21:16:06,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33016 conditions, 3956 events. 2455/3956 cut-off events. For 248192/248194 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22799 event pairs, 432 based on Foata normal form. 4/3959 useless extension candidates. Maximal degree in co-relation 32896. Up to 3213 conditions per place. [2024-06-21 21:16:06,782 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 335 selfloop transitions, 122 changer transitions 0/462 dead transitions. [2024-06-21 21:16:06,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 462 transitions, 7227 flow [2024-06-21 21:16:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:16:06,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 21:16:06,783 INFO L175 Difference]: Start difference. First operand has 256 places, 435 transitions, 5807 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:16:06,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 462 transitions, 7227 flow [2024-06-21 21:16:07,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 462 transitions, 7002 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:07,361 INFO L231 Difference]: Finished difference. Result has 262 places, 443 transitions, 6086 flow [2024-06-21 21:16:07,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6086, PETRI_PLACES=262, PETRI_TRANSITIONS=443} [2024-06-21 21:16:07,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-21 21:16:07,362 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 443 transitions, 6086 flow [2024-06-21 21:16:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:07,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:07,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:16:07,362 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:07,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash -306030100, now seen corresponding path program 1 times [2024-06-21 21:16:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:07,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153607278] [2024-06-21 21:16:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:08,500 INFO 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 21:16:08,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:08,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153607278] [2024-06-21 21:16:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153607278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:08,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:08,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648737114] [2024-06-21 21:16:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:08,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:08,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 443 transitions, 6086 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:08,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:08,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:08,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:09,451 INFO L124 PetriNetUnfolderBase]: 2468/3984 cut-off events. [2024-06-21 21:16:09,451 INFO L125 PetriNetUnfolderBase]: For 261013/261021 co-relation queries the response was YES. [2024-06-21 21:16:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33832 conditions, 3984 events. 2468/3984 cut-off events. For 261013/261021 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23100 event pairs, 421 based on Foata normal form. 10/3993 useless extension candidates. Maximal degree in co-relation 33710. Up to 3668 conditions per place. [2024-06-21 21:16:09,501 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 436 selfloop transitions, 27 changer transitions 0/468 dead transitions. [2024-06-21 21:16:09,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 468 transitions, 7220 flow [2024-06-21 21:16:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 21:16:09,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 21:16:09,502 INFO L175 Difference]: Start difference. First operand has 262 places, 443 transitions, 6086 flow. Second operand 10 states and 162 transitions. [2024-06-21 21:16:09,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 468 transitions, 7220 flow [2024-06-21 21:16:10,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 468 transitions, 6947 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:10,238 INFO L231 Difference]: Finished difference. Result has 270 places, 452 transitions, 6059 flow [2024-06-21 21:16:10,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5813, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6059, PETRI_PLACES=270, PETRI_TRANSITIONS=452} [2024-06-21 21:16:10,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 21:16:10,239 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 452 transitions, 6059 flow [2024-06-21 21:16:10,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:10,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:10,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:16:10,239 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:10,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2058713654, now seen corresponding path program 2 times [2024-06-21 21:16:10,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:10,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574394264] [2024-06-21 21:16:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:10,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:10,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574394264] [2024-06-21 21:16:10,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574394264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:10,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:10,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:10,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215159427] [2024-06-21 21:16:10,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:11,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:11,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 452 transitions, 6059 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:11,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:11,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:11,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:11,970 INFO L124 PetriNetUnfolderBase]: 2473/3977 cut-off events. [2024-06-21 21:16:11,971 INFO L125 PetriNetUnfolderBase]: For 264179/264179 co-relation queries the response was YES. [2024-06-21 21:16:12,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33681 conditions, 3977 events. 2473/3977 cut-off events. For 264179/264179 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22933 event pairs, 444 based on Foata normal form. 1/3974 useless extension candidates. Maximal degree in co-relation 33554. Up to 3419 conditions per place. [2024-06-21 21:16:12,016 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 400 selfloop transitions, 70 changer transitions 0/475 dead transitions. [2024-06-21 21:16:12,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 475 transitions, 7147 flow [2024-06-21 21:16:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:16:12,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:16:12,017 INFO L175 Difference]: Start difference. First operand has 270 places, 452 transitions, 6059 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:16:12,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 475 transitions, 7147 flow [2024-06-21 21:16:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 475 transitions, 7023 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:12,738 INFO L231 Difference]: Finished difference. Result has 274 places, 455 transitions, 6161 flow [2024-06-21 21:16:12,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6161, PETRI_PLACES=274, PETRI_TRANSITIONS=455} [2024-06-21 21:16:12,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 21:16:12,739 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 455 transitions, 6161 flow [2024-06-21 21:16:12,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:12,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:12,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:16:12,740 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:12,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 783279416, now seen corresponding path program 3 times [2024-06-21 21:16:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:12,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461591679] [2024-06-21 21:16:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:13,442 INFO 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 21:16:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461591679] [2024-06-21 21:16:13,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461591679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:13,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:13,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:13,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015121715] [2024-06-21 21:16:13,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:13,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:13,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:13,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:13,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:13,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 455 transitions, 6161 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:13,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:13,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:14,502 INFO L124 PetriNetUnfolderBase]: 2478/3984 cut-off events. [2024-06-21 21:16:14,503 INFO L125 PetriNetUnfolderBase]: For 272032/272032 co-relation queries the response was YES. [2024-06-21 21:16:14,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34177 conditions, 3984 events. 2478/3984 cut-off events. For 272032/272032 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22978 event pairs, 446 based on Foata normal form. 1/3981 useless extension candidates. Maximal degree in co-relation 34049. Up to 3426 conditions per place. [2024-06-21 21:16:14,548 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 396 selfloop transitions, 75 changer transitions 0/476 dead transitions. [2024-06-21 21:16:14,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 476 transitions, 7241 flow [2024-06-21 21:16:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:16:14,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:16:14,550 INFO L175 Difference]: Start difference. First operand has 274 places, 455 transitions, 6161 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:16:14,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 476 transitions, 7241 flow [2024-06-21 21:16:15,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 476 transitions, 7037 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:15,180 INFO L231 Difference]: Finished difference. Result has 276 places, 458 transitions, 6199 flow [2024-06-21 21:16:15,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6199, PETRI_PLACES=276, PETRI_TRANSITIONS=458} [2024-06-21 21:16:15,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 21:16:15,181 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 458 transitions, 6199 flow [2024-06-21 21:16:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:15,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:15,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:16:15,182 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:15,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1010224806, now seen corresponding path program 4 times [2024-06-21 21:16:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233651818] [2024-06-21 21:16:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:15,848 INFO 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 21:16:15,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:15,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233651818] [2024-06-21 21:16:15,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233651818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:15,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:15,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778490989] [2024-06-21 21:16:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:15,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:15,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:15,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:15,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 458 transitions, 6199 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:15,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:15,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:15,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:16,791 INFO L124 PetriNetUnfolderBase]: 2475/3980 cut-off events. [2024-06-21 21:16:16,791 INFO L125 PetriNetUnfolderBase]: For 278356/278356 co-relation queries the response was YES. [2024-06-21 21:16:16,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34415 conditions, 3980 events. 2475/3980 cut-off events. For 278356/278356 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22980 event pairs, 446 based on Foata normal form. 1/3978 useless extension candidates. Maximal degree in co-relation 34286. Up to 3407 conditions per place. [2024-06-21 21:16:16,836 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 87 changer transitions 0/479 dead transitions. [2024-06-21 21:16:16,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 479 transitions, 7311 flow [2024-06-21 21:16:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:16:16,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 21:16:16,838 INFO L175 Difference]: Start difference. First operand has 276 places, 458 transitions, 6199 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:16:16,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 479 transitions, 7311 flow [2024-06-21 21:16:17,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 479 transitions, 7091 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:17,465 INFO L231 Difference]: Finished difference. Result has 279 places, 464 transitions, 6304 flow [2024-06-21 21:16:17,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6304, PETRI_PLACES=279, PETRI_TRANSITIONS=464} [2024-06-21 21:16:17,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-21 21:16:17,466 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 464 transitions, 6304 flow [2024-06-21 21:16:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:17,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:17,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:16:17,467 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:17,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash -660710120, now seen corresponding path program 5 times [2024-06-21 21:16:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:17,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168419742] [2024-06-21 21:16:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:18,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:18,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168419742] [2024-06-21 21:16:18,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168419742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:18,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:18,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104000975] [2024-06-21 21:16:18,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:18,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:18,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:18,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 464 transitions, 6304 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:19,016 INFO L124 PetriNetUnfolderBase]: 2465/3971 cut-off events. [2024-06-21 21:16:19,017 INFO L125 PetriNetUnfolderBase]: For 285414/285414 co-relation queries the response was YES. [2024-06-21 21:16:19,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34519 conditions, 3971 events. 2465/3971 cut-off events. For 285414/285414 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22934 event pairs, 436 based on Foata normal form. 2/3971 useless extension candidates. Maximal degree in co-relation 34388. Up to 3503 conditions per place. [2024-06-21 21:16:19,068 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 403 selfloop transitions, 73 changer transitions 0/481 dead transitions. [2024-06-21 21:16:19,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 481 transitions, 7327 flow [2024-06-21 21:16:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:16:19,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:16:19,069 INFO L175 Difference]: Start difference. First operand has 279 places, 464 transitions, 6304 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:16:19,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 481 transitions, 7327 flow [2024-06-21 21:16:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 481 transitions, 7091 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:19,909 INFO L231 Difference]: Finished difference. Result has 283 places, 464 transitions, 6225 flow [2024-06-21 21:16:19,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6225, PETRI_PLACES=283, PETRI_TRANSITIONS=464} [2024-06-21 21:16:19,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 21:16:19,910 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 464 transitions, 6225 flow [2024-06-21 21:16:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:19,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:19,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:19,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:16:19,910 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:19,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash -895170600, now seen corresponding path program 6 times [2024-06-21 21:16:19,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:19,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833661339] [2024-06-21 21:16:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:20,567 INFO 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 21:16:20,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:20,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833661339] [2024-06-21 21:16:20,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833661339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:20,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:20,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682526999] [2024-06-21 21:16:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:20,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:20,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:20,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:20,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 464 transitions, 6225 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:20,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:20,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:20,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:21,494 INFO L124 PetriNetUnfolderBase]: 2491/4007 cut-off events. [2024-06-21 21:16:21,495 INFO L125 PetriNetUnfolderBase]: For 296966/296966 co-relation queries the response was YES. [2024-06-21 21:16:21,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35127 conditions, 4007 events. 2491/4007 cut-off events. For 296966/296966 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23184 event pairs, 431 based on Foata normal form. 2/4007 useless extension candidates. Maximal degree in co-relation 34994. Up to 3404 conditions per place. [2024-06-21 21:16:21,549 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 362 selfloop transitions, 120 changer transitions 0/487 dead transitions. [2024-06-21 21:16:21,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 487 transitions, 7534 flow [2024-06-21 21:16:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:16:21,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 21:16:21,550 INFO L175 Difference]: Start difference. First operand has 283 places, 464 transitions, 6225 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:16:21,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 487 transitions, 7534 flow [2024-06-21 21:16:22,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 487 transitions, 7114 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 21:16:22,377 INFO L231 Difference]: Finished difference. Result has 284 places, 470 transitions, 6195 flow [2024-06-21 21:16:22,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5805, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6195, PETRI_PLACES=284, PETRI_TRANSITIONS=470} [2024-06-21 21:16:22,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 21:16:22,378 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 470 transitions, 6195 flow [2024-06-21 21:16:22,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:22,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:22,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:22,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:16:22,379 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:22,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash 788312762, now seen corresponding path program 7 times [2024-06-21 21:16:22,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:22,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061599989] [2024-06-21 21:16:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:22,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:23,130 INFO 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 21:16:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061599989] [2024-06-21 21:16:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061599989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:23,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:23,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:16:23,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449662839] [2024-06-21 21:16:23,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:23,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:16:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:16:23,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:16:23,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:23,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 470 transitions, 6195 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:16:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:23,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:24,083 INFO L124 PetriNetUnfolderBase]: 2485/4003 cut-off events. [2024-06-21 21:16:24,084 INFO L125 PetriNetUnfolderBase]: For 299086/299086 co-relation queries the response was YES. [2024-06-21 21:16:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35084 conditions, 4003 events. 2485/4003 cut-off events. For 299086/299086 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23181 event pairs, 480 based on Foata normal form. 2/4004 useless extension candidates. Maximal degree in co-relation 34949. Up to 3696 conditions per place. [2024-06-21 21:16:24,137 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 454 selfloop transitions, 25 changer transitions 0/484 dead transitions. [2024-06-21 21:16:24,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 484 transitions, 7213 flow [2024-06-21 21:16:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:16:24,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 21:16:24,141 INFO L175 Difference]: Start difference. First operand has 284 places, 470 transitions, 6195 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:16:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 484 transitions, 7213 flow [2024-06-21 21:16:24,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 484 transitions, 6903 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:24,941 INFO L231 Difference]: Finished difference. Result has 287 places, 470 transitions, 5942 flow [2024-06-21 21:16:24,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5942, PETRI_PLACES=287, PETRI_TRANSITIONS=470} [2024-06-21 21:16:24,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 21:16:24,946 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 470 transitions, 5942 flow [2024-06-21 21:16:24,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:16:24,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:24,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:16:24,947 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:24,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1496516378, now seen corresponding path program 8 times [2024-06-21 21:16:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835260710] [2024-06-21 21:16:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:25,635 INFO 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 21:16:25,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:25,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835260710] [2024-06-21 21:16:25,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835260710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:25,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:25,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617743908] [2024-06-21 21:16:25,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:25,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:25,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:25,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:25,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 470 transitions, 5942 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:25,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:25,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:26,590 INFO L124 PetriNetUnfolderBase]: 2489/4007 cut-off events. [2024-06-21 21:16:26,590 INFO L125 PetriNetUnfolderBase]: For 305302/305304 co-relation queries the response was YES. [2024-06-21 21:16:26,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34702 conditions, 4007 events. 2489/4007 cut-off events. For 305302/305304 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23196 event pairs, 480 based on Foata normal form. 6/4012 useless extension candidates. Maximal degree in co-relation 34566. Up to 3624 conditions per place. [2024-06-21 21:16:26,642 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 429 selfloop transitions, 54 changer transitions 0/488 dead transitions. [2024-06-21 21:16:26,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 488 transitions, 7188 flow [2024-06-21 21:16:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:16:26,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 21:16:26,643 INFO L175 Difference]: Start difference. First operand has 287 places, 470 transitions, 5942 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:16:26,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 488 transitions, 7188 flow [2024-06-21 21:16:27,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 488 transitions, 7091 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:16:27,581 INFO L231 Difference]: Finished difference. Result has 288 places, 473 transitions, 6030 flow [2024-06-21 21:16:27,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6030, PETRI_PLACES=288, PETRI_TRANSITIONS=473} [2024-06-21 21:16:27,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-21 21:16:27,582 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 473 transitions, 6030 flow [2024-06-21 21:16:27,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:27,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:27,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:27,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:16:27,583 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:27,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1021892218, now seen corresponding path program 9 times [2024-06-21 21:16:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396680421] [2024-06-21 21:16:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:28,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:28,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396680421] [2024-06-21 21:16:28,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396680421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:28,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:28,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457350599] [2024-06-21 21:16:28,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:28,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:28,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:28,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 473 transitions, 6030 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:28,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:28,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:28,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:29,260 INFO L124 PetriNetUnfolderBase]: 2499/4023 cut-off events. [2024-06-21 21:16:29,260 INFO L125 PetriNetUnfolderBase]: For 309393/309395 co-relation queries the response was YES. [2024-06-21 21:16:29,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35060 conditions, 4023 events. 2499/4023 cut-off events. For 309393/309395 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23318 event pairs, 482 based on Foata normal form. 4/4026 useless extension candidates. Maximal degree in co-relation 34923. Up to 3630 conditions per place. [2024-06-21 21:16:29,314 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 431 selfloop transitions, 58 changer transitions 0/494 dead transitions. [2024-06-21 21:16:29,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 494 transitions, 7318 flow [2024-06-21 21:16:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:16:29,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 21:16:29,320 INFO L175 Difference]: Start difference. First operand has 288 places, 473 transitions, 6030 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:16:29,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 494 transitions, 7318 flow [2024-06-21 21:16:30,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 494 transitions, 7180 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:30,217 INFO L231 Difference]: Finished difference. Result has 293 places, 476 transitions, 6090 flow [2024-06-21 21:16:30,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6090, PETRI_PLACES=293, PETRI_TRANSITIONS=476} [2024-06-21 21:16:30,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 21:16:30,218 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 476 transitions, 6090 flow [2024-06-21 21:16:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:30,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:30,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:30,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:16:30,219 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:30,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash 214922342, now seen corresponding path program 10 times [2024-06-21 21:16:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519214370] [2024-06-21 21:16:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:30,878 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 21:16:30,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:30,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519214370] [2024-06-21 21:16:30,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519214370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:30,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:30,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:16:30,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547893552] [2024-06-21 21:16:30,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:30,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:16:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:16:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:16:30,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:30,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 476 transitions, 6090 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:16:30,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:30,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:30,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:31,792 INFO L124 PetriNetUnfolderBase]: 2535/4070 cut-off events. [2024-06-21 21:16:31,792 INFO L125 PetriNetUnfolderBase]: For 326310/326312 co-relation queries the response was YES. [2024-06-21 21:16:31,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35710 conditions, 4070 events. 2535/4070 cut-off events. For 326310/326312 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23542 event pairs, 448 based on Foata normal form. 6/4075 useless extension candidates. Maximal degree in co-relation 35572. Up to 2983 conditions per place. [2024-06-21 21:16:31,847 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 282 selfloop transitions, 212 changer transitions 0/499 dead transitions. [2024-06-21 21:16:31,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 499 transitions, 7724 flow [2024-06-21 21:16:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:16:31,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:16:31,848 INFO L175 Difference]: Start difference. First operand has 293 places, 476 transitions, 6090 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:16:31,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 499 transitions, 7724 flow [2024-06-21 21:16:32,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 499 transitions, 7560 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 21:16:32,766 INFO L231 Difference]: Finished difference. Result has 293 places, 483 transitions, 6503 flow [2024-06-21 21:16:32,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6503, PETRI_PLACES=293, PETRI_TRANSITIONS=483} [2024-06-21 21:16:32,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 21:16:32,767 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 483 transitions, 6503 flow [2024-06-21 21:16:32,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 21:16:32,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:32,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:32,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:16:32,767 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:32,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash 838326028, now seen corresponding path program 11 times [2024-06-21 21:16:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:32,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921264831] [2024-06-21 21:16:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:33,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921264831] [2024-06-21 21:16:33,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921264831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:33,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775551162] [2024-06-21 21:16:33,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:33,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:33,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:33,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:33,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:33,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 483 transitions, 6503 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:33,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:33,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:33,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:34,309 INFO L124 PetriNetUnfolderBase]: 2523/4052 cut-off events. [2024-06-21 21:16:34,309 INFO L125 PetriNetUnfolderBase]: For 327698/327700 co-relation queries the response was YES. [2024-06-21 21:16:34,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35905 conditions, 4052 events. 2523/4052 cut-off events. For 327698/327700 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23384 event pairs, 447 based on Foata normal form. 6/4057 useless extension candidates. Maximal degree in co-relation 35766. Up to 2975 conditions per place. [2024-06-21 21:16:34,363 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 285 selfloop transitions, 209 changer transitions 0/499 dead transitions. [2024-06-21 21:16:34,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 499 transitions, 7999 flow [2024-06-21 21:16:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:16:34,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:16:34,365 INFO L175 Difference]: Start difference. First operand has 293 places, 483 transitions, 6503 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:16:34,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 499 transitions, 7999 flow [2024-06-21 21:16:35,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 499 transitions, 7543 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:35,193 INFO L231 Difference]: Finished difference. Result has 297 places, 483 transitions, 6474 flow [2024-06-21 21:16:35,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6474, PETRI_PLACES=297, PETRI_TRANSITIONS=483} [2024-06-21 21:16:35,194 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-21 21:16:35,194 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 483 transitions, 6474 flow [2024-06-21 21:16:35,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:35,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:35,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:35,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:16:35,195 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:35,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1015636108, now seen corresponding path program 12 times [2024-06-21 21:16:35,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:35,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506853541] [2024-06-21 21:16:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:35,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:35,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506853541] [2024-06-21 21:16:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506853541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:35,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:35,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531508492] [2024-06-21 21:16:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:35,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:35,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:35,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 483 transitions, 6474 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:35,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:35,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:36,824 INFO L124 PetriNetUnfolderBase]: 2513/4039 cut-off events. [2024-06-21 21:16:36,824 INFO L125 PetriNetUnfolderBase]: For 324444/324446 co-relation queries the response was YES. [2024-06-21 21:16:36,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35569 conditions, 4039 events. 2513/4039 cut-off events. For 324444/324446 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23346 event pairs, 483 based on Foata normal form. 4/4042 useless extension candidates. Maximal degree in co-relation 35429. Up to 3710 conditions per place. [2024-06-21 21:16:36,874 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 448 selfloop transitions, 42 changer transitions 0/495 dead transitions. [2024-06-21 21:16:36,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 495 transitions, 7508 flow [2024-06-21 21:16:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:16:36,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 21:16:36,876 INFO L175 Difference]: Start difference. First operand has 297 places, 483 transitions, 6474 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:16:36,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 495 transitions, 7508 flow [2024-06-21 21:16:37,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 495 transitions, 7063 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:37,671 INFO L231 Difference]: Finished difference. Result has 299 places, 483 transitions, 6120 flow [2024-06-21 21:16:37,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6029, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6120, PETRI_PLACES=299, PETRI_TRANSITIONS=483} [2024-06-21 21:16:37,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-21 21:16:37,671 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 483 transitions, 6120 flow [2024-06-21 21:16:37,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:37,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:37,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:37,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:16:37,672 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:37,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 953536186, now seen corresponding path program 13 times [2024-06-21 21:16:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:37,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762559888] [2024-06-21 21:16:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:37,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762559888] [2024-06-21 21:16:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762559888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:38,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:38,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048695087] [2024-06-21 21:16:38,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:38,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:38,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 483 transitions, 6120 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:38,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:38,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:38,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:39,186 INFO L124 PetriNetUnfolderBase]: 2503/4028 cut-off events. [2024-06-21 21:16:39,187 INFO L125 PetriNetUnfolderBase]: For 324599/324601 co-relation queries the response was YES. [2024-06-21 21:16:39,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34797 conditions, 4028 events. 2503/4028 cut-off events. For 324599/324601 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23317 event pairs, 457 based on Foata normal form. 4/4031 useless extension candidates. Maximal degree in co-relation 34656. Up to 2959 conditions per place. [2024-06-21 21:16:39,239 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 263 selfloop transitions, 232 changer transitions 0/500 dead transitions. [2024-06-21 21:16:39,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 500 transitions, 7377 flow [2024-06-21 21:16:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:16:39,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 21:16:39,241 INFO L175 Difference]: Start difference. First operand has 299 places, 483 transitions, 6120 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:16:39,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 500 transitions, 7377 flow [2024-06-21 21:16:40,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 500 transitions, 7182 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 21:16:40,246 INFO L231 Difference]: Finished difference. Result has 298 places, 483 transitions, 6395 flow [2024-06-21 21:16:40,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5925, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6395, PETRI_PLACES=298, PETRI_TRANSITIONS=483} [2024-06-21 21:16:40,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-21 21:16:40,247 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 483 transitions, 6395 flow [2024-06-21 21:16:40,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:40,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:40,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:40,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:16:40,247 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:40,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash 214799024, now seen corresponding path program 4 times [2024-06-21 21:16:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:40,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156565810] [2024-06-21 21:16:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:40,923 INFO 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 21:16:40,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:40,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156565810] [2024-06-21 21:16:40,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156565810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:40,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:40,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128355099] [2024-06-21 21:16:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:41,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:41,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 483 transitions, 6395 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:41,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:41,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:41,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:41,878 INFO L124 PetriNetUnfolderBase]: 2534/4085 cut-off events. [2024-06-21 21:16:41,878 INFO L125 PetriNetUnfolderBase]: For 356183/356185 co-relation queries the response was YES. [2024-06-21 21:16:41,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35635 conditions, 4085 events. 2534/4085 cut-off events. For 356183/356185 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23837 event pairs, 450 based on Foata normal form. 14/4098 useless extension candidates. Maximal degree in co-relation 35494. Up to 3359 conditions per place. [2024-06-21 21:16:41,932 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 374 selfloop transitions, 124 changer transitions 0/503 dead transitions. [2024-06-21 21:16:41,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 503 transitions, 7612 flow [2024-06-21 21:16:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:16:41,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 21:16:41,934 INFO L175 Difference]: Start difference. First operand has 298 places, 483 transitions, 6395 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:16:41,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 503 transitions, 7612 flow [2024-06-21 21:16:42,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 503 transitions, 6989 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:16:42,790 INFO L231 Difference]: Finished difference. Result has 296 places, 485 transitions, 6110 flow [2024-06-21 21:16:42,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5772, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6110, PETRI_PLACES=296, PETRI_TRANSITIONS=485} [2024-06-21 21:16:42,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 21:16:42,791 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 485 transitions, 6110 flow [2024-06-21 21:16:42,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:42,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:42,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:16:42,792 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:42,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1251641402, now seen corresponding path program 5 times [2024-06-21 21:16:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060451144] [2024-06-21 21:16:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:43,815 INFO 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 21:16:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060451144] [2024-06-21 21:16:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060451144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:43,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425831142] [2024-06-21 21:16:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:43,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:43,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:43,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 485 transitions, 6110 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:43,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:43,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:43,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:44,976 INFO L124 PetriNetUnfolderBase]: 2585/4153 cut-off events. [2024-06-21 21:16:44,976 INFO L125 PetriNetUnfolderBase]: For 352417/352419 co-relation queries the response was YES. [2024-06-21 21:16:45,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36557 conditions, 4153 events. 2585/4153 cut-off events. For 352417/352419 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24143 event pairs, 486 based on Foata normal form. 5/4157 useless extension candidates. Maximal degree in co-relation 36415. Up to 3669 conditions per place. [2024-06-21 21:16:45,040 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 421 selfloop transitions, 88 changer transitions 0/514 dead transitions. [2024-06-21 21:16:45,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 514 transitions, 7797 flow [2024-06-21 21:16:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:16:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:16:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 21:16:45,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-21 21:16:45,041 INFO L175 Difference]: Start difference. First operand has 296 places, 485 transitions, 6110 flow. Second operand 11 states and 192 transitions. [2024-06-21 21:16:45,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 514 transitions, 7797 flow [2024-06-21 21:16:46,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 514 transitions, 7499 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:46,110 INFO L231 Difference]: Finished difference. Result has 302 places, 495 transitions, 6319 flow [2024-06-21 21:16:46,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6319, PETRI_PLACES=302, PETRI_TRANSITIONS=495} [2024-06-21 21:16:46,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 21:16:46,110 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 495 transitions, 6319 flow [2024-06-21 21:16:46,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:46,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:46,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:16:46,111 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:46,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1251641836, now seen corresponding path program 2 times [2024-06-21 21:16:46,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:46,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408725778] [2024-06-21 21:16:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:46,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:47,331 INFO 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 21:16:47,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408725778] [2024-06-21 21:16:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408725778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:47,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:47,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:47,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177349214] [2024-06-21 21:16:47,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:47,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:47,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:47,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:47,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 495 transitions, 6319 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:47,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:47,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:47,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:48,339 INFO L124 PetriNetUnfolderBase]: 2593/4162 cut-off events. [2024-06-21 21:16:48,340 INFO L125 PetriNetUnfolderBase]: For 363731/363731 co-relation queries the response was YES. [2024-06-21 21:16:48,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37281 conditions, 4162 events. 2593/4162 cut-off events. For 363731/363731 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24159 event pairs, 489 based on Foata normal form. 2/4163 useless extension candidates. Maximal degree in co-relation 37137. Up to 3863 conditions per place. [2024-06-21 21:16:48,399 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 479 selfloop transitions, 26 changer transitions 0/510 dead transitions. [2024-06-21 21:16:48,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 510 transitions, 7469 flow [2024-06-21 21:16:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 21:16:48,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 21:16:48,401 INFO L175 Difference]: Start difference. First operand has 302 places, 495 transitions, 6319 flow. Second operand 10 states and 159 transitions. [2024-06-21 21:16:48,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 510 transitions, 7469 flow [2024-06-21 21:16:49,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 510 transitions, 7182 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-21 21:16:49,642 INFO L231 Difference]: Finished difference. Result has 305 places, 497 transitions, 6200 flow [2024-06-21 21:16:49,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6032, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6200, PETRI_PLACES=305, PETRI_TRANSITIONS=497} [2024-06-21 21:16:49,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-21 21:16:49,643 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 497 transitions, 6200 flow [2024-06-21 21:16:49,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:49,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:49,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:49,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:16:49,643 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:49,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 214809936, now seen corresponding path program 6 times [2024-06-21 21:16:49,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:49,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96427694] [2024-06-21 21:16:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:50,506 INFO 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 21:16:50,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:50,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96427694] [2024-06-21 21:16:50,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96427694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:50,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:50,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:50,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324534518] [2024-06-21 21:16:50,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:50,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:50,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:50,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:50,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 497 transitions, 6200 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:50,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:50,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:50,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:51,528 INFO L124 PetriNetUnfolderBase]: 2603/4184 cut-off events. [2024-06-21 21:16:51,528 INFO L125 PetriNetUnfolderBase]: For 374043/374045 co-relation queries the response was YES. [2024-06-21 21:16:51,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37279 conditions, 4184 events. 2603/4184 cut-off events. For 374043/374045 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24342 event pairs, 446 based on Foata normal form. 4/4187 useless extension candidates. Maximal degree in co-relation 37133. Up to 3396 conditions per place. [2024-06-21 21:16:51,585 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 397 selfloop transitions, 148 changer transitions 0/550 dead transitions. [2024-06-21 21:16:51,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 550 transitions, 7907 flow [2024-06-21 21:16:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:16:51,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:16:51,586 INFO L175 Difference]: Start difference. First operand has 305 places, 497 transitions, 6200 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:16:51,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 550 transitions, 7907 flow [2024-06-21 21:16:52,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 550 transitions, 7757 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-21 21:16:52,640 INFO L231 Difference]: Finished difference. Result has 309 places, 535 transitions, 6903 flow [2024-06-21 21:16:52,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6903, PETRI_PLACES=309, PETRI_TRANSITIONS=535} [2024-06-21 21:16:52,641 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-21 21:16:52,641 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 535 transitions, 6903 flow [2024-06-21 21:16:52,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:52,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:52,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:52,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:16:52,641 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:52,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:52,642 INFO L85 PathProgramCache]: Analyzing trace with hash 215167986, now seen corresponding path program 7 times [2024-06-21 21:16:52,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:52,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337713269] [2024-06-21 21:16:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:52,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337713269] [2024-06-21 21:16:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337713269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:53,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:53,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:53,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328633950] [2024-06-21 21:16:53,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:53,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:53,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:53,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:53,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 535 transitions, 6903 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:53,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:53,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:53,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:54,647 INFO L124 PetriNetUnfolderBase]: 2615/4192 cut-off events. [2024-06-21 21:16:54,647 INFO L125 PetriNetUnfolderBase]: For 384403/384405 co-relation queries the response was YES. [2024-06-21 21:16:54,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38492 conditions, 4192 events. 2615/4192 cut-off events. For 384403/384405 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24309 event pairs, 448 based on Foata normal form. 4/4195 useless extension candidates. Maximal degree in co-relation 38342. Up to 3372 conditions per place. [2024-06-21 21:16:54,702 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 412 selfloop transitions, 145 changer transitions 0/562 dead transitions. [2024-06-21 21:16:54,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 562 transitions, 8765 flow [2024-06-21 21:16:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:16:54,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:16:54,703 INFO L175 Difference]: Start difference. First operand has 309 places, 535 transitions, 6903 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:16:54,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 562 transitions, 8765 flow [2024-06-21 21:16:55,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 562 transitions, 8418 flow, removed 114 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:55,790 INFO L231 Difference]: Finished difference. Result has 317 places, 548 transitions, 7251 flow [2024-06-21 21:16:55,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7251, PETRI_PLACES=317, PETRI_TRANSITIONS=548} [2024-06-21 21:16:55,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-21 21:16:55,791 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 548 transitions, 7251 flow [2024-06-21 21:16:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:55,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:55,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:55,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:16:55,791 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:55,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1252117066, now seen corresponding path program 3 times [2024-06-21 21:16:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013673819] [2024-06-21 21:16:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:56,828 INFO 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 21:16:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013673819] [2024-06-21 21:16:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013673819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:56,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:56,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680192827] [2024-06-21 21:16:56,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:56,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:16:56,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 548 transitions, 7251 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:56,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:56,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:16:56,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:58,032 INFO L124 PetriNetUnfolderBase]: 2623/4204 cut-off events. [2024-06-21 21:16:58,033 INFO L125 PetriNetUnfolderBase]: For 398165/398165 co-relation queries the response was YES. [2024-06-21 21:16:58,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39314 conditions, 4204 events. 2623/4204 cut-off events. For 398165/398165 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24376 event pairs, 471 based on Foata normal form. 2/4205 useless extension candidates. Maximal degree in co-relation 39160. Up to 3892 conditions per place. [2024-06-21 21:16:58,086 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 530 selfloop transitions, 29 changer transitions 0/564 dead transitions. [2024-06-21 21:16:58,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 564 transitions, 8521 flow [2024-06-21 21:16:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 21:16:58,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 21:16:58,088 INFO L175 Difference]: Start difference. First operand has 317 places, 548 transitions, 7251 flow. Second operand 10 states and 161 transitions. [2024-06-21 21:16:58,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 564 transitions, 8521 flow [2024-06-21 21:16:59,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 564 transitions, 8226 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:59,216 INFO L231 Difference]: Finished difference. Result has 324 places, 550 transitions, 7139 flow [2024-06-21 21:16:59,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7139, PETRI_PLACES=324, PETRI_TRANSITIONS=550} [2024-06-21 21:16:59,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-21 21:16:59,217 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 550 transitions, 7139 flow [2024-06-21 21:16:59,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:59,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:59,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:59,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:16:59,217 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:59,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash 838334956, now seen corresponding path program 4 times [2024-06-21 21:16:59,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:59,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471319407] [2024-06-21 21:16:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:00,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471319407] [2024-06-21 21:17:00,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471319407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:00,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:00,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611721524] [2024-06-21 21:17:00,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:00,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:00,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:00,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 550 transitions, 7139 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:00,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:00,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:00,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:01,141 INFO L124 PetriNetUnfolderBase]: 2631/4229 cut-off events. [2024-06-21 21:17:01,142 INFO L125 PetriNetUnfolderBase]: For 406617/406629 co-relation queries the response was YES. [2024-06-21 21:17:01,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39409 conditions, 4229 events. 2631/4229 cut-off events. For 406617/406629 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24617 event pairs, 415 based on Foata normal form. 14/4242 useless extension candidates. Maximal degree in co-relation 39253. Up to 3884 conditions per place. [2024-06-21 21:17:01,307 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 518 selfloop transitions, 42 changer transitions 0/565 dead transitions. [2024-06-21 21:17:01,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 565 transitions, 8419 flow [2024-06-21 21:17:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:17:01,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 21:17:01,309 INFO L175 Difference]: Start difference. First operand has 324 places, 550 transitions, 7139 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:17:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 565 transitions, 8419 flow [2024-06-21 21:17:02,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 565 transitions, 8252 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-21 21:17:02,597 INFO L231 Difference]: Finished difference. Result has 325 places, 552 transitions, 7185 flow [2024-06-21 21:17:02,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7185, PETRI_PLACES=325, PETRI_TRANSITIONS=552} [2024-06-21 21:17:02,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 21:17:02,598 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 552 transitions, 7185 flow [2024-06-21 21:17:02,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:02,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:02,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:17:02,599 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:02,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash 838322432, now seen corresponding path program 8 times [2024-06-21 21:17:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:02,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860573213] [2024-06-21 21:17:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:02,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:03,615 INFO 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 21:17:03,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:03,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860573213] [2024-06-21 21:17:03,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860573213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:03,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:03,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:17:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087270515] [2024-06-21 21:17:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:03,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:17:03,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:03,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:17:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:17:03,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:03,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 552 transitions, 7185 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:03,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:03,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:03,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:04,781 INFO L124 PetriNetUnfolderBase]: 2633/4231 cut-off events. [2024-06-21 21:17:04,781 INFO L125 PetriNetUnfolderBase]: For 411811/411813 co-relation queries the response was YES. [2024-06-21 21:17:04,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39361 conditions, 4231 events. 2633/4231 cut-off events. For 411811/411813 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24611 event pairs, 448 based on Foata normal form. 4/4234 useless extension candidates. Maximal degree in co-relation 39204. Up to 3440 conditions per place. [2024-06-21 21:17:04,848 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 421 selfloop transitions, 142 changer transitions 0/568 dead transitions. [2024-06-21 21:17:04,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 568 transitions, 8634 flow [2024-06-21 21:17:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:17:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:17:04,858 INFO L175 Difference]: Start difference. First operand has 325 places, 552 transitions, 7185 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:17:04,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 568 transitions, 8634 flow [2024-06-21 21:17:06,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 568 transitions, 8437 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 21:17:06,397 INFO L231 Difference]: Finished difference. Result has 327 places, 556 transitions, 7418 flow [2024-06-21 21:17:06,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7418, PETRI_PLACES=327, PETRI_TRANSITIONS=556} [2024-06-21 21:17:06,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-21 21:17:06,398 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 556 transitions, 7418 flow [2024-06-21 21:17:06,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:06,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:06,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:06,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:17:06,402 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:06,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:06,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1553328030, now seen corresponding path program 14 times [2024-06-21 21:17:06,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:06,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378984199] [2024-06-21 21:17:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:06,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:07,074 INFO 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 21:17:07,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:07,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378984199] [2024-06-21 21:17:07,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378984199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:07,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:07,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:17:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451147456] [2024-06-21 21:17:07,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:17:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:17:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:17:07,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:07,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 556 transitions, 7418 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:07,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:07,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:07,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:08,185 INFO L124 PetriNetUnfolderBase]: 2820/4518 cut-off events. [2024-06-21 21:17:08,186 INFO L125 PetriNetUnfolderBase]: For 411521/411523 co-relation queries the response was YES. [2024-06-21 21:17:08,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41615 conditions, 4518 events. 2820/4518 cut-off events. For 411521/411523 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 26688 event pairs, 421 based on Foata normal form. 6/4523 useless extension candidates. Maximal degree in co-relation 41457. Up to 3683 conditions per place. [2024-06-21 21:17:08,250 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 480 selfloop transitions, 181 changer transitions 0/666 dead transitions. [2024-06-21 21:17:08,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 666 transitions, 10077 flow [2024-06-21 21:17:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:17:08,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 21:17:08,251 INFO L175 Difference]: Start difference. First operand has 327 places, 556 transitions, 7418 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:17:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 666 transitions, 10077 flow [2024-06-21 21:17:09,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 666 transitions, 9544 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:09,867 INFO L231 Difference]: Finished difference. Result has 332 places, 620 transitions, 8510 flow [2024-06-21 21:17:09,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6941, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8510, PETRI_PLACES=332, PETRI_TRANSITIONS=620} [2024-06-21 21:17:09,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-21 21:17:09,868 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 620 transitions, 8510 flow [2024-06-21 21:17:09,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:09,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:09,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:09,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:17:09,869 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:09,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:09,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1841170786, now seen corresponding path program 5 times [2024-06-21 21:17:09,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:09,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204962114] [2024-06-21 21:17:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:09,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:10,727 INFO 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 21:17:10,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204962114] [2024-06-21 21:17:10,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204962114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:10,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:10,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:10,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119183055] [2024-06-21 21:17:10,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:10,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:10,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:10,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:10,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:10,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 620 transitions, 8510 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:10,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:10,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:10,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:11,935 INFO L124 PetriNetUnfolderBase]: 2828/4531 cut-off events. [2024-06-21 21:17:11,935 INFO L125 PetriNetUnfolderBase]: For 407944/407944 co-relation queries the response was YES. [2024-06-21 21:17:11,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41674 conditions, 4531 events. 2828/4531 cut-off events. For 407944/407944 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 26722 event pairs, 458 based on Foata normal form. 2/4532 useless extension candidates. Maximal degree in co-relation 41513. Up to 4169 conditions per place. [2024-06-21 21:17:12,006 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 608 selfloop transitions, 40 changer transitions 0/653 dead transitions. [2024-06-21 21:17:12,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 653 transitions, 10091 flow [2024-06-21 21:17:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:17:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:17:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:17:12,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-21 21:17:12,007 INFO L175 Difference]: Start difference. First operand has 332 places, 620 transitions, 8510 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:17:12,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 653 transitions, 10091 flow [2024-06-21 21:17:13,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 653 transitions, 9697 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:17:13,763 INFO L231 Difference]: Finished difference. Result has 339 places, 632 transitions, 8481 flow [2024-06-21 21:17:13,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8120, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8481, PETRI_PLACES=339, PETRI_TRANSITIONS=632} [2024-06-21 21:17:13,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-21 21:17:13,764 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 632 transitions, 8481 flow [2024-06-21 21:17:13,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:13,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:13,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:13,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:17:13,765 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:13,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1822348016, now seen corresponding path program 1 times [2024-06-21 21:17:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899197020] [2024-06-21 21:17:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:14,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:14,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899197020] [2024-06-21 21:17:14,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899197020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:14,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:14,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:17:14,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663482534] [2024-06-21 21:17:14,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:14,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:17:14,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:14,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:17:14,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:17:14,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:17:14,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 632 transitions, 8481 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:14,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:14,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:17:14,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:15,677 INFO L124 PetriNetUnfolderBase]: 2682/4376 cut-off events. [2024-06-21 21:17:15,677 INFO L125 PetriNetUnfolderBase]: For 426632/426632 co-relation queries the response was YES. [2024-06-21 21:17:15,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40628 conditions, 4376 events. 2682/4376 cut-off events. For 426632/426632 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26512 event pairs, 424 based on Foata normal form. 4/4349 useless extension candidates. Maximal degree in co-relation 40462. Up to 3790 conditions per place. [2024-06-21 21:17:15,741 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 572 selfloop transitions, 19 changer transitions 0/655 dead transitions. [2024-06-21 21:17:15,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 655 transitions, 9775 flow [2024-06-21 21:17:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:17:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:17:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:17:15,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 21:17:15,744 INFO L175 Difference]: Start difference. First operand has 339 places, 632 transitions, 8481 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:17:15,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 655 transitions, 9775 flow [2024-06-21 21:17:17,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 655 transitions, 9571 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 21:17:17,416 INFO L231 Difference]: Finished difference. Result has 340 places, 634 transitions, 8366 flow [2024-06-21 21:17:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8366, PETRI_PLACES=340, PETRI_TRANSITIONS=634} [2024-06-21 21:17:17,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-21 21:17:17,418 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 634 transitions, 8366 flow [2024-06-21 21:17:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:17,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:17:17,418 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:17,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash -872390554, now seen corresponding path program 2 times [2024-06-21 21:17:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:17,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968292783] [2024-06-21 21:17:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968292783] [2024-06-21 21:17:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968292783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:18,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:17:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15034449] [2024-06-21 21:17:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:17:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:17:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:17:18,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:17:18,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 634 transitions, 8366 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:18,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:18,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:17:18,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:19,494 INFO L124 PetriNetUnfolderBase]: 2696/4398 cut-off events. [2024-06-21 21:17:19,495 INFO L125 PetriNetUnfolderBase]: For 432793/432793 co-relation queries the response was YES. [2024-06-21 21:17:19,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40763 conditions, 4398 events. 2696/4398 cut-off events. For 432793/432793 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26721 event pairs, 455 based on Foata normal form. 4/4371 useless extension candidates. Maximal degree in co-relation 40596. Up to 3821 conditions per place. [2024-06-21 21:17:19,572 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 567 selfloop transitions, 22 changer transitions 0/653 dead transitions. [2024-06-21 21:17:19,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 653 transitions, 9646 flow [2024-06-21 21:17:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:17:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:17:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:17:19,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:17:19,573 INFO L175 Difference]: Start difference. First operand has 340 places, 634 transitions, 8366 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:17:19,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 653 transitions, 9646 flow [2024-06-21 21:17:21,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 653 transitions, 9573 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:21,447 INFO L231 Difference]: Finished difference. Result has 342 places, 636 transitions, 8393 flow [2024-06-21 21:17:21,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8293, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8393, PETRI_PLACES=342, PETRI_TRANSITIONS=636} [2024-06-21 21:17:21,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-21 21:17:21,448 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 636 transitions, 8393 flow [2024-06-21 21:17:21,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:21,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:21,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:21,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:17:21,449 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:21,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1819486096, now seen corresponding path program 1 times [2024-06-21 21:17:21,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:21,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703712909] [2024-06-21 21:17:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:22,480 INFO 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 21:17:22,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:22,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703712909] [2024-06-21 21:17:22,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703712909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:22,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:22,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11571976] [2024-06-21 21:17:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:22,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:22,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:22,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 636 transitions, 8393 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:22,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:22,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:22,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:23,733 INFO L124 PetriNetUnfolderBase]: 2865/4587 cut-off events. [2024-06-21 21:17:23,733 INFO L125 PetriNetUnfolderBase]: For 429840/429840 co-relation queries the response was YES. [2024-06-21 21:17:23,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42030 conditions, 4587 events. 2865/4587 cut-off events. For 429840/429840 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27146 event pairs, 506 based on Foata normal form. 1/4587 useless extension candidates. Maximal degree in co-relation 41862. Up to 4244 conditions per place. [2024-06-21 21:17:23,815 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 627 selfloop transitions, 24 changer transitions 0/656 dead transitions. [2024-06-21 21:17:23,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 656 transitions, 9839 flow [2024-06-21 21:17:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:17:23,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:17:23,817 INFO L175 Difference]: Start difference. First operand has 342 places, 636 transitions, 8393 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:17:23,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 656 transitions, 9839 flow [2024-06-21 21:17:25,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 656 transitions, 9757 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:25,660 INFO L231 Difference]: Finished difference. Result has 345 places, 639 transitions, 8459 flow [2024-06-21 21:17:25,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8311, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8459, PETRI_PLACES=345, PETRI_TRANSITIONS=639} [2024-06-21 21:17:25,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-21 21:17:25,661 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 639 transitions, 8459 flow [2024-06-21 21:17:25,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:25,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:25,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:25,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:17:25,662 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:25,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1704199886, now seen corresponding path program 3 times [2024-06-21 21:17:25,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:25,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739379133] [2024-06-21 21:17:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:25,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739379133] [2024-06-21 21:17:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739379133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:26,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:26,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:17:26,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916640510] [2024-06-21 21:17:26,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:17:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:17:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:17:26,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:17:26,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 639 transitions, 8459 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:26,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:26,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:17:26,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:27,812 INFO L124 PetriNetUnfolderBase]: 2715/4429 cut-off events. [2024-06-21 21:17:27,812 INFO L125 PetriNetUnfolderBase]: For 452597/452597 co-relation queries the response was YES. [2024-06-21 21:17:27,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41440 conditions, 4429 events. 2715/4429 cut-off events. For 452597/452597 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 26944 event pairs, 454 based on Foata normal form. 4/4402 useless extension candidates. Maximal degree in co-relation 41271. Up to 3852 conditions per place. [2024-06-21 21:17:27,883 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 567 selfloop transitions, 24 changer transitions 0/655 dead transitions. [2024-06-21 21:17:27,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 655 transitions, 9737 flow [2024-06-21 21:17:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:17:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:17:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:17:27,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 21:17:27,884 INFO L175 Difference]: Start difference. First operand has 345 places, 639 transitions, 8459 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:17:27,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 655 transitions, 9737 flow [2024-06-21 21:17:29,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 655 transitions, 9569 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 21:17:29,911 INFO L231 Difference]: Finished difference. Result has 345 places, 641 transitions, 8401 flow [2024-06-21 21:17:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8291, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8401, PETRI_PLACES=345, PETRI_TRANSITIONS=641} [2024-06-21 21:17:29,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-21 21:17:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 641 transitions, 8401 flow [2024-06-21 21:17:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:29,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:29,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:17:29,912 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:29,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1704015436, now seen corresponding path program 2 times [2024-06-21 21:17:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388376836] [2024-06-21 21:17:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:30,856 INFO 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 21:17:30,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:30,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388376836] [2024-06-21 21:17:30,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388376836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:30,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:30,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:30,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772167440] [2024-06-21 21:17:30,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:30,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:30,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:30,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:30,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:30,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:30,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 641 transitions, 8401 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:30,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:30,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:30,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:32,105 INFO L124 PetriNetUnfolderBase]: 2894/4625 cut-off events. [2024-06-21 21:17:32,105 INFO L125 PetriNetUnfolderBase]: For 452572/452572 co-relation queries the response was YES. [2024-06-21 21:17:32,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42884 conditions, 4625 events. 2894/4625 cut-off events. For 452572/452572 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27351 event pairs, 508 based on Foata normal form. 1/4625 useless extension candidates. Maximal degree in co-relation 42715. Up to 4260 conditions per place. [2024-06-21 21:17:32,175 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 617 selfloop transitions, 41 changer transitions 0/663 dead transitions. [2024-06-21 21:17:32,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 663 transitions, 10102 flow [2024-06-21 21:17:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:17:32,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:17:32,177 INFO L175 Difference]: Start difference. First operand has 345 places, 641 transitions, 8401 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:17:32,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 663 transitions, 10102 flow [2024-06-21 21:17:34,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 663 transitions, 10009 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:34,166 INFO L231 Difference]: Finished difference. Result has 349 places, 647 transitions, 8579 flow [2024-06-21 21:17:34,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8308, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8579, PETRI_PLACES=349, PETRI_TRANSITIONS=647} [2024-06-21 21:17:34,167 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 21:17:34,167 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 647 transitions, 8579 flow [2024-06-21 21:17:34,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:34,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:34,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:17:34,167 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:34,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1704194926, now seen corresponding path program 3 times [2024-06-21 21:17:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062578190] [2024-06-21 21:17:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:35,139 INFO 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 21:17:35,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062578190] [2024-06-21 21:17:35,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062578190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:35,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:35,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741861967] [2024-06-21 21:17:35,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:35,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:35,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:35,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:35,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 647 transitions, 8579 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:35,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:35,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:35,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:36,450 INFO L124 PetriNetUnfolderBase]: 2904/4643 cut-off events. [2024-06-21 21:17:36,451 INFO L125 PetriNetUnfolderBase]: For 462864/462864 co-relation queries the response was YES. [2024-06-21 21:17:36,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43274 conditions, 4643 events. 2904/4643 cut-off events. For 462864/462864 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 27497 event pairs, 506 based on Foata normal form. 1/4643 useless extension candidates. Maximal degree in co-relation 43104. Up to 4301 conditions per place. [2024-06-21 21:17:36,525 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 633 selfloop transitions, 29 changer transitions 0/667 dead transitions. [2024-06-21 21:17:36,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 667 transitions, 10053 flow [2024-06-21 21:17:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:17:36,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:17:36,527 INFO L175 Difference]: Start difference. First operand has 349 places, 647 transitions, 8579 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:17:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 667 transitions, 10053 flow [2024-06-21 21:17:38,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 667 transitions, 9889 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:38,535 INFO L231 Difference]: Finished difference. Result has 352 places, 653 transitions, 8591 flow [2024-06-21 21:17:38,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8423, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8591, PETRI_PLACES=352, PETRI_TRANSITIONS=653} [2024-06-21 21:17:38,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 21:17:38,536 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 653 transitions, 8591 flow [2024-06-21 21:17:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:38,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:38,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:38,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:17:38,537 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:38,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:38,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1704015188, now seen corresponding path program 1 times [2024-06-21 21:17:38,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:38,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538134363] [2024-06-21 21:17:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:38,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:39,404 INFO 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 21:17:39,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:39,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538134363] [2024-06-21 21:17:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538134363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:39,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:17:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049322725] [2024-06-21 21:17:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:17:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:17:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:17:39,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:39,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 653 transitions, 8591 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:39,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:39,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:39,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:40,805 INFO L124 PetriNetUnfolderBase]: 2912/4655 cut-off events. [2024-06-21 21:17:40,806 INFO L125 PetriNetUnfolderBase]: For 476162/476162 co-relation queries the response was YES. [2024-06-21 21:17:40,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43409 conditions, 4655 events. 2912/4655 cut-off events. For 476162/476162 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27550 event pairs, 508 based on Foata normal form. 2/4656 useless extension candidates. Maximal degree in co-relation 43238. Up to 4316 conditions per place. [2024-06-21 21:17:40,878 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 642 selfloop transitions, 23 changer transitions 0/670 dead transitions. [2024-06-21 21:17:40,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 670 transitions, 10025 flow [2024-06-21 21:17:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:17:40,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 21:17:40,880 INFO L175 Difference]: Start difference. First operand has 352 places, 653 transitions, 8591 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:17:40,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 670 transitions, 10025 flow [2024-06-21 21:17:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 670 transitions, 9920 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:17:42,542 INFO L231 Difference]: Finished difference. Result has 354 places, 655 transitions, 8599 flow [2024-06-21 21:17:42,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8486, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8599, PETRI_PLACES=354, PETRI_TRANSITIONS=655} [2024-06-21 21:17:42,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 21:17:42,543 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 655 transitions, 8599 flow [2024-06-21 21:17:42,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:42,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:42,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:17:42,546 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:42,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash 788320884, now seen corresponding path program 4 times [2024-06-21 21:17:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:42,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050909186] [2024-06-21 21:17:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:43,487 INFO 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 21:17:43,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:43,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050909186] [2024-06-21 21:17:43,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050909186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:43,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:43,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:43,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157374975] [2024-06-21 21:17:43,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:43,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:43,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:43,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:43,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 655 transitions, 8599 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:43,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:43,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:43,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:44,844 INFO L124 PetriNetUnfolderBase]: 2909/4645 cut-off events. [2024-06-21 21:17:44,844 INFO L125 PetriNetUnfolderBase]: For 478479/478479 co-relation queries the response was YES. [2024-06-21 21:17:44,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43455 conditions, 4645 events. 2909/4645 cut-off events. For 478479/478479 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27420 event pairs, 508 based on Foata normal form. 1/4645 useless extension candidates. Maximal degree in co-relation 43284. Up to 4291 conditions per place. [2024-06-21 21:17:44,914 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 629 selfloop transitions, 36 changer transitions 0/670 dead transitions. [2024-06-21 21:17:44,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 670 transitions, 9979 flow [2024-06-21 21:17:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:17:44,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:17:44,915 INFO L175 Difference]: Start difference. First operand has 354 places, 655 transitions, 8599 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:17:44,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 670 transitions, 9979 flow [2024-06-21 21:17:46,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 670 transitions, 9842 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 21:17:46,639 INFO L231 Difference]: Finished difference. Result has 356 places, 655 transitions, 8540 flow [2024-06-21 21:17:46,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8540, PETRI_PLACES=356, PETRI_TRANSITIONS=655} [2024-06-21 21:17:46,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 21:17:46,640 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 655 transitions, 8540 flow [2024-06-21 21:17:46,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:46,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:46,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:46,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:17:46,640 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:46,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash -867435386, now seen corresponding path program 4 times [2024-06-21 21:17:46,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:46,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514320159] [2024-06-21 21:17:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:47,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:47,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514320159] [2024-06-21 21:17:47,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514320159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:47,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:47,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:17:47,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364784603] [2024-06-21 21:17:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:47,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:17:47,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:17:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:17:47,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:17:47,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 655 transitions, 8540 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:47,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:47,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:17:47,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:48,892 INFO L124 PetriNetUnfolderBase]: 2733/4455 cut-off events. [2024-06-21 21:17:48,892 INFO L125 PetriNetUnfolderBase]: For 484460/484462 co-relation queries the response was YES. [2024-06-21 21:17:48,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41904 conditions, 4455 events. 2733/4455 cut-off events. For 484460/484462 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27111 event pairs, 453 based on Foata normal form. 6/4430 useless extension candidates. Maximal degree in co-relation 41732. Up to 3860 conditions per place. [2024-06-21 21:17:48,956 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 560 selfloop transitions, 45 changer transitions 0/669 dead transitions. [2024-06-21 21:17:48,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 669 transitions, 9848 flow [2024-06-21 21:17:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:17:48,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:17:48,958 INFO L175 Difference]: Start difference. First operand has 356 places, 655 transitions, 8540 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:17:48,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 669 transitions, 9848 flow [2024-06-21 21:17:51,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 669 transitions, 9748 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:17:51,142 INFO L231 Difference]: Finished difference. Result has 357 places, 657 transitions, 8601 flow [2024-06-21 21:17:51,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8440, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8601, PETRI_PLACES=357, PETRI_TRANSITIONS=657} [2024-06-21 21:17:51,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-21 21:17:51,143 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 657 transitions, 8601 flow [2024-06-21 21:17:51,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:51,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:51,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:51,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:17:51,144 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:51,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1251826100, now seen corresponding path program 5 times [2024-06-21 21:17:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:51,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821697951] [2024-06-21 21:17:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:52,044 INFO 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 21:17:52,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:52,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821697951] [2024-06-21 21:17:52,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821697951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:52,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:52,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:52,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736218540] [2024-06-21 21:17:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:52,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:52,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:52,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:52,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:52,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 657 transitions, 8601 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:52,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:52,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:52,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:53,257 INFO L124 PetriNetUnfolderBase]: 2909/4649 cut-off events. [2024-06-21 21:17:53,257 INFO L125 PetriNetUnfolderBase]: For 484982/484982 co-relation queries the response was YES. [2024-06-21 21:17:53,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43294 conditions, 4649 events. 2909/4649 cut-off events. For 484982/484982 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 27518 event pairs, 511 based on Foata normal form. 1/4648 useless extension candidates. Maximal degree in co-relation 43121. Up to 4225 conditions per place. [2024-06-21 21:17:53,447 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 591 selfloop transitions, 84 changer transitions 0/680 dead transitions. [2024-06-21 21:17:53,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 680 transitions, 10415 flow [2024-06-21 21:17:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:17:53,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 21:17:53,448 INFO L175 Difference]: Start difference. First operand has 357 places, 657 transitions, 8601 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:17:53,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 680 transitions, 10415 flow [2024-06-21 21:17:55,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 680 transitions, 10262 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:55,226 INFO L231 Difference]: Finished difference. Result has 361 places, 666 transitions, 8866 flow [2024-06-21 21:17:55,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8449, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8866, PETRI_PLACES=361, PETRI_TRANSITIONS=666} [2024-06-21 21:17:55,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-21 21:17:55,227 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 666 transitions, 8866 flow [2024-06-21 21:17:55,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:55,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:55,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:17:55,227 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:55,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1021906850, now seen corresponding path program 6 times [2024-06-21 21:17:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397342487] [2024-06-21 21:17:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:56,327 INFO 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 21:17:56,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397342487] [2024-06-21 21:17:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397342487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:56,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:56,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:56,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510925688] [2024-06-21 21:17:56,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:56,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:56,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:56,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:56,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:17:56,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 666 transitions, 8866 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:56,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:56,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:17:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:57,666 INFO L124 PetriNetUnfolderBase]: 2914/4664 cut-off events. [2024-06-21 21:17:57,666 INFO L125 PetriNetUnfolderBase]: For 496653/496655 co-relation queries the response was YES. [2024-06-21 21:17:57,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43572 conditions, 4664 events. 2914/4664 cut-off events. For 496653/496655 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27724 event pairs, 505 based on Foata normal form. 3/4666 useless extension candidates. Maximal degree in co-relation 43398. Up to 4284 conditions per place. [2024-06-21 21:17:57,859 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 626 selfloop transitions, 52 changer transitions 0/683 dead transitions. [2024-06-21 21:17:57,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 683 transitions, 10382 flow [2024-06-21 21:17:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:17:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:17:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:17:57,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:17:57,860 INFO L175 Difference]: Start difference. First operand has 361 places, 666 transitions, 8866 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:17:57,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 683 transitions, 10382 flow [2024-06-21 21:18:00,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 683 transitions, 10178 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-21 21:18:00,012 INFO L231 Difference]: Finished difference. Result has 367 places, 670 transitions, 8904 flow [2024-06-21 21:18:00,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8674, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8904, PETRI_PLACES=367, PETRI_TRANSITIONS=670} [2024-06-21 21:18:00,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-21 21:18:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 670 transitions, 8904 flow [2024-06-21 21:18:00,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:00,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:00,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:00,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:18:00,014 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:00,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1532119944, now seen corresponding path program 2 times [2024-06-21 21:18:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:00,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226169965] [2024-06-21 21:18:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:00,956 INFO 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 21:18:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226169965] [2024-06-21 21:18:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226169965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:00,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:00,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:18:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383195916] [2024-06-21 21:18:00,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:18:00,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:18:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:18:01,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:01,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 670 transitions, 8904 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:01,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:01,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:01,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:02,314 INFO L124 PetriNetUnfolderBase]: 2922/4674 cut-off events. [2024-06-21 21:18:02,314 INFO L125 PetriNetUnfolderBase]: For 506989/506991 co-relation queries the response was YES. [2024-06-21 21:18:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43527 conditions, 4674 events. 2922/4674 cut-off events. For 506989/506991 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27782 event pairs, 509 based on Foata normal form. 4/4677 useless extension candidates. Maximal degree in co-relation 43351. Up to 4316 conditions per place. [2024-06-21 21:18:02,393 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 646 selfloop transitions, 36 changer transitions 0/687 dead transitions. [2024-06-21 21:18:02,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 687 transitions, 10391 flow [2024-06-21 21:18:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:18:02,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 21:18:02,394 INFO L175 Difference]: Start difference. First operand has 367 places, 670 transitions, 8904 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:18:02,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 687 transitions, 10391 flow [2024-06-21 21:18:04,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 687 transitions, 10187 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 21:18:04,424 INFO L231 Difference]: Finished difference. Result has 369 places, 674 transitions, 8872 flow [2024-06-21 21:18:04,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8704, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8872, PETRI_PLACES=369, PETRI_TRANSITIONS=674} [2024-06-21 21:18:04,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 21:18:04,425 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 674 transitions, 8872 flow [2024-06-21 21:18:04,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:04,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:04,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:04,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:18:04,426 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:04,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1251834718, now seen corresponding path program 3 times [2024-06-21 21:18:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661918253] [2024-06-21 21:18:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:05,464 INFO 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 21:18:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661918253] [2024-06-21 21:18:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661918253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:05,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419753653] [2024-06-21 21:18:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:05,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:05,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:05,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:05,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 674 transitions, 8872 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:05,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:05,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:05,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:07,025 INFO L124 PetriNetUnfolderBase]: 2992/4780 cut-off events. [2024-06-21 21:18:07,026 INFO L125 PetriNetUnfolderBase]: For 555624/555626 co-relation queries the response was YES. [2024-06-21 21:18:07,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45369 conditions, 4780 events. 2992/4780 cut-off events. For 555624/555626 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28455 event pairs, 523 based on Foata normal form. 4/4783 useless extension candidates. Maximal degree in co-relation 45192. Up to 4258 conditions per place. [2024-06-21 21:18:07,134 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 615 selfloop transitions, 81 changer transitions 0/701 dead transitions. [2024-06-21 21:18:07,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 701 transitions, 10908 flow [2024-06-21 21:18:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:18:07,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:18:07,136 INFO L175 Difference]: Start difference. First operand has 369 places, 674 transitions, 8872 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:18:07,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 701 transitions, 10908 flow [2024-06-21 21:18:09,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 701 transitions, 10790 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:18:09,216 INFO L231 Difference]: Finished difference. Result has 373 places, 680 transitions, 9096 flow [2024-06-21 21:18:09,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8754, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9096, PETRI_PLACES=373, PETRI_TRANSITIONS=680} [2024-06-21 21:18:09,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 21:18:09,217 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 680 transitions, 9096 flow [2024-06-21 21:18:09,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:18:09,218 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:09,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash 953787038, now seen corresponding path program 7 times [2024-06-21 21:18:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738510763] [2024-06-21 21:18:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:10,260 INFO 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 21:18:10,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:10,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738510763] [2024-06-21 21:18:10,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738510763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:10,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:10,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:10,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955283795] [2024-06-21 21:18:10,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:10,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:10,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:10,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:10,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 680 transitions, 9096 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:10,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:10,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:10,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:11,630 INFO L124 PetriNetUnfolderBase]: 3002/4796 cut-off events. [2024-06-21 21:18:11,631 INFO L125 PetriNetUnfolderBase]: For 563650/563652 co-relation queries the response was YES. [2024-06-21 21:18:11,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 4796 events. 3002/4796 cut-off events. For 563650/563652 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 28591 event pairs, 527 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 45668. Up to 4421 conditions per place. [2024-06-21 21:18:11,707 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 643 selfloop transitions, 50 changer transitions 0/698 dead transitions. [2024-06-21 21:18:11,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 698 transitions, 10640 flow [2024-06-21 21:18:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:18:11,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:18:11,709 INFO L175 Difference]: Start difference. First operand has 373 places, 680 transitions, 9096 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:18:11,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 698 transitions, 10640 flow [2024-06-21 21:18:14,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 698 transitions, 10399 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 21:18:14,191 INFO L231 Difference]: Finished difference. Result has 374 places, 686 transitions, 9087 flow [2024-06-21 21:18:14,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8866, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9087, PETRI_PLACES=374, PETRI_TRANSITIONS=686} [2024-06-21 21:18:14,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-21 21:18:14,192 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 686 transitions, 9087 flow [2024-06-21 21:18:14,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:14,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:14,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:18:14,192 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:14,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 628659812, now seen corresponding path program 4 times [2024-06-21 21:18:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:14,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958163914] [2024-06-21 21:18:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:15,203 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 21:18:15,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:15,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958163914] [2024-06-21 21:18:15,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958163914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:15,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:15,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862205413] [2024-06-21 21:18:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:15,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:15,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:15,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 686 transitions, 9087 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:15,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:15,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:16,568 INFO L124 PetriNetUnfolderBase]: 3046/4864 cut-off events. [2024-06-21 21:18:16,568 INFO L125 PetriNetUnfolderBase]: For 614582/614584 co-relation queries the response was YES. [2024-06-21 21:18:16,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46222 conditions, 4864 events. 3046/4864 cut-off events. For 614582/614584 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29047 event pairs, 531 based on Foata normal form. 12/4875 useless extension candidates. Maximal degree in co-relation 46045. Up to 4407 conditions per place. [2024-06-21 21:18:16,653 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 621 selfloop transitions, 82 changer transitions 0/708 dead transitions. [2024-06-21 21:18:16,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 708 transitions, 10872 flow [2024-06-21 21:18:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:18:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:18:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:18:16,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 21:18:16,656 INFO L175 Difference]: Start difference. First operand has 374 places, 686 transitions, 9087 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:18:16,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 708 transitions, 10872 flow [2024-06-21 21:18:18,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 708 transitions, 10716 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:18:18,725 INFO L231 Difference]: Finished difference. Result has 377 places, 689 transitions, 9180 flow [2024-06-21 21:18:18,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8931, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9180, PETRI_PLACES=377, PETRI_TRANSITIONS=689} [2024-06-21 21:18:18,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 21:18:18,726 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 689 transitions, 9180 flow [2024-06-21 21:18:18,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:18,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:18,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:18,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:18:18,726 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:18,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:18,727 INFO L85 PathProgramCache]: Analyzing trace with hash -867257446, now seen corresponding path program 8 times [2024-06-21 21:18:18,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:18,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394362492] [2024-06-21 21:18:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:18,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:19,828 INFO 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 21:18:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394362492] [2024-06-21 21:18:19,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394362492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:19,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313022306] [2024-06-21 21:18:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:19,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:19,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:19,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 689 transitions, 9180 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:19,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:19,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:19,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:21,224 INFO L124 PetriNetUnfolderBase]: 3043/4860 cut-off events. [2024-06-21 21:18:21,224 INFO L125 PetriNetUnfolderBase]: For 580504/580504 co-relation queries the response was YES. [2024-06-21 21:18:21,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46291 conditions, 4860 events. 3043/4860 cut-off events. For 580504/580504 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29046 event pairs, 535 based on Foata normal form. 1/4859 useless extension candidates. Maximal degree in co-relation 46114. Up to 4467 conditions per place. [2024-06-21 21:18:21,325 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 641 selfloop transitions, 55 changer transitions 0/701 dead transitions. [2024-06-21 21:18:21,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 701 transitions, 10610 flow [2024-06-21 21:18:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:18:21,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:18:21,327 INFO L175 Difference]: Start difference. First operand has 377 places, 689 transitions, 9180 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:18:21,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 701 transitions, 10610 flow [2024-06-21 21:18:23,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 701 transitions, 10402 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 21:18:23,851 INFO L231 Difference]: Finished difference. Result has 378 places, 689 transitions, 9088 flow [2024-06-21 21:18:23,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8972, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9088, PETRI_PLACES=378, PETRI_TRANSITIONS=689} [2024-06-21 21:18:23,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 21:18:23,852 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 689 transitions, 9088 flow [2024-06-21 21:18:23,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:23,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:18:23,853 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:23,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash -867250936, now seen corresponding path program 9 times [2024-06-21 21:18:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:23,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47186067] [2024-06-21 21:18:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:24,729 INFO 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 21:18:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47186067] [2024-06-21 21:18:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47186067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:24,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:24,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:24,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008961138] [2024-06-21 21:18:24,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:24,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:24,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:24,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:24,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:24,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 689 transitions, 9088 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:24,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:24,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:24,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:25,964 INFO L124 PetriNetUnfolderBase]: 3040/4852 cut-off events. [2024-06-21 21:18:25,964 INFO L125 PetriNetUnfolderBase]: For 583513/583513 co-relation queries the response was YES. [2024-06-21 21:18:26,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45975 conditions, 4852 events. 3040/4852 cut-off events. For 583513/583513 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 28934 event pairs, 533 based on Foata normal form. 1/4851 useless extension candidates. Maximal degree in co-relation 45797. Up to 4454 conditions per place. [2024-06-21 21:18:26,049 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 633 selfloop transitions, 63 changer transitions 0/701 dead transitions. [2024-06-21 21:18:26,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 701 transitions, 10518 flow [2024-06-21 21:18:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:18:26,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 21:18:26,052 INFO L175 Difference]: Start difference. First operand has 378 places, 689 transitions, 9088 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:18:26,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 701 transitions, 10518 flow [2024-06-21 21:18:28,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 701 transitions, 10280 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-21 21:18:28,059 INFO L231 Difference]: Finished difference. Result has 378 places, 689 transitions, 8982 flow [2024-06-21 21:18:28,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8850, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8982, PETRI_PLACES=378, PETRI_TRANSITIONS=689} [2024-06-21 21:18:28,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 21:18:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 689 transitions, 8982 flow [2024-06-21 21:18:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:28,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:28,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:28,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:18:28,060 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:28,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash -867250688, now seen corresponding path program 5 times [2024-06-21 21:18:28,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:28,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127722574] [2024-06-21 21:18:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:28,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:28,926 INFO 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 21:18:28,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:28,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127722574] [2024-06-21 21:18:28,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127722574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:28,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:28,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:18:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288576393] [2024-06-21 21:18:28,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:28,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:18:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:18:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:18:29,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:29,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 689 transitions, 8982 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:29,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:29,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:29,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:30,196 INFO L124 PetriNetUnfolderBase]: 3035/4851 cut-off events. [2024-06-21 21:18:30,197 INFO L125 PetriNetUnfolderBase]: For 588206/588208 co-relation queries the response was YES. [2024-06-21 21:18:30,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45716 conditions, 4851 events. 3035/4851 cut-off events. For 588206/588208 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28965 event pairs, 528 based on Foata normal form. 4/4854 useless extension candidates. Maximal degree in co-relation 45538. Up to 4489 conditions per place. [2024-06-21 21:18:30,273 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 663 selfloop transitions, 35 changer transitions 0/703 dead transitions. [2024-06-21 21:18:30,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 703 transitions, 10461 flow [2024-06-21 21:18:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:18:30,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 21:18:30,275 INFO L175 Difference]: Start difference. First operand has 378 places, 689 transitions, 8982 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:18:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 703 transitions, 10461 flow [2024-06-21 21:18:32,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 703 transitions, 10200 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 21:18:32,555 INFO L231 Difference]: Finished difference. Result has 378 places, 690 transitions, 8841 flow [2024-06-21 21:18:32,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8721, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8841, PETRI_PLACES=378, PETRI_TRANSITIONS=690} [2024-06-21 21:18:32,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 21:18:32,556 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 690 transitions, 8841 flow [2024-06-21 21:18:32,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:32,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:32,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:32,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:18:32,557 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:32,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2104758868, now seen corresponding path program 1 times [2024-06-21 21:18:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:32,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885891636] [2024-06-21 21:18:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885891636] [2024-06-21 21:18:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885891636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:33,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:18:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655744737] [2024-06-21 21:18:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:18:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:18:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:18:33,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:33,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 690 transitions, 8841 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:33,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:33,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:33,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:34,698 INFO L124 PetriNetUnfolderBase]: 3051/4873 cut-off events. [2024-06-21 21:18:34,698 INFO L125 PetriNetUnfolderBase]: For 593695/593695 co-relation queries the response was YES. [2024-06-21 21:18:34,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45820 conditions, 4873 events. 3051/4873 cut-off events. For 593695/593695 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29089 event pairs, 440 based on Foata normal form. 1/4872 useless extension candidates. Maximal degree in co-relation 45642. Up to 4256 conditions per place. [2024-06-21 21:18:34,771 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 646 selfloop transitions, 67 changer transitions 0/718 dead transitions. [2024-06-21 21:18:34,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 718 transitions, 10463 flow [2024-06-21 21:18:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:18:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:18:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:18:34,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 21:18:34,772 INFO L175 Difference]: Start difference. First operand has 378 places, 690 transitions, 8841 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:18:34,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 718 transitions, 10463 flow [2024-06-21 21:18:37,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 718 transitions, 10342 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:18:37,065 INFO L231 Difference]: Finished difference. Result has 379 places, 696 transitions, 8984 flow [2024-06-21 21:18:37,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8720, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8984, PETRI_PLACES=379, PETRI_TRANSITIONS=696} [2024-06-21 21:18:37,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 21:18:37,065 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 696 transitions, 8984 flow [2024-06-21 21:18:37,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:37,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:37,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:37,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:18:37,066 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:37,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -660021864, now seen corresponding path program 2 times [2024-06-21 21:18:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:37,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76446113] [2024-06-21 21:18:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:37,791 INFO 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 21:18:37,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:37,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76446113] [2024-06-21 21:18:37,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76446113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:37,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:37,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:18:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096177836] [2024-06-21 21:18:37,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:18:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:18:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:18:37,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:37,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 696 transitions, 8984 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:37,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:37,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:37,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:39,203 INFO L124 PetriNetUnfolderBase]: 3064/4899 cut-off events. [2024-06-21 21:18:39,204 INFO L125 PetriNetUnfolderBase]: For 613275/613275 co-relation queries the response was YES. [2024-06-21 21:18:39,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46704 conditions, 4899 events. 3064/4899 cut-off events. For 613275/613275 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29340 event pairs, 440 based on Foata normal form. 1/4898 useless extension candidates. Maximal degree in co-relation 46525. Up to 4256 conditions per place. [2024-06-21 21:18:39,275 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 639 selfloop transitions, 78 changer transitions 0/722 dead transitions. [2024-06-21 21:18:39,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 722 transitions, 10874 flow [2024-06-21 21:18:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:18:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:18:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:18:39,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:18:39,277 INFO L175 Difference]: Start difference. First operand has 379 places, 696 transitions, 8984 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:18:39,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 722 transitions, 10874 flow [2024-06-21 21:18:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 722 transitions, 10668 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 21:18:42,013 INFO L231 Difference]: Finished difference. Result has 382 places, 702 transitions, 9131 flow [2024-06-21 21:18:42,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8778, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9131, PETRI_PLACES=382, PETRI_TRANSITIONS=702} [2024-06-21 21:18:42,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-21 21:18:42,014 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 702 transitions, 9131 flow [2024-06-21 21:18:42,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:42,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:42,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:18:42,014 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:42,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2110121248, now seen corresponding path program 3 times [2024-06-21 21:18:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:42,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752495777] [2024-06-21 21:18:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:42,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752495777] [2024-06-21 21:18:42,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752495777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:42,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:42,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:18:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593465872] [2024-06-21 21:18:42,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:18:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:18:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:18:42,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 702 transitions, 9131 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:42,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:44,111 INFO L124 PetriNetUnfolderBase]: 3061/4899 cut-off events. [2024-06-21 21:18:44,111 INFO L125 PetriNetUnfolderBase]: For 622132/622132 co-relation queries the response was YES. [2024-06-21 21:18:44,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46944 conditions, 4899 events. 3061/4899 cut-off events. For 622132/622132 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29415 event pairs, 448 based on Foata normal form. 1/4898 useless extension candidates. Maximal degree in co-relation 46764. Up to 4270 conditions per place. [2024-06-21 21:18:44,190 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 646 selfloop transitions, 75 changer transitions 0/726 dead transitions. [2024-06-21 21:18:44,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 726 transitions, 10657 flow [2024-06-21 21:18:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:18:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:18:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:18:44,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 21:18:44,192 INFO L175 Difference]: Start difference. First operand has 382 places, 702 transitions, 9131 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:18:44,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 726 transitions, 10657 flow [2024-06-21 21:18:47,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 726 transitions, 10424 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:47,208 INFO L231 Difference]: Finished difference. Result has 386 places, 702 transitions, 9054 flow [2024-06-21 21:18:47,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8898, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9054, PETRI_PLACES=386, PETRI_TRANSITIONS=702} [2024-06-21 21:18:47,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-21 21:18:47,209 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 702 transitions, 9054 flow [2024-06-21 21:18:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:47,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:47,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:18:47,210 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:47,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1992854978, now seen corresponding path program 1 times [2024-06-21 21:18:47,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:47,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980834887] [2024-06-21 21:18:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:47,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:47,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980834887] [2024-06-21 21:18:47,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980834887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:47,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:47,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:47,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549722368] [2024-06-21 21:18:47,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:48,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:48,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 702 transitions, 9054 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:48,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:48,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:48,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:49,482 INFO L124 PetriNetUnfolderBase]: 3071/4907 cut-off events. [2024-06-21 21:18:49,482 INFO L125 PetriNetUnfolderBase]: For 638232/638232 co-relation queries the response was YES. [2024-06-21 21:18:49,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47336 conditions, 4907 events. 3071/4907 cut-off events. For 638232/638232 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 29370 event pairs, 440 based on Foata normal form. 2/4907 useless extension candidates. Maximal degree in co-relation 47154. Up to 4275 conditions per place. [2024-06-21 21:18:49,565 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 648 selfloop transitions, 76 changer transitions 0/729 dead transitions. [2024-06-21 21:18:49,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 729 transitions, 10736 flow [2024-06-21 21:18:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:18:49,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-21 21:18:49,566 INFO L175 Difference]: Start difference. First operand has 386 places, 702 transitions, 9054 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:18:49,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 729 transitions, 10736 flow [2024-06-21 21:18:53,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 729 transitions, 10540 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:18:53,251 INFO L231 Difference]: Finished difference. Result has 388 places, 706 transitions, 9175 flow [2024-06-21 21:18:53,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8858, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9175, PETRI_PLACES=388, PETRI_TRANSITIONS=706} [2024-06-21 21:18:53,252 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 21:18:53,252 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 706 transitions, 9175 flow [2024-06-21 21:18:53,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:53,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:53,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:18:53,253 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:53,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2100735099, now seen corresponding path program 1 times [2024-06-21 21:18:53,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:53,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572638708] [2024-06-21 21:18:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:53,974 INFO 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 21:18:53,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572638708] [2024-06-21 21:18:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572638708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:53,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:53,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853667539] [2024-06-21 21:18:53,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:53,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:53,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:54,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:54,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 706 transitions, 9175 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:54,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:54,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:54,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:55,389 INFO L124 PetriNetUnfolderBase]: 3081/4923 cut-off events. [2024-06-21 21:18:55,389 INFO L125 PetriNetUnfolderBase]: For 646482/646484 co-relation queries the response was YES. [2024-06-21 21:18:55,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47903 conditions, 4923 events. 3081/4923 cut-off events. For 646482/646484 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 29425 event pairs, 428 based on Foata normal form. 4/4926 useless extension candidates. Maximal degree in co-relation 47720. Up to 4353 conditions per place. [2024-06-21 21:18:55,469 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 643 selfloop transitions, 84 changer transitions 0/732 dead transitions. [2024-06-21 21:18:55,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 732 transitions, 10805 flow [2024-06-21 21:18:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:18:55,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:18:55,470 INFO L175 Difference]: Start difference. First operand has 388 places, 706 transitions, 9175 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:18:55,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 732 transitions, 10805 flow [2024-06-21 21:18:58,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 732 transitions, 10516 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 21:18:58,961 INFO L231 Difference]: Finished difference. Result has 392 places, 712 transitions, 9213 flow [2024-06-21 21:18:58,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8886, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9213, PETRI_PLACES=392, PETRI_TRANSITIONS=712} [2024-06-21 21:18:58,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-21 21:18:58,961 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 712 transitions, 9213 flow [2024-06-21 21:18:58,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:58,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:58,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:58,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:18:58,962 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:58,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -904625275, now seen corresponding path program 2 times [2024-06-21 21:18:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:58,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765329212] [2024-06-21 21:18:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:58,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:59,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765329212] [2024-06-21 21:18:59,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765329212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:59,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:59,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:18:59,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237583619] [2024-06-21 21:18:59,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:59,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:18:59,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:59,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:18:59,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:18:59,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:18:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 712 transitions, 9213 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:18:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:01,129 INFO L124 PetriNetUnfolderBase]: 3091/4939 cut-off events. [2024-06-21 21:19:01,130 INFO L125 PetriNetUnfolderBase]: For 659483/659485 co-relation queries the response was YES. [2024-06-21 21:19:01,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48169 conditions, 4939 events. 3091/4939 cut-off events. For 659483/659485 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29567 event pairs, 432 based on Foata normal form. 4/4942 useless extension candidates. Maximal degree in co-relation 47983. Up to 4142 conditions per place. [2024-06-21 21:19:01,210 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 589 selfloop transitions, 142 changer transitions 0/736 dead transitions. [2024-06-21 21:19:01,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 736 transitions, 10860 flow [2024-06-21 21:19:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:19:01,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:19:01,211 INFO L175 Difference]: Start difference. First operand has 392 places, 712 transitions, 9213 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:19:01,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 736 transitions, 10860 flow [2024-06-21 21:19:05,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 736 transitions, 10669 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:05,223 INFO L231 Difference]: Finished difference. Result has 396 places, 719 transitions, 9452 flow [2024-06-21 21:19:05,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9022, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9452, PETRI_PLACES=396, PETRI_TRANSITIONS=719} [2024-06-21 21:19:05,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 21:19:05,224 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 719 transitions, 9452 flow [2024-06-21 21:19:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:05,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:19:05,225 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:05,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1870366161, now seen corresponding path program 3 times [2024-06-21 21:19:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:05,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195389861] [2024-06-21 21:19:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:06,222 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 21:19:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:06,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195389861] [2024-06-21 21:19:06,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195389861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:06,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:06,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:19:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400646487] [2024-06-21 21:19:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:06,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:19:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:19:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:19:06,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:06,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 719 transitions, 9452 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:06,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:06,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:06,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:07,635 INFO L124 PetriNetUnfolderBase]: 3119/4982 cut-off events. [2024-06-21 21:19:07,636 INFO L125 PetriNetUnfolderBase]: For 694350/694352 co-relation queries the response was YES. [2024-06-21 21:19:07,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49255 conditions, 4982 events. 3119/4982 cut-off events. For 694350/694352 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 29812 event pairs, 432 based on Foata normal form. 6/4987 useless extension candidates. Maximal degree in co-relation 49068. Up to 3736 conditions per place. [2024-06-21 21:19:07,728 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 459 selfloop transitions, 285 changer transitions 0/749 dead transitions. [2024-06-21 21:19:07,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 749 transitions, 11618 flow [2024-06-21 21:19:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 21:19:07,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 21:19:07,730 INFO L175 Difference]: Start difference. First operand has 396 places, 719 transitions, 9452 flow. Second operand 10 states and 182 transitions. [2024-06-21 21:19:07,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 749 transitions, 11618 flow [2024-06-21 21:19:11,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 749 transitions, 11393 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:11,315 INFO L231 Difference]: Finished difference. Result has 402 places, 729 transitions, 10178 flow [2024-06-21 21:19:11,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9227, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10178, PETRI_PLACES=402, PETRI_TRANSITIONS=729} [2024-06-21 21:19:11,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 21:19:11,316 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 729 transitions, 10178 flow [2024-06-21 21:19:11,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:11,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:11,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:11,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:19:11,317 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:11,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1477718082, now seen corresponding path program 1 times [2024-06-21 21:19:11,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:11,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506100669] [2024-06-21 21:19:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:11,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506100669] [2024-06-21 21:19:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506100669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:12,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:12,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402590065] [2024-06-21 21:19:12,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:12,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:12,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:12,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:12,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:12,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 729 transitions, 10178 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:12,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:12,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:12,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:13,602 INFO L124 PetriNetUnfolderBase]: 3155/5044 cut-off events. [2024-06-21 21:19:13,602 INFO L125 PetriNetUnfolderBase]: For 751281/751283 co-relation queries the response was YES. [2024-06-21 21:19:13,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50698 conditions, 5044 events. 3155/5044 cut-off events. For 751281/751283 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30345 event pairs, 337 based on Foata normal form. 12/5055 useless extension candidates. Maximal degree in co-relation 50510. Up to 4375 conditions per place. [2024-06-21 21:19:13,697 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 693 selfloop transitions, 67 changer transitions 0/765 dead transitions. [2024-06-21 21:19:13,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 765 transitions, 12030 flow [2024-06-21 21:19:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:19:13,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 21:19:13,699 INFO L175 Difference]: Start difference. First operand has 402 places, 729 transitions, 10178 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:19:13,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 765 transitions, 12030 flow [2024-06-21 21:19:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 765 transitions, 11458 flow, removed 128 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:17,368 INFO L231 Difference]: Finished difference. Result has 405 places, 731 transitions, 9853 flow [2024-06-21 21:19:17,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9606, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9853, PETRI_PLACES=405, PETRI_TRANSITIONS=731} [2024-06-21 21:19:17,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-21 21:19:17,369 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 731 transitions, 9853 flow [2024-06-21 21:19:17,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:17,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:17,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:17,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:19:17,370 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:17,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1211694372, now seen corresponding path program 2 times [2024-06-21 21:19:17,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:17,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487292956] [2024-06-21 21:19:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:17,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:18,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:18,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487292956] [2024-06-21 21:19:18,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487292956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:18,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:18,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:18,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846092663] [2024-06-21 21:19:18,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:18,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:18,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 731 transitions, 9853 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:18,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:18,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:18,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:19,704 INFO L124 PetriNetUnfolderBase]: 3199/5118 cut-off events. [2024-06-21 21:19:19,705 INFO L125 PetriNetUnfolderBase]: For 775364/775366 co-relation queries the response was YES. [2024-06-21 21:19:19,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51447 conditions, 5118 events. 3199/5118 cut-off events. For 775364/775366 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30853 event pairs, 457 based on Foata normal form. 14/5131 useless extension candidates. Maximal degree in co-relation 51257. Up to 4476 conditions per place. [2024-06-21 21:19:19,795 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 659 selfloop transitions, 96 changer transitions 0/760 dead transitions. [2024-06-21 21:19:19,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 760 transitions, 11651 flow [2024-06-21 21:19:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:19:19,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 21:19:19,796 INFO L175 Difference]: Start difference. First operand has 405 places, 731 transitions, 9853 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:19:19,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 760 transitions, 11651 flow [2024-06-21 21:19:22,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 760 transitions, 11442 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:22,833 INFO L231 Difference]: Finished difference. Result has 407 places, 733 transitions, 9961 flow [2024-06-21 21:19:22,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9644, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9961, PETRI_PLACES=407, PETRI_TRANSITIONS=733} [2024-06-21 21:19:22,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 21:19:22,834 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 733 transitions, 9961 flow [2024-06-21 21:19:22,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:22,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:22,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:22,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:19:22,835 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:22,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash 232417672, now seen corresponding path program 3 times [2024-06-21 21:19:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:22,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612136829] [2024-06-21 21:19:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:22,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:23,588 INFO 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 21:19:23,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:23,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612136829] [2024-06-21 21:19:23,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612136829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:23,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135734008] [2024-06-21 21:19:23,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:23,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:23,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:23,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:23,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 733 transitions, 9961 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:23,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:23,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:23,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:25,218 INFO L124 PetriNetUnfolderBase]: 3243/5186 cut-off events. [2024-06-21 21:19:25,219 INFO L125 PetriNetUnfolderBase]: For 793926/793928 co-relation queries the response was YES. [2024-06-21 21:19:25,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52306 conditions, 5186 events. 3243/5186 cut-off events. For 793926/793928 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 31306 event pairs, 455 based on Foata normal form. 14/5199 useless extension candidates. Maximal degree in co-relation 52115. Up to 4416 conditions per place. [2024-06-21 21:19:25,300 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 668 selfloop transitions, 94 changer transitions 0/767 dead transitions. [2024-06-21 21:19:25,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 767 transitions, 11883 flow [2024-06-21 21:19:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:19:25,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-21 21:19:25,301 INFO L175 Difference]: Start difference. First operand has 407 places, 733 transitions, 9961 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:19:25,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 767 transitions, 11883 flow [2024-06-21 21:19:28,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 767 transitions, 11626 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:28,795 INFO L231 Difference]: Finished difference. Result has 409 places, 735 transitions, 10013 flow [2024-06-21 21:19:28,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10013, PETRI_PLACES=409, PETRI_TRANSITIONS=735} [2024-06-21 21:19:28,796 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-21 21:19:28,796 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 735 transitions, 10013 flow [2024-06-21 21:19:28,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:28,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:28,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:28,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:19:28,797 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:28,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:28,797 INFO L85 PathProgramCache]: Analyzing trace with hash 536316740, now seen corresponding path program 4 times [2024-06-21 21:19:28,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:28,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851023716] [2024-06-21 21:19:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:28,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:29,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:29,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851023716] [2024-06-21 21:19:29,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851023716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:29,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:29,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:29,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762460218] [2024-06-21 21:19:29,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:29,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:29,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:29,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:29,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 735 transitions, 10013 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:29,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:29,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:29,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:31,211 INFO L124 PetriNetUnfolderBase]: 3287/5254 cut-off events. [2024-06-21 21:19:31,212 INFO L125 PetriNetUnfolderBase]: For 809145/809147 co-relation queries the response was YES. [2024-06-21 21:19:31,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53143 conditions, 5254 events. 3287/5254 cut-off events. For 809145/809147 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31756 event pairs, 488 based on Foata normal form. 14/5267 useless extension candidates. Maximal degree in co-relation 52951. Up to 4139 conditions per place. [2024-06-21 21:19:31,296 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 514 selfloop transitions, 240 changer transitions 0/759 dead transitions. [2024-06-21 21:19:31,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 759 transitions, 11799 flow [2024-06-21 21:19:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:19:31,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-21 21:19:31,297 INFO L175 Difference]: Start difference. First operand has 409 places, 735 transitions, 10013 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:19:31,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 759 transitions, 11799 flow [2024-06-21 21:19:34,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 759 transitions, 11534 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:34,681 INFO L231 Difference]: Finished difference. Result has 411 places, 737 transitions, 10361 flow [2024-06-21 21:19:34,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9748, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10361, PETRI_PLACES=411, PETRI_TRANSITIONS=737} [2024-06-21 21:19:34,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 21:19:34,682 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 737 transitions, 10361 flow [2024-06-21 21:19:34,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:34,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:34,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:34,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:19:34,683 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:34,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:34,683 INFO L85 PathProgramCache]: Analyzing trace with hash 535990310, now seen corresponding path program 5 times [2024-06-21 21:19:34,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:34,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407393496] [2024-06-21 21:19:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:34,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:35,433 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 21:19:35,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:35,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407393496] [2024-06-21 21:19:35,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407393496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:35,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:35,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717394880] [2024-06-21 21:19:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:35,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:35,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:35,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:35,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 737 transitions, 10361 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:35,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:35,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:35,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:37,149 INFO L124 PetriNetUnfolderBase]: 3403/5426 cut-off events. [2024-06-21 21:19:37,149 INFO L125 PetriNetUnfolderBase]: For 911288/911290 co-relation queries the response was YES. [2024-06-21 21:19:37,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57000 conditions, 5426 events. 3403/5426 cut-off events. For 911288/911290 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32811 event pairs, 498 based on Foata normal form. 14/5439 useless extension candidates. Maximal degree in co-relation 56807. Up to 4097 conditions per place. [2024-06-21 21:19:37,236 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 524 selfloop transitions, 240 changer transitions 0/769 dead transitions. [2024-06-21 21:19:37,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 769 transitions, 12623 flow [2024-06-21 21:19:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:19:37,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 21:19:37,238 INFO L175 Difference]: Start difference. First operand has 411 places, 737 transitions, 10361 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:19:37,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 769 transitions, 12623 flow [2024-06-21 21:19:41,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 769 transitions, 12070 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:41,580 INFO L231 Difference]: Finished difference. Result has 413 places, 741 transitions, 10537 flow [2024-06-21 21:19:41,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9808, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10537, PETRI_PLACES=413, PETRI_TRANSITIONS=741} [2024-06-21 21:19:41,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 21:19:41,581 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 741 transitions, 10537 flow [2024-06-21 21:19:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:41,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:41,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:19:41,582 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:41,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -853942798, now seen corresponding path program 6 times [2024-06-21 21:19:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707418589] [2024-06-21 21:19:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:41,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:42,269 INFO 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 21:19:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:42,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707418589] [2024-06-21 21:19:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707418589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:42,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:42,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719088546] [2024-06-21 21:19:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:42,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:42,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:42,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:42,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 741 transitions, 10537 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:42,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:42,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:42,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:43,881 INFO L124 PetriNetUnfolderBase]: 3375/5394 cut-off events. [2024-06-21 21:19:43,882 INFO L125 PetriNetUnfolderBase]: For 844904/844906 co-relation queries the response was YES. [2024-06-21 21:19:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55139 conditions, 5394 events. 3375/5394 cut-off events. For 844904/844906 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32761 event pairs, 516 based on Foata normal form. 14/5407 useless extension candidates. Maximal degree in co-relation 54945. Up to 4275 conditions per place. [2024-06-21 21:19:43,969 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 508 selfloop transitions, 250 changer transitions 0/763 dead transitions. [2024-06-21 21:19:43,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 763 transitions, 12215 flow [2024-06-21 21:19:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:19:43,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-21 21:19:43,970 INFO L175 Difference]: Start difference. First operand has 413 places, 741 transitions, 10537 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:19:43,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 763 transitions, 12215 flow [2024-06-21 21:19:48,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 763 transitions, 11753 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:48,088 INFO L231 Difference]: Finished difference. Result has 417 places, 741 transitions, 10588 flow [2024-06-21 21:19:48,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10588, PETRI_PLACES=417, PETRI_TRANSITIONS=741} [2024-06-21 21:19:48,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 21:19:48,089 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 741 transitions, 10588 flow [2024-06-21 21:19:48,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:48,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:48,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:19:48,090 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:48,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash 232756006, now seen corresponding path program 1 times [2024-06-21 21:19:48,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:48,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223649165] [2024-06-21 21:19:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:48,880 INFO 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 21:19:48,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:48,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223649165] [2024-06-21 21:19:48,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223649165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:48,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:48,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:19:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809501214] [2024-06-21 21:19:48,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:48,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:19:48,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:19:48,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:19:48,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:48,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 741 transitions, 10588 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:48,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:48,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:48,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:50,562 INFO L124 PetriNetUnfolderBase]: 3431/5484 cut-off events. [2024-06-21 21:19:50,562 INFO L125 PetriNetUnfolderBase]: For 886821/886823 co-relation queries the response was YES. [2024-06-21 21:19:50,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56434 conditions, 5484 events. 3431/5484 cut-off events. For 886821/886823 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33427 event pairs, 523 based on Foata normal form. 18/5501 useless extension candidates. Maximal degree in co-relation 56238. Up to 4846 conditions per place. [2024-06-21 21:19:50,651 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 681 selfloop transitions, 84 changer transitions 0/770 dead transitions. [2024-06-21 21:19:50,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 770 transitions, 12380 flow [2024-06-21 21:19:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:19:50,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-21 21:19:50,652 INFO L175 Difference]: Start difference. First operand has 417 places, 741 transitions, 10588 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:19:50,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 770 transitions, 12380 flow [2024-06-21 21:19:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 770 transitions, 11852 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:19:53,880 INFO L231 Difference]: Finished difference. Result has 419 places, 743 transitions, 10348 flow [2024-06-21 21:19:53,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10060, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10348, PETRI_PLACES=419, PETRI_TRANSITIONS=743} [2024-06-21 21:19:53,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-21 21:19:53,881 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 743 transitions, 10348 flow [2024-06-21 21:19:53,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:53,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:53,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:53,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:19:53,882 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:53,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:53,882 INFO L85 PathProgramCache]: Analyzing trace with hash -908109830, now seen corresponding path program 2 times [2024-06-21 21:19:53,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:53,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217031143] [2024-06-21 21:19:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:53,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:54,798 INFO 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 21:19:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217031143] [2024-06-21 21:19:54,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217031143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:54,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:54,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:19:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886673751] [2024-06-21 21:19:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:54,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:19:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:19:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:19:54,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:19:54,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 743 transitions, 10348 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:54,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:54,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:19:54,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:56,559 INFO L124 PetriNetUnfolderBase]: 3588/5735 cut-off events. [2024-06-21 21:19:56,559 INFO L125 PetriNetUnfolderBase]: For 1096212/1096214 co-relation queries the response was YES. [2024-06-21 21:19:56,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58967 conditions, 5735 events. 3588/5735 cut-off events. For 1096212/1096214 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 35087 event pairs, 582 based on Foata normal form. 45/5777 useless extension candidates. Maximal degree in co-relation 58770. Up to 4379 conditions per place. [2024-06-21 21:19:56,657 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 517 selfloop transitions, 233 changer transitions 18/773 dead transitions. [2024-06-21 21:19:56,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 773 transitions, 12277 flow [2024-06-21 21:19:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:19:56,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-21 21:19:56,658 INFO L175 Difference]: Start difference. First operand has 419 places, 743 transitions, 10348 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:19:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 773 transitions, 12277 flow [2024-06-21 21:20:00,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 773 transitions, 12037 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:00,684 INFO L231 Difference]: Finished difference. Result has 422 places, 732 transitions, 10543 flow [2024-06-21 21:20:00,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10108, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10543, PETRI_PLACES=422, PETRI_TRANSITIONS=732} [2024-06-21 21:20:00,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 21:20:00,685 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 732 transitions, 10543 flow [2024-06-21 21:20:00,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:00,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:00,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:00,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:20:00,686 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:20:00,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 547053404, now seen corresponding path program 3 times [2024-06-21 21:20:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80191012] [2024-06-21 21:20:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:00,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:01,728 INFO 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 21:20:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:01,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80191012] [2024-06-21 21:20:01,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80191012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:01,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:01,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356108196] [2024-06-21 21:20:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:01,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:01,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:01,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:01,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:01,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:20:01,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 732 transitions, 10543 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:01,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:01,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:20:01,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:03,499 INFO L124 PetriNetUnfolderBase]: 3609/5776 cut-off events. [2024-06-21 21:20:03,499 INFO L125 PetriNetUnfolderBase]: For 1137342/1137344 co-relation queries the response was YES. [2024-06-21 21:20:03,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60162 conditions, 5776 events. 3609/5776 cut-off events. For 1137342/1137344 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 35514 event pairs, 592 based on Foata normal form. 45/5818 useless extension candidates. Maximal degree in co-relation 59963. Up to 4437 conditions per place. [2024-06-21 21:20:03,599 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 508 selfloop transitions, 226 changer transitions 23/762 dead transitions. [2024-06-21 21:20:03,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 762 transitions, 12460 flow [2024-06-21 21:20:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:20:03,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:20:03,601 INFO L175 Difference]: Start difference. First operand has 422 places, 732 transitions, 10543 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:20:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 762 transitions, 12460 flow [2024-06-21 21:20:07,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 762 transitions, 11894 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-21 21:20:07,638 INFO L231 Difference]: Finished difference. Result has 423 places, 716 transitions, 10357 flow [2024-06-21 21:20:07,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9977, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10357, PETRI_PLACES=423, PETRI_TRANSITIONS=716} [2024-06-21 21:20:07,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-21 21:20:07,639 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 716 transitions, 10357 flow [2024-06-21 21:20:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:07,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:07,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:07,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:20:07,640 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:20:07,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash -896997260, now seen corresponding path program 4 times [2024-06-21 21:20:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251378371] [2024-06-21 21:20:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:07,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:08,750 INFO 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 21:20:08,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:08,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251378371] [2024-06-21 21:20:08,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251378371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:08,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:08,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:08,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285722245] [2024-06-21 21:20:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:08,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:08,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:20:08,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 716 transitions, 10357 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:08,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:08,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:20:08,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:10,804 INFO L124 PetriNetUnfolderBase]: 4029/6495 cut-off events. [2024-06-21 21:20:10,804 INFO L125 PetriNetUnfolderBase]: For 1656790/1656790 co-relation queries the response was YES. [2024-06-21 21:20:10,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76885 conditions, 6495 events. 4029/6495 cut-off events. For 1656790/1656790 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40836 event pairs, 674 based on Foata normal form. 42/6529 useless extension candidates. Maximal degree in co-relation 76685. Up to 3689 conditions per place. [2024-06-21 21:20:10,930 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 485 selfloop transitions, 281 changer transitions 0/771 dead transitions. [2024-06-21 21:20:10,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 771 transitions, 14027 flow [2024-06-21 21:20:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 21:20:10,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-21 21:20:10,931 INFO L175 Difference]: Start difference. First operand has 423 places, 716 transitions, 10357 flow. Second operand 10 states and 196 transitions. [2024-06-21 21:20:10,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 771 transitions, 14027 flow [2024-06-21 21:20:15,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 771 transitions, 13473 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:15,947 INFO L231 Difference]: Finished difference. Result has 428 places, 729 transitions, 11350 flow [2024-06-21 21:20:15,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9803, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11350, PETRI_PLACES=428, PETRI_TRANSITIONS=729} [2024-06-21 21:20:15,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 21:20:15,948 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 729 transitions, 11350 flow [2024-06-21 21:20:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:15,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:15,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:20:15,963 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:20:15,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash -897010280, now seen corresponding path program 5 times [2024-06-21 21:20:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598116461] [2024-06-21 21:20:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:17,076 INFO 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 21:20:17,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:17,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598116461] [2024-06-21 21:20:17,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598116461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:17,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:17,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863434134] [2024-06-21 21:20:17,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:17,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:17,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:17,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:17,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:20:17,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 729 transitions, 11350 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:17,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:17,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:20:17,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:19,639 INFO L124 PetriNetUnfolderBase]: 4242/6858 cut-off events. [2024-06-21 21:20:19,639 INFO L125 PetriNetUnfolderBase]: For 1829684/1829684 co-relation queries the response was YES. [2024-06-21 21:20:19,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83677 conditions, 6858 events. 4242/6858 cut-off events. For 1829684/1829684 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43808 event pairs, 814 based on Foata normal form. 53/6907 useless extension candidates. Maximal degree in co-relation 83472. Up to 4984 conditions per place. [2024-06-21 21:20:19,754 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 455 selfloop transitions, 310 changer transitions 2/772 dead transitions. [2024-06-21 21:20:19,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 772 transitions, 14470 flow [2024-06-21 21:20:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 21:20:19,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-21 21:20:19,755 INFO L175 Difference]: Start difference. First operand has 428 places, 729 transitions, 11350 flow. Second operand 11 states and 207 transitions. [2024-06-21 21:20:19,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 772 transitions, 14470 flow [2024-06-21 21:20:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 772 transitions, 14161 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-21 21:20:25,013 INFO L231 Difference]: Finished difference. Result has 437 places, 740 transitions, 12341 flow [2024-06-21 21:20:25,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11097, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12341, PETRI_PLACES=437, PETRI_TRANSITIONS=740} [2024-06-21 21:20:25,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-21 21:20:25,013 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 740 transitions, 12341 flow [2024-06-21 21:20:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:25,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:25,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:20:25,014 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:20:25,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1211509054, now seen corresponding path program 2 times [2024-06-21 21:20:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853299610] [2024-06-21 21:20:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:25,872 INFO 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 21:20:25,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:25,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853299610] [2024-06-21 21:20:25,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853299610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:25,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:25,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:25,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635321144] [2024-06-21 21:20:25,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:25,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:25,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:25,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:20:25,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 740 transitions, 12341 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:25,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:25,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:20:25,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:28,448 INFO L124 PetriNetUnfolderBase]: 4243/6861 cut-off events. [2024-06-21 21:20:28,448 INFO L125 PetriNetUnfolderBase]: For 1520424/1520424 co-relation queries the response was YES. [2024-06-21 21:20:28,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84229 conditions, 6861 events. 4243/6861 cut-off events. For 1520424/1520424 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43819 event pairs, 867 based on Foata normal form. 1/6856 useless extension candidates. Maximal degree in co-relation 84021. Up to 6174 conditions per place. [2024-06-21 21:20:28,635 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 683 selfloop transitions, 75 changer transitions 1/764 dead transitions. [2024-06-21 21:20:28,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 764 transitions, 14080 flow [2024-06-21 21:20:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:20:28,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:20:28,636 INFO L175 Difference]: Start difference. First operand has 437 places, 740 transitions, 12341 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:20:28,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 764 transitions, 14080 flow [2024-06-21 21:20:36,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 764 transitions, 13354 flow, removed 158 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:36,583 INFO L231 Difference]: Finished difference. Result has 439 places, 742 transitions, 11870 flow [2024-06-21 21:20:36,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11870, PETRI_PLACES=439, PETRI_TRANSITIONS=742} [2024-06-21 21:20:36,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 21:20:36,583 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 742 transitions, 11870 flow [2024-06-21 21:20:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:36,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:36,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:36,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:20:36,584 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:20:36,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1699589592, now seen corresponding path program 4 times [2024-06-21 21:20:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:36,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626311631] [2024-06-21 21:20:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:36,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:37,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:37,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626311631] [2024-06-21 21:20:37,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626311631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:37,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:37,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:37,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434817401] [2024-06-21 21:20:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:37,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:37,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:20:37,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 742 transitions, 11870 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:37,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:37,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:20:37,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:39,772 INFO L124 PetriNetUnfolderBase]: 4253/6884 cut-off events. [2024-06-21 21:20:39,772 INFO L125 PetriNetUnfolderBase]: For 1500913/1500915 co-relation queries the response was YES. [2024-06-21 21:20:39,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83297 conditions, 6884 events. 4253/6884 cut-off events. For 1500913/1500915 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 44084 event pairs, 870 based on Foata normal form. 3/6886 useless extension candidates. Maximal degree in co-relation 83088. Up to 6190 conditions per place. [2024-06-21 21:20:39,956 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 693 selfloop transitions, 71 changer transitions 0/769 dead transitions. [2024-06-21 21:20:39,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 769 transitions, 13623 flow [2024-06-21 21:20:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:20:39,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 21:20:39,957 INFO L175 Difference]: Start difference. First operand has 439 places, 742 transitions, 11870 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:20:39,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 769 transitions, 13623 flow [2024-06-21 21:20:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 769 transitions, 13404 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:48,813 INFO L231 Difference]: Finished difference. Result has 443 places, 749 transitions, 11973 flow [2024-06-21 21:20:48,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11657, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11973, PETRI_PLACES=443, PETRI_TRANSITIONS=749} [2024-06-21 21:20:48,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 21:20:48,829 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 749 transitions, 11973 flow [2024-06-21 21:20:48,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:48,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:48,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:48,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:20:48,829 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:20:48,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2024836399, now seen corresponding path program 4 times [2024-06-21 21:20:48,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078029338] [2024-06-21 21:20:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:49,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078029338] [2024-06-21 21:20:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078029338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:49,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:49,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:49,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325933491] [2024-06-21 21:20:49,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:49,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:49,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:49,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:20:49,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 749 transitions, 11973 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:49,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:49,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:20:49,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:52,262 INFO L124 PetriNetUnfolderBase]: 4243/6860 cut-off events. [2024-06-21 21:20:52,262 INFO L125 PetriNetUnfolderBase]: For 1521733/1521733 co-relation queries the response was YES. [2024-06-21 21:20:52,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83250 conditions, 6860 events. 4243/6860 cut-off events. For 1521733/1521733 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43799 event pairs, 845 based on Foata normal form. 2/6860 useless extension candidates. Maximal degree in co-relation 83039. Up to 6251 conditions per place. [2024-06-21 21:20:52,383 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 679 selfloop transitions, 83 changer transitions 1/768 dead transitions. [2024-06-21 21:20:52,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 768 transitions, 13680 flow [2024-06-21 21:20:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:20:52,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:20:52,384 INFO L175 Difference]: Start difference. First operand has 443 places, 749 transitions, 11973 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:20:52,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 768 transitions, 13680 flow [2024-06-21 21:21:00,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 768 transitions, 13308 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:00,293 INFO L231 Difference]: Finished difference. Result has 443 places, 751 transitions, 11862 flow [2024-06-21 21:21:00,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11601, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11862, PETRI_PLACES=443, PETRI_TRANSITIONS=751} [2024-06-21 21:21:00,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 21:21:00,293 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 751 transitions, 11862 flow [2024-06-21 21:21:00,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:00,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:00,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:00,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:21:00,294 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:00,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash -924484978, now seen corresponding path program 5 times [2024-06-21 21:21:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:00,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097535164] [2024-06-21 21:21:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:00,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097535164] [2024-06-21 21:21:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097535164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:00,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:00,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:21:00,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390154392] [2024-06-21 21:21:00,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:21:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:21:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:21:00,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:21:00,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 751 transitions, 11862 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:00,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:00,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:21:00,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:03,321 INFO L124 PetriNetUnfolderBase]: 4246/6873 cut-off events. [2024-06-21 21:21:03,322 INFO L125 PetriNetUnfolderBase]: For 1533289/1533289 co-relation queries the response was YES. [2024-06-21 21:21:03,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83278 conditions, 6873 events. 4246/6873 cut-off events. For 1533289/1533289 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43983 event pairs, 850 based on Foata normal form. 1/6872 useless extension candidates. Maximal degree in co-relation 83067. Up to 6141 conditions per place. [2024-06-21 21:21:03,442 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 669 selfloop transitions, 100 changer transitions 0/774 dead transitions. [2024-06-21 21:21:03,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 774 transitions, 13590 flow [2024-06-21 21:21:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:21:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:21:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 21:21:03,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-21 21:21:03,443 INFO L175 Difference]: Start difference. First operand has 443 places, 751 transitions, 11862 flow. Second operand 7 states and 138 transitions. [2024-06-21 21:21:03,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 774 transitions, 13590 flow [2024-06-21 21:21:10,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 774 transitions, 13252 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:10,759 INFO L231 Difference]: Finished difference. Result has 442 places, 754 transitions, 11881 flow [2024-06-21 21:21:10,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11524, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11881, PETRI_PLACES=442, PETRI_TRANSITIONS=754} [2024-06-21 21:21:10,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 401 predicate places. [2024-06-21 21:21:10,760 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 754 transitions, 11881 flow [2024-06-21 21:21:10,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:10,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:10,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:10,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:21:10,761 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:10,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1587922368, now seen corresponding path program 6 times [2024-06-21 21:21:10,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:10,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178984079] [2024-06-21 21:21:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:10,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:11,653 INFO 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 21:21:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178984079] [2024-06-21 21:21:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178984079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:11,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:21:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534720906] [2024-06-21 21:21:11,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:21:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:21:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:21:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:21:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 754 transitions, 11881 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:21:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:14,041 INFO L124 PetriNetUnfolderBase]: 4243/6868 cut-off events. [2024-06-21 21:21:14,041 INFO L125 PetriNetUnfolderBase]: For 1546090/1546092 co-relation queries the response was YES. [2024-06-21 21:21:14,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82915 conditions, 6868 events. 4243/6868 cut-off events. For 1546090/1546092 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43973 event pairs, 868 based on Foata normal form. 3/6870 useless extension candidates. Maximal degree in co-relation 82704. Up to 6164 conditions per place. [2024-06-21 21:21:14,267 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 687 selfloop transitions, 78 changer transitions 0/770 dead transitions. [2024-06-21 21:21:14,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 770 transitions, 13469 flow [2024-06-21 21:21:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:21:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:21:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:21:14,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 21:21:14,268 INFO L175 Difference]: Start difference. First operand has 442 places, 754 transitions, 11881 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:21:14,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 770 transitions, 13469 flow [2024-06-21 21:21:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 770 transitions, 13200 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 21:21:21,773 INFO L231 Difference]: Finished difference. Result has 445 places, 754 transitions, 11774 flow [2024-06-21 21:21:21,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11612, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11774, PETRI_PLACES=445, PETRI_TRANSITIONS=754} [2024-06-21 21:21:21,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-21 21:21:21,774 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 754 transitions, 11774 flow [2024-06-21 21:21:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:21,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:21,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:21,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:21:21,774 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:21,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1558459300, now seen corresponding path program 3 times [2024-06-21 21:21:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:21,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351731416] [2024-06-21 21:21:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:22,567 INFO 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 21:21:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351731416] [2024-06-21 21:21:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351731416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:21:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691498815] [2024-06-21 21:21:22,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:22,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:21:22,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:21:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:21:22,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:21:22,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 754 transitions, 11774 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:22,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:22,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:21:22,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:24,893 INFO L124 PetriNetUnfolderBase]: 4228/6831 cut-off events. [2024-06-21 21:21:24,893 INFO L125 PetriNetUnfolderBase]: For 1513816/1513816 co-relation queries the response was YES. [2024-06-21 21:21:24,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82091 conditions, 6831 events. 4228/6831 cut-off events. For 1513816/1513816 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43568 event pairs, 855 based on Foata normal form. 1/6828 useless extension candidates. Maximal degree in co-relation 81880. Up to 6145 conditions per place. [2024-06-21 21:21:25,024 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 683 selfloop transitions, 83 changer transitions 4/775 dead transitions. [2024-06-21 21:21:25,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 775 transitions, 13463 flow [2024-06-21 21:21:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:21:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:21:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:21:25,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:21:25,025 INFO L175 Difference]: Start difference. First operand has 445 places, 754 transitions, 11774 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:21:25,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 775 transitions, 13463 flow [2024-06-21 21:21:32,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 775 transitions, 13107 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 21:21:32,580 INFO L231 Difference]: Finished difference. Result has 447 places, 752 transitions, 11581 flow [2024-06-21 21:21:32,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11418, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11581, PETRI_PLACES=447, PETRI_TRANSITIONS=752} [2024-06-21 21:21:32,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 21:21:32,581 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 752 transitions, 11581 flow [2024-06-21 21:21:32,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:32,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:32,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:32,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:21:32,582 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:32,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash -569923408, now seen corresponding path program 7 times [2024-06-21 21:21:32,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:32,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050259531] [2024-06-21 21:21:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:32,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:33,332 INFO 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 21:21:33,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050259531] [2024-06-21 21:21:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050259531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:33,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:33,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:21:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612576133] [2024-06-21 21:21:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:21:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:21:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:21:33,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:21:33,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 752 transitions, 11581 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:33,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:33,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:21:33,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:35,609 INFO L124 PetriNetUnfolderBase]: 4190/6771 cut-off events. [2024-06-21 21:21:35,610 INFO L125 PetriNetUnfolderBase]: For 1520645/1520645 co-relation queries the response was YES. [2024-06-21 21:21:35,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81308 conditions, 6771 events. 4190/6771 cut-off events. For 1520645/1520645 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43163 event pairs, 892 based on Foata normal form. 1/6766 useless extension candidates. Maximal degree in co-relation 81096. Up to 5777 conditions per place. [2024-06-21 21:21:35,729 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 567 selfloop transitions, 194 changer transitions 0/766 dead transitions. [2024-06-21 21:21:35,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 766 transitions, 13267 flow [2024-06-21 21:21:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:21:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:21:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:21:35,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:21:35,730 INFO L175 Difference]: Start difference. First operand has 447 places, 752 transitions, 11581 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:21:35,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 766 transitions, 13267 flow [2024-06-21 21:21:43,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 766 transitions, 12846 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:43,853 INFO L231 Difference]: Finished difference. Result has 445 places, 755 transitions, 11693 flow [2024-06-21 21:21:43,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11160, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11693, PETRI_PLACES=445, PETRI_TRANSITIONS=755} [2024-06-21 21:21:43,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-21 21:21:43,855 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 755 transitions, 11693 flow [2024-06-21 21:21:43,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:43,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:43,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:43,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:21:43,857 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:43,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:43,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1577745006, now seen corresponding path program 4 times [2024-06-21 21:21:43,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:43,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014814198] [2024-06-21 21:21:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:43,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:44,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:44,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014814198] [2024-06-21 21:21:44,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014814198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:44,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:44,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:44,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850632961] [2024-06-21 21:21:44,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:44,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:44,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:44,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:21:44,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 755 transitions, 11693 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:44,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:44,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:21:44,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:46,934 INFO L124 PetriNetUnfolderBase]: 4195/6771 cut-off events. [2024-06-21 21:21:46,935 INFO L125 PetriNetUnfolderBase]: For 1547750/1547750 co-relation queries the response was YES. [2024-06-21 21:21:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81844 conditions, 6771 events. 4195/6771 cut-off events. For 1547750/1547750 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 42976 event pairs, 851 based on Foata normal form. 1/6768 useless extension candidates. Maximal degree in co-relation 81632. Up to 6061 conditions per place. [2024-06-21 21:21:47,052 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 665 selfloop transitions, 108 changer transitions 0/778 dead transitions. [2024-06-21 21:21:47,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 778 transitions, 13843 flow [2024-06-21 21:21:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 21:21:47,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2024-06-21 21:21:47,060 INFO L175 Difference]: Start difference. First operand has 445 places, 755 transitions, 11693 flow. Second operand 10 states and 177 transitions. [2024-06-21 21:21:47,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 778 transitions, 13843 flow [2024-06-21 21:21:54,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 778 transitions, 13370 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 21:21:54,574 INFO L231 Difference]: Finished difference. Result has 450 places, 761 transitions, 11744 flow [2024-06-21 21:21:54,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11220, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11744, PETRI_PLACES=450, PETRI_TRANSITIONS=761} [2024-06-21 21:21:54,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-21 21:21:54,575 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 761 transitions, 11744 flow [2024-06-21 21:21:54,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:54,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:54,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:54,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:21:54,576 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:54,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1274566456, now seen corresponding path program 5 times [2024-06-21 21:21:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:54,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325536093] [2024-06-21 21:21:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:54,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:55,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:55,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325536093] [2024-06-21 21:21:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325536093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:55,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:55,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:21:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873801636] [2024-06-21 21:21:55,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:55,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:21:55,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:21:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:21:55,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:21:55,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 761 transitions, 11744 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:55,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:55,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:21:55,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:57,828 INFO L124 PetriNetUnfolderBase]: 4192/6783 cut-off events. [2024-06-21 21:21:57,828 INFO L125 PetriNetUnfolderBase]: For 1567887/1567887 co-relation queries the response was YES. [2024-06-21 21:21:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81956 conditions, 6783 events. 4192/6783 cut-off events. For 1567887/1567887 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43271 event pairs, 925 based on Foata normal form. 1/6783 useless extension candidates. Maximal degree in co-relation 81743. Up to 6363 conditions per place. [2024-06-21 21:21:57,945 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 749 selfloop transitions, 24 changer transitions 0/778 dead transitions. [2024-06-21 21:21:57,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 778 transitions, 13350 flow [2024-06-21 21:21:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:21:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:21:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:21:57,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:21:57,946 INFO L175 Difference]: Start difference. First operand has 450 places, 761 transitions, 11744 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:21:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 778 transitions, 13350 flow [2024-06-21 21:22:04,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 778 transitions, 12935 flow, removed 140 selfloop flow, removed 6 redundant places. [2024-06-21 21:22:04,657 INFO L231 Difference]: Finished difference. Result has 453 places, 761 transitions, 11383 flow [2024-06-21 21:22:04,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11329, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11383, PETRI_PLACES=453, PETRI_TRANSITIONS=761} [2024-06-21 21:22:04,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-21 21:22:04,658 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 761 transitions, 11383 flow [2024-06-21 21:22:04,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:04,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:04,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:04,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:22:04,659 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:04,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1298209915, now seen corresponding path program 5 times [2024-06-21 21:22:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341630233] [2024-06-21 21:22:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:04,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:05,525 INFO 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 21:22:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341630233] [2024-06-21 21:22:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341630233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:05,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:22:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154375176] [2024-06-21 21:22:05,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:05,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:22:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:22:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:22:05,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:22:05,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 761 transitions, 11383 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:05,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:05,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:22:05,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:07,876 INFO L124 PetriNetUnfolderBase]: 4197/6790 cut-off events. [2024-06-21 21:22:07,876 INFO L125 PetriNetUnfolderBase]: For 1584230/1584230 co-relation queries the response was YES. [2024-06-21 21:22:07,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81863 conditions, 6790 events. 4197/6790 cut-off events. For 1584230/1584230 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 43331 event pairs, 839 based on Foata normal form. 1/6789 useless extension candidates. Maximal degree in co-relation 81648. Up to 6139 conditions per place. [2024-06-21 21:22:07,993 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 675 selfloop transitions, 99 changer transitions 0/779 dead transitions. [2024-06-21 21:22:07,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 779 transitions, 13064 flow [2024-06-21 21:22:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:22:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:22:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:22:07,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 21:22:07,995 INFO L175 Difference]: Start difference. First operand has 453 places, 761 transitions, 11383 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:22:07,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 779 transitions, 13064 flow [2024-06-21 21:22:14,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 779 transitions, 13008 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:14,553 INFO L231 Difference]: Finished difference. Result has 456 places, 766 transitions, 11647 flow [2024-06-21 21:22:14,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11327, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11647, PETRI_PLACES=456, PETRI_TRANSITIONS=766} [2024-06-21 21:22:14,554 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 21:22:14,554 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 766 transitions, 11647 flow [2024-06-21 21:22:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:14,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:14,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:14,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:22:14,555 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:14,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1284877435, now seen corresponding path program 6 times [2024-06-21 21:22:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112763817] [2024-06-21 21:22:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:15,591 INFO 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 21:22:15,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112763817] [2024-06-21 21:22:15,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112763817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:15,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:15,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:22:15,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251689376] [2024-06-21 21:22:15,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:22:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:22:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:22:15,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:22:15,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 766 transitions, 11647 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:15,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:15,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:22:15,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:17,970 INFO L124 PetriNetUnfolderBase]: 4212/6815 cut-off events. [2024-06-21 21:22:17,970 INFO L125 PetriNetUnfolderBase]: For 1627569/1627569 co-relation queries the response was YES. [2024-06-21 21:22:18,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82728 conditions, 6815 events. 4212/6815 cut-off events. For 1627569/1627569 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 43601 event pairs, 922 based on Foata normal form. 3/6817 useless extension candidates. Maximal degree in co-relation 82510. Up to 6335 conditions per place. [2024-06-21 21:22:18,097 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 726 selfloop transitions, 59 changer transitions 0/790 dead transitions. [2024-06-21 21:22:18,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 790 transitions, 13525 flow [2024-06-21 21:22:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:22:18,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 21:22:18,098 INFO L175 Difference]: Start difference. First operand has 456 places, 766 transitions, 11647 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:22:18,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 790 transitions, 13525 flow [2024-06-21 21:22:26,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 790 transitions, 13262 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:22:26,402 INFO L231 Difference]: Finished difference. Result has 461 places, 773 transitions, 11774 flow [2024-06-21 21:22:26,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11385, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11774, PETRI_PLACES=461, PETRI_TRANSITIONS=773} [2024-06-21 21:22:26,403 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-21 21:22:26,403 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 773 transitions, 11774 flow [2024-06-21 21:22:26,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:26,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:26,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:22:26,404 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:26,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash 210953093, now seen corresponding path program 7 times [2024-06-21 21:22:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:26,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145577848] [2024-06-21 21:22:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:27,332 INFO 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 21:22:27,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145577848] [2024-06-21 21:22:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145577848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:27,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:22:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702596247] [2024-06-21 21:22:27,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:22:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:22:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:22:27,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:22:27,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 773 transitions, 11774 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:27,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:27,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:22:27,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:29,658 INFO L124 PetriNetUnfolderBase]: 4222/6838 cut-off events. [2024-06-21 21:22:29,658 INFO L125 PetriNetUnfolderBase]: For 1640273/1640275 co-relation queries the response was YES. [2024-06-21 21:22:29,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83107 conditions, 6838 events. 4222/6838 cut-off events. For 1640273/1640275 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 43729 event pairs, 865 based on Foata normal form. 4/6841 useless extension candidates. Maximal degree in co-relation 82889. Up to 5857 conditions per place. [2024-06-21 21:22:29,782 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 616 selfloop transitions, 170 changer transitions 0/791 dead transitions. [2024-06-21 21:22:29,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 791 transitions, 13513 flow [2024-06-21 21:22:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:22:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:22:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:22:29,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:22:29,784 INFO L175 Difference]: Start difference. First operand has 461 places, 773 transitions, 11774 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:22:29,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 791 transitions, 13513 flow [2024-06-21 21:22:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 791 transitions, 13201 flow, removed 104 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:37,669 INFO L231 Difference]: Finished difference. Result has 462 places, 780 transitions, 11952 flow [2024-06-21 21:22:37,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11462, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11952, PETRI_PLACES=462, PETRI_TRANSITIONS=780} [2024-06-21 21:22:37,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-21 21:22:37,684 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 780 transitions, 11952 flow [2024-06-21 21:22:37,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:37,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:37,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:37,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:22:37,685 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash 218304743, now seen corresponding path program 8 times [2024-06-21 21:22:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140401429] [2024-06-21 21:22:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:37,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:38,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140401429] [2024-06-21 21:22:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140401429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:38,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:38,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:22:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017664575] [2024-06-21 21:22:38,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:38,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:22:38,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:22:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:22:38,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:22:38,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 780 transitions, 11952 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:38,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:38,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:22:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:40,894 INFO L124 PetriNetUnfolderBase]: 4232/6848 cut-off events. [2024-06-21 21:22:40,894 INFO L125 PetriNetUnfolderBase]: For 1668376/1668378 co-relation queries the response was YES. [2024-06-21 21:22:40,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83728 conditions, 6848 events. 4232/6848 cut-off events. For 1668376/1668378 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 43844 event pairs, 863 based on Foata normal form. 4/6851 useless extension candidates. Maximal degree in co-relation 83509. Up to 5871 conditions per place. [2024-06-21 21:22:41,021 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 623 selfloop transitions, 167 changer transitions 0/795 dead transitions. [2024-06-21 21:22:41,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 795 transitions, 13679 flow [2024-06-21 21:22:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:22:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:22:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:22:41,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:22:41,022 INFO L175 Difference]: Start difference. First operand has 462 places, 780 transitions, 11952 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:22:41,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 795 transitions, 13679 flow [2024-06-21 21:22:48,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 795 transitions, 13314 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:48,311 INFO L231 Difference]: Finished difference. Result has 467 places, 784 transitions, 12051 flow [2024-06-21 21:22:48,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11587, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12051, PETRI_PLACES=467, PETRI_TRANSITIONS=784} [2024-06-21 21:22:48,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-21 21:22:48,312 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 784 transitions, 12051 flow [2024-06-21 21:22:48,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:48,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:48,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:22:48,313 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:48,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:48,313 INFO L85 PathProgramCache]: Analyzing trace with hash 218571653, now seen corresponding path program 9 times [2024-06-21 21:22:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343859460] [2024-06-21 21:22:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:48,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:49,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:49,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343859460] [2024-06-21 21:22:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343859460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:49,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:49,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:22:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140927362] [2024-06-21 21:22:49,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:49,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:22:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:22:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:22:49,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:22:49,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 784 transitions, 12051 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:49,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:49,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:22:49,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:51,918 INFO L124 PetriNetUnfolderBase]: 4260/6877 cut-off events. [2024-06-21 21:22:51,918 INFO L125 PetriNetUnfolderBase]: For 1723742/1723744 co-relation queries the response was YES. [2024-06-21 21:22:52,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84793 conditions, 6877 events. 4260/6877 cut-off events. For 1723742/1723744 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43789 event pairs, 859 based on Foata normal form. 6/6882 useless extension candidates. Maximal degree in co-relation 84573. Up to 5502 conditions per place. [2024-06-21 21:22:52,091 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 499 selfloop transitions, 304 changer transitions 0/808 dead transitions. [2024-06-21 21:22:52,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 808 transitions, 14457 flow [2024-06-21 21:22:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 21:22:52,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 21:22:52,093 INFO L175 Difference]: Start difference. First operand has 467 places, 784 transitions, 12051 flow. Second operand 10 states and 182 transitions. [2024-06-21 21:22:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 808 transitions, 14457 flow [2024-06-21 21:23:00,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 808 transitions, 14064 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:00,786 INFO L231 Difference]: Finished difference. Result has 472 places, 794 transitions, 12732 flow [2024-06-21 21:23:00,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11658, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12732, PETRI_PLACES=472, PETRI_TRANSITIONS=794} [2024-06-21 21:23:00,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-21 21:23:00,787 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 794 transitions, 12732 flow [2024-06-21 21:23:00,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:00,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:00,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:23:00,787 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:00,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1407062917, now seen corresponding path program 10 times [2024-06-21 21:23:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107381095] [2024-06-21 21:23:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:01,687 INFO 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 21:23:01,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:01,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107381095] [2024-06-21 21:23:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107381095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:01,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:01,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398354207] [2024-06-21 21:23:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:01,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:01,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:01,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:23:01,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 794 transitions, 12732 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:01,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:01,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:23:01,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:03,970 INFO L124 PetriNetUnfolderBase]: 4255/6877 cut-off events. [2024-06-21 21:23:03,970 INFO L125 PetriNetUnfolderBase]: For 1724849/1724851 co-relation queries the response was YES. [2024-06-21 21:23:04,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85721 conditions, 6877 events. 4255/6877 cut-off events. For 1724849/1724851 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43907 event pairs, 859 based on Foata normal form. 3/6879 useless extension candidates. Maximal degree in co-relation 85500. Up to 5906 conditions per place. [2024-06-21 21:23:04,272 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 607 selfloop transitions, 193 changer transitions 0/805 dead transitions. [2024-06-21 21:23:04,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 805 transitions, 14364 flow [2024-06-21 21:23:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:23:04,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:23:04,274 INFO L175 Difference]: Start difference. First operand has 472 places, 794 transitions, 12732 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:23:04,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 805 transitions, 14364 flow [2024-06-21 21:23:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 805 transitions, 13668 flow, removed 191 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:13,372 INFO L231 Difference]: Finished difference. Result has 475 places, 794 transitions, 12428 flow [2024-06-21 21:23:13,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12036, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12428, PETRI_PLACES=475, PETRI_TRANSITIONS=794} [2024-06-21 21:23:13,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 21:23:13,387 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 794 transitions, 12428 flow [2024-06-21 21:23:13,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:13,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:13,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:13,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:23:13,388 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:13,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash -717898035, now seen corresponding path program 11 times [2024-06-21 21:23:13,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:13,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787953140] [2024-06-21 21:23:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:13,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:14,542 INFO 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 21:23:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787953140] [2024-06-21 21:23:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787953140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:14,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:14,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719516961] [2024-06-21 21:23:14,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:14,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:14,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:23:14,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 794 transitions, 12428 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:14,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:14,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:23:14,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:17,009 INFO L124 PetriNetUnfolderBase]: 4265/6884 cut-off events. [2024-06-21 21:23:17,009 INFO L125 PetriNetUnfolderBase]: For 1750173/1750173 co-relation queries the response was YES. [2024-06-21 21:23:17,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86053 conditions, 6884 events. 4265/6884 cut-off events. For 1750173/1750173 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 43890 event pairs, 927 based on Foata normal form. 2/6884 useless extension candidates. Maximal degree in co-relation 85830. Up to 6393 conditions per place. [2024-06-21 21:23:17,133 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 738 selfloop transitions, 69 changer transitions 0/812 dead transitions. [2024-06-21 21:23:17,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 812 transitions, 14196 flow [2024-06-21 21:23:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 21:23:17,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:23:17,135 INFO L175 Difference]: Start difference. First operand has 475 places, 794 transitions, 12428 flow. Second operand 10 states and 170 transitions. [2024-06-21 21:23:17,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 812 transitions, 14196 flow [2024-06-21 21:23:27,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 812 transitions, 13510 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-21 21:23:27,221 INFO L231 Difference]: Finished difference. Result has 473 places, 798 transitions, 12004 flow [2024-06-21 21:23:27,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12004, PETRI_PLACES=473, PETRI_TRANSITIONS=798} [2024-06-21 21:23:27,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-21 21:23:27,222 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 798 transitions, 12004 flow [2024-06-21 21:23:27,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:27,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:27,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:27,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:23:27,223 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:27,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1614334807, now seen corresponding path program 12 times [2024-06-21 21:23:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140972344] [2024-06-21 21:23:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:28,158 INFO 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 21:23:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:28,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140972344] [2024-06-21 21:23:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140972344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:28,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:28,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:28,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112230684] [2024-06-21 21:23:28,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:28,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:28,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:28,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:23:28,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 798 transitions, 12004 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:28,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:28,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:23:28,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:30,734 INFO L124 PetriNetUnfolderBase]: 4286/6925 cut-off events. [2024-06-21 21:23:30,734 INFO L125 PetriNetUnfolderBase]: For 1780639/1780641 co-relation queries the response was YES. [2024-06-21 21:23:30,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85712 conditions, 6925 events. 4286/6925 cut-off events. For 1780639/1780641 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 44373 event pairs, 923 based on Foata normal form. 3/6927 useless extension candidates. Maximal degree in co-relation 85491. Up to 6446 conditions per place. [2024-06-21 21:23:30,851 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 762 selfloop transitions, 58 changer transitions 0/825 dead transitions. [2024-06-21 21:23:30,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 825 transitions, 14174 flow [2024-06-21 21:23:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:23:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:23:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 21:23:30,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-21 21:23:30,852 INFO L175 Difference]: Start difference. First operand has 473 places, 798 transitions, 12004 flow. Second operand 11 states and 182 transitions. [2024-06-21 21:23:30,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 825 transitions, 14174 flow [2024-06-21 21:23:40,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 825 transitions, 13963 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 21:23:40,557 INFO L231 Difference]: Finished difference. Result has 479 places, 810 transitions, 12180 flow [2024-06-21 21:23:40,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11795, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12180, PETRI_PLACES=479, PETRI_TRANSITIONS=810} [2024-06-21 21:23:40,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-21 21:23:40,557 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 810 transitions, 12180 flow [2024-06-21 21:23:40,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:40,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:40,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:40,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:23:40,558 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:40,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1992110387, now seen corresponding path program 13 times [2024-06-21 21:23:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086209182] [2024-06-21 21:23:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:41,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:41,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086209182] [2024-06-21 21:23:41,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086209182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:41,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:41,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448334831] [2024-06-21 21:23:41,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:41,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:41,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:41,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:23:41,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 810 transitions, 12180 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:41,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:41,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:23:41,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:44,034 INFO L124 PetriNetUnfolderBase]: 4326/6974 cut-off events. [2024-06-21 21:23:44,035 INFO L125 PetriNetUnfolderBase]: For 1799435/1799437 co-relation queries the response was YES. [2024-06-21 21:23:44,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86270 conditions, 6974 events. 4326/6974 cut-off events. For 1799435/1799437 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 44503 event pairs, 925 based on Foata normal form. 4/6977 useless extension candidates. Maximal degree in co-relation 86045. Up to 6421 conditions per place. [2024-06-21 21:23:44,158 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 757 selfloop transitions, 89 changer transitions 0/851 dead transitions. [2024-06-21 21:23:44,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 851 transitions, 14848 flow [2024-06-21 21:23:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:23:44,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 21:23:44,160 INFO L175 Difference]: Start difference. First operand has 479 places, 810 transitions, 12180 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:23:44,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 851 transitions, 14848 flow [2024-06-21 21:23:56,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 851 transitions, 14745 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:56,362 INFO L231 Difference]: Finished difference. Result has 485 places, 830 transitions, 12569 flow [2024-06-21 21:23:56,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12077, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12569, PETRI_PLACES=485, PETRI_TRANSITIONS=830} [2024-06-21 21:23:56,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 444 predicate places. [2024-06-21 21:23:56,363 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 830 transitions, 12569 flow [2024-06-21 21:23:56,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:56,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:56,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:56,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:23:56,364 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:56,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1475797423, now seen corresponding path program 14 times [2024-06-21 21:23:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:56,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842951202] [2024-06-21 21:23:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:56,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:57,302 INFO 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 21:23:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:57,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842951202] [2024-06-21 21:23:57,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842951202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:57,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:57,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:57,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609117894] [2024-06-21 21:23:57,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:57,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:57,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:23:57,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 830 transitions, 12569 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:57,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:57,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:23:57,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:59,711 INFO L124 PetriNetUnfolderBase]: 4328/6981 cut-off events. [2024-06-21 21:23:59,712 INFO L125 PetriNetUnfolderBase]: For 1813747/1813749 co-relation queries the response was YES. [2024-06-21 21:23:59,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86608 conditions, 6981 events. 4328/6981 cut-off events. For 1813747/1813749 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44567 event pairs, 925 based on Foata normal form. 4/6984 useless extension candidates. Maximal degree in co-relation 86380. Up to 6515 conditions per place. [2024-06-21 21:23:59,840 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 790 selfloop transitions, 50 changer transitions 0/845 dead transitions. [2024-06-21 21:23:59,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 845 transitions, 14382 flow [2024-06-21 21:23:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:23:59,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 21:23:59,842 INFO L175 Difference]: Start difference. First operand has 485 places, 830 transitions, 12569 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:23:59,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 845 transitions, 14382 flow [2024-06-21 21:24:10,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 845 transitions, 14242 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 21:24:10,907 INFO L231 Difference]: Finished difference. Result has 489 places, 833 transitions, 12635 flow [2024-06-21 21:24:10,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12429, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12635, PETRI_PLACES=489, PETRI_TRANSITIONS=833} [2024-06-21 21:24:10,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-21 21:24:10,908 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 833 transitions, 12635 flow [2024-06-21 21:24:10,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:10,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:10,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:10,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:24:10,909 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:10,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1986396467, now seen corresponding path program 15 times [2024-06-21 21:24:10,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:10,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842664064] [2024-06-21 21:24:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:11,827 INFO 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 21:24:11,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:11,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842664064] [2024-06-21 21:24:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842664064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561799581] [2024-06-21 21:24:11,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:11,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:24:11,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 833 transitions, 12635 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:11,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:24:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:14,373 INFO L124 PetriNetUnfolderBase]: 4323/6973 cut-off events. [2024-06-21 21:24:14,374 INFO L125 PetriNetUnfolderBase]: For 1817402/1817404 co-relation queries the response was YES. [2024-06-21 21:24:14,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86571 conditions, 6973 events. 4323/6973 cut-off events. For 1817402/1817404 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44593 event pairs, 923 based on Foata normal form. 3/6975 useless extension candidates. Maximal degree in co-relation 86341. Up to 6417 conditions per place. [2024-06-21 21:24:14,652 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 755 selfloop transitions, 92 changer transitions 0/852 dead transitions. [2024-06-21 21:24:14,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 852 transitions, 15031 flow [2024-06-21 21:24:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 21:24:14,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-21 21:24:14,654 INFO L175 Difference]: Start difference. First operand has 489 places, 833 transitions, 12635 flow. Second operand 10 states and 171 transitions. [2024-06-21 21:24:14,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 852 transitions, 15031 flow [2024-06-21 21:24:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 852 transitions, 14869 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 21:24:25,013 INFO L231 Difference]: Finished difference. Result has 494 places, 835 transitions, 12753 flow [2024-06-21 21:24:25,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12473, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12753, PETRI_PLACES=494, PETRI_TRANSITIONS=835} [2024-06-21 21:24:25,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 453 predicate places. [2024-06-21 21:24:25,014 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 835 transitions, 12753 flow [2024-06-21 21:24:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:25,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:24:25,015 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:25,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2051624849, now seen corresponding path program 16 times [2024-06-21 21:24:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816935840] [2024-06-21 21:24:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:25,907 INFO 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 21:24:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816935840] [2024-06-21 21:24:25,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816935840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:25,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:25,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:25,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576693378] [2024-06-21 21:24:25,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:25,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:25,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:26,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:24:26,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 835 transitions, 12753 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:26,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:26,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:24:26,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:28,729 INFO L124 PetriNetUnfolderBase]: 4320/6967 cut-off events. [2024-06-21 21:24:28,730 INFO L125 PetriNetUnfolderBase]: For 1830310/1830312 co-relation queries the response was YES. [2024-06-21 21:24:28,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86561 conditions, 6967 events. 4320/6967 cut-off events. For 1830310/1830312 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44517 event pairs, 923 based on Foata normal form. 3/6969 useless extension candidates. Maximal degree in co-relation 86330. Up to 6507 conditions per place. [2024-06-21 21:24:28,857 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 793 selfloop transitions, 51 changer transitions 0/849 dead transitions. [2024-06-21 21:24:28,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 849 transitions, 14485 flow [2024-06-21 21:24:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:24:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:24:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 21:24:28,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-21 21:24:28,858 INFO L175 Difference]: Start difference. First operand has 494 places, 835 transitions, 12753 flow. Second operand 11 states and 179 transitions. [2024-06-21 21:24:28,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 849 transitions, 14485 flow [2024-06-21 21:24:35,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 849 transitions, 14290 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:35,864 INFO L231 Difference]: Finished difference. Result has 499 places, 835 transitions, 12666 flow [2024-06-21 21:24:35,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12558, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12666, PETRI_PLACES=499, PETRI_TRANSITIONS=835} [2024-06-21 21:24:35,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-21 21:24:35,865 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 835 transitions, 12666 flow [2024-06-21 21:24:35,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:35,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:35,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:24:35,865 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:35,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -281913625, now seen corresponding path program 17 times [2024-06-21 21:24:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307787793] [2024-06-21 21:24:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:36,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307787793] [2024-06-21 21:24:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307787793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:36,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:36,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392531167] [2024-06-21 21:24:36,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:36,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:36,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:24:36,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 835 transitions, 12666 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:36,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:36,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:24:36,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:39,468 INFO L124 PetriNetUnfolderBase]: 4312/6957 cut-off events. [2024-06-21 21:24:39,469 INFO L125 PetriNetUnfolderBase]: For 1842300/1842302 co-relation queries the response was YES. [2024-06-21 21:24:39,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86284 conditions, 6957 events. 4312/6957 cut-off events. For 1842300/1842302 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44458 event pairs, 925 based on Foata normal form. 4/6960 useless extension candidates. Maximal degree in co-relation 86052. Up to 6457 conditions per place. [2024-06-21 21:24:39,598 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 782 selfloop transitions, 62 changer transitions 0/849 dead transitions. [2024-06-21 21:24:39,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 849 transitions, 14410 flow [2024-06-21 21:24:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:24:39,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:24:39,599 INFO L175 Difference]: Start difference. First operand has 499 places, 835 transitions, 12666 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:24:39,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 849 transitions, 14410 flow [2024-06-21 21:24:49,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 849 transitions, 14194 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-21 21:24:49,949 INFO L231 Difference]: Finished difference. Result has 497 places, 835 transitions, 12582 flow [2024-06-21 21:24:49,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12450, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12582, PETRI_PLACES=497, PETRI_TRANSITIONS=835} [2024-06-21 21:24:49,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 456 predicate places. [2024-06-21 21:24:49,950 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 835 transitions, 12582 flow [2024-06-21 21:24:49,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:49,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:49,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:49,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:24:49,951 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:49,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash -282303884, now seen corresponding path program 7 times [2024-06-21 21:24:49,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:49,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303421584] [2024-06-21 21:24:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:49,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:50,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:50,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303421584] [2024-06-21 21:24:50,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303421584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:50,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:50,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:50,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748218618] [2024-06-21 21:24:50,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:50,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:50,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:24:50,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 835 transitions, 12582 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:50,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:50,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:24:50,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand