./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.2024-05-21_14-57-05.files/protection/mix052_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/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-76401ed-m [2024-06-20 16:28:43,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:28:43,974 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:28:43,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:28:43,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:28:44,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:28:44,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:28:44,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:28:44,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:28:44,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:28:44,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:28:44,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:28:44,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:28:44,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:28:44,006 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:28:44,007 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:28:44,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:28:44,007 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:28:44,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:28:44,008 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:28:44,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:28:44,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:28:44,009 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:28:44,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:28:44,010 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:28:44,010 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:28:44,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:28:44,010 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:28:44,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:28:44,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:28:44,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:28:44,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:28:44,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:28:44,012 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:28:44,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:28:44,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:28:44,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:28:44,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:28:44,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:28:44,013 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:28:44,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:28:44,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:28:44,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:28:44,019 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:28:44,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:28:44,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:28:44,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:28:44,250 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:28:44,250 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:28:44,251 INFO L431 ainManager$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 [2024-06-20 16:28:45,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:28:45,526 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:28:45,526 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i [2024-06-20 16:28:45,544 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1e02e7e/94e397b354ab48faafb9a0cbc647ad09/FLAG15186ad2e [2024-06-20 16:28:45,556 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1e02e7e/94e397b354ab48faafb9a0cbc647ad09 [2024-06-20 16:28:45,558 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:28:45,559 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:28:45,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix052_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-20 16:28:45,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:28:45,718 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:28:45,719 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:28:45,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:28:45,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:28:45,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:28:45" (1/2) ... [2024-06-20 16:28:45,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33332eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:28:45, skipping insertion in model container [2024-06-20 16:28:45,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:28:45" (1/2) ... [2024-06-20 16:28:45,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7433dd30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:28:45, skipping insertion in model container [2024-06-20 16:28:45,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:45" (2/2) ... [2024-06-20 16:28:45,727 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33332eed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:45, skipping insertion in model container [2024-06-20 16:28:45,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:45" (2/2) ... [2024-06-20 16:28:45,727 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:28:45,843 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:28:45,844 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-20 16:28:45,845 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-20 16:28:45,845 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-20 16:28:45,845 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:28:45,845 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-20 16:28:45,880 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:28:46,154 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:28:46,165 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:28:46,263 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:28:46,294 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:28:46,295 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46 WrapperNode [2024-06-20 16:28:46,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:28:46,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:28:46,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:28:46,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:28:46,304 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 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,316 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 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,344 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-20 16:28:46,345 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:28:46,345 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:28:46,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:28:46,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:28:46,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,356 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,366 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:28:46,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:28:46,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:28:46,401 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:28:46,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:28:46,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (1/1) ... [2024-06-20 16:28:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:28:46,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:28:46,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:28:46,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:28:46,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:28:46,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:28:46,489 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:28:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:28:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:28:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:28:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:28:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:28:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:28:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:28:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:28:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:28:46,495 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:28:46,603 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:28:46,605 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:28:47,022 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:28:47,023 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:28:47,135 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:28:47,135 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:28:47,136 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:28:47 BoogieIcfgContainer [2024-06-20 16:28:47,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:28:47,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:28:47,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:28:47,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:28:47,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:28:45" (1/4) ... [2024-06-20 16:28:47,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6be326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:28:47, skipping insertion in model container [2024-06-20 16:28:47,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:45" (2/4) ... [2024-06-20 16:28:47,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6be326 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:28:47, skipping insertion in model container [2024-06-20 16:28:47,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:46" (3/4) ... [2024-06-20 16:28:47,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6be326 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:28:47, skipping insertion in model container [2024-06-20 16:28:47,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:28:47" (4/4) ... [2024-06-20 16:28:47,143 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_pso.opt_rmo.opt_tso.opt.i [2024-06-20 16:28:47,155 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:28:47,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:28:47,156 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:28:47,191 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:28:47,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:28:47,246 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 16:28:47,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:28:47,249 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. [2024-06-20 16:28:47,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:28:47,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 16:28:47,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:28:47,268 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;@10fa085a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:28:47,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:28:47,292 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:28:47,292 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:28:47,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:28:47,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:47,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:28:47,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:47,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:47,300 INFO L85 PathProgramCache]: Analyzing trace with hash 355559444, now seen corresponding path program 1 times [2024-06-20 16:28:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:47,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191384103] [2024-06-20 16:28:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:48,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:48,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191384103] [2024-06-20 16:28:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191384103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:48,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:48,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:28:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201787631] [2024-06-20 16:28:48,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:48,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:28:48,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:28:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:28:48,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 16:28:48,159 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) [2024-06-20 16:28:48,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:48,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 16:28:48,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:48,424 INFO L124 PetriNetUnfolderBase]: 946/1511 cut-off events. [2024-06-20 16:28:48,424 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 16:28:48,429 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. [2024-06-20 16:28:48,436 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 16:28:48,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 165 flow [2024-06-20 16:28:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:28:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:28:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-20 16:28:48,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 16:28:48,447 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 76 transitions. [2024-06-20 16:28:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 165 flow [2024-06-20 16:28:48,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:48,451 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 16:28:48,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 16:28:48,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 16:28:48,457 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 16:28:48,457 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) [2024-06-20 16:28:48,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:48,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:48,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:28:48,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:48,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1904726733, now seen corresponding path program 1 times [2024-06-20 16:28:48,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:48,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089195831] [2024-06-20 16:28:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:49,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089195831] [2024-06-20 16:28:49,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089195831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:49,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:49,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:28:49,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212047153] [2024-06-20 16:28:49,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:49,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:28:49,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:28:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:28:49,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-20 16:28:49,060 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) [2024-06-20 16:28:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-20 16:28:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:49,275 INFO L124 PetriNetUnfolderBase]: 1110/1712 cut-off events. [2024-06-20 16:28:49,275 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-20 16:28:49,277 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. [2024-06-20 16:28:49,283 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-20 16:28:49,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 234 flow [2024-06-20 16:28:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:28:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:28:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-20 16:28:49,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 16:28:49,285 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 96 transitions. [2024-06-20 16:28:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 234 flow [2024-06-20 16:28:49,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:28:49,286 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-20 16:28:49,287 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} [2024-06-20 16:28:49,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-20 16:28:49,287 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-20 16:28:49,287 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) [2024-06-20 16:28:49,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:49,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:49,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:28:49,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:49,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1083014459, now seen corresponding path program 1 times [2024-06-20 16:28:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:49,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94274208] [2024-06-20 16:28:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:49,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:49,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94274208] [2024-06-20 16:28:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94274208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:49,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:28:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846216701] [2024-06-20 16:28:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:28:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:28:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:28:49,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-20 16:28:49,931 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) [2024-06-20 16:28:49,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:49,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-20 16:28:49,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:50,177 INFO L124 PetriNetUnfolderBase]: 1132/1763 cut-off events. [2024-06-20 16:28:50,177 INFO L125 PetriNetUnfolderBase]: For 989/989 co-relation queries the response was YES. [2024-06-20 16:28:50,179 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. [2024-06-20 16:28:50,185 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-20 16:28:50,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 76 transitions, 400 flow [2024-06-20 16:28:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 16:28:50,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-20 16:28:50,188 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 129 transitions. [2024-06-20 16:28:50,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 76 transitions, 400 flow [2024-06-20 16:28:50,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:28:50,191 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-20 16:28:50,191 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} [2024-06-20 16:28:50,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-20 16:28:50,192 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-20 16:28:50,192 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) [2024-06-20 16:28:50,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:50,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:28:50,192 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)] === [2024-06-20 16:28:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1393059768, now seen corresponding path program 1 times [2024-06-20 16:28:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525245329] [2024-06-20 16:28:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:50,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525245329] [2024-06-20 16:28:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525245329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:50,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:50,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032234482] [2024-06-20 16:28:50,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:50,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:50,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-20 16:28:50,842 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) [2024-06-20 16:28:50,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:50,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-20 16:28:50,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:51,162 INFO L124 PetriNetUnfolderBase]: 1214/1909 cut-off events. [2024-06-20 16:28:51,162 INFO L125 PetriNetUnfolderBase]: For 2570/2570 co-relation queries the response was YES. [2024-06-20 16:28:51,166 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. [2024-06-20 16:28:51,173 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-20 16:28:51,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 86 transitions, 517 flow [2024-06-20 16:28:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 16:28:51,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 16:28:51,175 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 151 transitions. [2024-06-20 16:28:51,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 86 transitions, 517 flow [2024-06-20 16:28:51,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 509 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 16:28:51,179 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 281 flow [2024-06-20 16:28:51,179 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} [2024-06-20 16:28:51,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-20 16:28:51,180 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 281 flow [2024-06-20 16:28:51,180 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) [2024-06-20 16:28:51,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:51,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:28:51,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:51,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 842700762, now seen corresponding path program 1 times [2024-06-20 16:28:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937799618] [2024-06-20 16:28:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:51,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:51,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937799618] [2024-06-20 16:28:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937799618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:51,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:51,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333542303] [2024-06-20 16:28:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:51,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:28:51,679 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) [2024-06-20 16:28:51,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:51,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:28:51,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:51,995 INFO L124 PetriNetUnfolderBase]: 1034/1714 cut-off events. [2024-06-20 16:28:51,995 INFO L125 PetriNetUnfolderBase]: For 3193/3193 co-relation queries the response was YES. [2024-06-20 16:28:51,999 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. [2024-06-20 16:28:52,006 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-20 16:28:52,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 421 flow [2024-06-20 16:28:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-20 16:28:52,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-20 16:28:52,007 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 281 flow. Second operand 5 states and 99 transitions. [2024-06-20 16:28:52,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 421 flow [2024-06-20 16:28:52,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 377 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:52,012 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 261 flow [2024-06-20 16:28:52,012 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} [2024-06-20 16:28:52,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-20 16:28:52,013 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 261 flow [2024-06-20 16:28:52,013 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) [2024-06-20 16:28:52,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:52,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:52,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:28:52,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:52,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1946005207, now seen corresponding path program 1 times [2024-06-20 16:28:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052100277] [2024-06-20 16:28:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:52,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:52,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052100277] [2024-06-20 16:28:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052100277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:52,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:52,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287098933] [2024-06-20 16:28:52,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:52,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:52,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:28:52,634 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) [2024-06-20 16:28:52,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:52,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:28:52,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:53,059 INFO L124 PetriNetUnfolderBase]: 1216/1913 cut-off events. [2024-06-20 16:28:53,060 INFO L125 PetriNetUnfolderBase]: For 4160/4160 co-relation queries the response was YES. [2024-06-20 16:28:53,062 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. [2024-06-20 16:28:53,070 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 51 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-06-20 16:28:53,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 499 flow [2024-06-20 16:28:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-20 16:28:53,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-20 16:28:53,071 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 261 flow. Second operand 6 states and 123 transitions. [2024-06-20 16:28:53,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 499 flow [2024-06-20 16:28:53,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 477 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:53,076 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 311 flow [2024-06-20 16:28:53,076 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} [2024-06-20 16:28:53,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 16:28:53,078 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 311 flow [2024-06-20 16:28:53,078 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) [2024-06-20 16:28:53,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:53,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:53,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:28:53,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1913364039, now seen corresponding path program 2 times [2024-06-20 16:28:53,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:53,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275439960] [2024-06-20 16:28:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:53,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275439960] [2024-06-20 16:28:53,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275439960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:53,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:53,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:53,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110359551] [2024-06-20 16:28:53,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:53,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:53,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:28:53,649 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) [2024-06-20 16:28:53,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:53,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:28:53,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:54,052 INFO L124 PetriNetUnfolderBase]: 1184/1842 cut-off events. [2024-06-20 16:28:54,052 INFO L125 PetriNetUnfolderBase]: For 5084/5088 co-relation queries the response was YES. [2024-06-20 16:28:54,055 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. [2024-06-20 16:28:54,063 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 45 selfloop transitions, 20 changer transitions 0/70 dead transitions. [2024-06-20 16:28:54,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 485 flow [2024-06-20 16:28:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-20 16:28:54,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-20 16:28:54,064 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 311 flow. Second operand 6 states and 119 transitions. [2024-06-20 16:28:54,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 485 flow [2024-06-20 16:28:54,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 456 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:54,070 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 330 flow [2024-06-20 16:28:54,070 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} [2024-06-20 16:28:54,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-20 16:28:54,072 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 330 flow [2024-06-20 16:28:54,072 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) [2024-06-20 16:28:54,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:54,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:28:54,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:54,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 372213887, now seen corresponding path program 1 times [2024-06-20 16:28:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:54,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840165721] [2024-06-20 16:28:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:54,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840165721] [2024-06-20 16:28:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840165721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:54,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:54,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412655324] [2024-06-20 16:28:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:54,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:54,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:28:54,964 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) [2024-06-20 16:28:54,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:54,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:28:54,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:55,351 INFO L124 PetriNetUnfolderBase]: 1006/1650 cut-off events. [2024-06-20 16:28:55,351 INFO L125 PetriNetUnfolderBase]: For 5040/5040 co-relation queries the response was YES. [2024-06-20 16:28:55,355 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. [2024-06-20 16:28:55,369 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-20 16:28:55,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 559 flow [2024-06-20 16:28:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 16:28:55,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-20 16:28:55,372 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 330 flow. Second operand 7 states and 134 transitions. [2024-06-20 16:28:55,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 559 flow [2024-06-20 16:28:55,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 489 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:28:55,380 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 340 flow [2024-06-20 16:28:55,380 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} [2024-06-20 16:28:55,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-20 16:28:55,382 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 340 flow [2024-06-20 16:28:55,382 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) [2024-06-20 16:28:55,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:55,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:55,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:28:55,383 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)] === [2024-06-20 16:28:55,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash -99673232, now seen corresponding path program 1 times [2024-06-20 16:28:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:55,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549441284] [2024-06-20 16:28:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:55,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:55,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549441284] [2024-06-20 16:28:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549441284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:55,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194907704] [2024-06-20 16:28:55,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:55,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:28:55,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:55,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:55,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:28:55,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:56,205 INFO L124 PetriNetUnfolderBase]: 1003/1646 cut-off events. [2024-06-20 16:28:56,205 INFO L125 PetriNetUnfolderBase]: For 5721/5721 co-relation queries the response was YES. [2024-06-20 16:28:56,209 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. [2024-06-20 16:28:56,214 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-20 16:28:56,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 504 flow [2024-06-20 16:28:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-20 16:28:56,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-20 16:28:56,216 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 340 flow. Second operand 5 states and 94 transitions. [2024-06-20 16:28:56,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 504 flow [2024-06-20 16:28:56,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 471 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:56,222 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 355 flow [2024-06-20 16:28:56,222 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} [2024-06-20 16:28:56,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-20 16:28:56,223 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 355 flow [2024-06-20 16:28:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:56,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:56,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:56,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:28:56,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:56,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash -144824154, now seen corresponding path program 1 times [2024-06-20 16:28:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:56,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537958727] [2024-06-20 16:28:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537958727] [2024-06-20 16:28:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537958727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:56,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:56,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289955780] [2024-06-20 16:28:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:56,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:56,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:56,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:56,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:56,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:28:56,979 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) [2024-06-20 16:28:56,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:56,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:28:56,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:57,399 INFO L124 PetriNetUnfolderBase]: 1314/2075 cut-off events. [2024-06-20 16:28:57,399 INFO L125 PetriNetUnfolderBase]: For 10131/10131 co-relation queries the response was YES. [2024-06-20 16:28:57,403 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 10472 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. [2024-06-20 16:28:57,409 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 70 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-20 16:28:57,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 695 flow [2024-06-20 16:28:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 16:28:57,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-20 16:28:57,411 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 355 flow. Second operand 7 states and 145 transitions. [2024-06-20 16:28:57,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 695 flow [2024-06-20 16:28:57,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 669 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:57,418 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 405 flow [2024-06-20 16:28:57,418 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} [2024-06-20 16:28:57,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-20 16:28:57,418 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 405 flow [2024-06-20 16:28:57,419 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) [2024-06-20 16:28:57,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:57,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:57,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:28:57,419 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)] === [2024-06-20 16:28:57,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash -141967194, now seen corresponding path program 2 times [2024-06-20 16:28:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:57,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229825023] [2024-06-20 16:28:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:58,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229825023] [2024-06-20 16:28:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229825023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:58,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:58,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:58,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734784231] [2024-06-20 16:28:58,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:58,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:28:58,179 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) [2024-06-20 16:28:58,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:58,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:28:58,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:58,650 INFO L124 PetriNetUnfolderBase]: 1356/2154 cut-off events. [2024-06-20 16:28:58,650 INFO L125 PetriNetUnfolderBase]: For 12306/12306 co-relation queries the response was YES. [2024-06-20 16:28:58,655 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 11027 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. [2024-06-20 16:28:58,661 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-20 16:28:58,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 681 flow [2024-06-20 16:28:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 16:28:58,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-20 16:28:58,663 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 405 flow. Second operand 7 states and 142 transitions. [2024-06-20 16:28:58,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 681 flow [2024-06-20 16:28:58,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 651 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:58,674 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 453 flow [2024-06-20 16:28:58,675 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} [2024-06-20 16:28:58,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-20 16:28:58,676 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 453 flow [2024-06-20 16:28:58,676 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) [2024-06-20 16:28:58,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:58,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:58,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:28:58,677 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)] === [2024-06-20 16:28:58,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2083842937, now seen corresponding path program 1 times [2024-06-20 16:28:58,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:58,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214528269] [2024-06-20 16:28:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:58,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:59,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214528269] [2024-06-20 16:28:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214528269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:59,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719673411] [2024-06-20 16:28:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:59,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:28:59,339 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) [2024-06-20 16:28:59,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:59,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:28:59,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:59,647 INFO L124 PetriNetUnfolderBase]: 1361/2176 cut-off events. [2024-06-20 16:28:59,648 INFO L125 PetriNetUnfolderBase]: For 12937/12937 co-relation queries the response was YES. [2024-06-20 16:28:59,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 2176 events. 1361/2176 cut-off events. For 12937/12937 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11191 event pairs, 473 based on Foata normal form. 1/2176 useless extension candidates. Maximal degree in co-relation 8793. Up to 2073 conditions per place. [2024-06-20 16:28:59,659 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-20 16:28:59,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 667 flow [2024-06-20 16:28:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:28:59,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:28:59,661 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 453 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:28:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 667 flow [2024-06-20 16:28:59,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 613 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:59,677 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 455 flow [2024-06-20 16:28:59,677 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} [2024-06-20 16:28:59,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 16:28:59,678 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 455 flow [2024-06-20 16:28:59,678 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) [2024-06-20 16:28:59,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:59,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:28:59,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:59,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash 982274746, now seen corresponding path program 1 times [2024-06-20 16:28:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109584759] [2024-06-20 16:28:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109584759] [2024-06-20 16:29:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109584759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:00,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713212920] [2024-06-20 16:29:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:00,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:00,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:00,678 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) [2024-06-20 16:29:00,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:00,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:00,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:01,197 INFO L124 PetriNetUnfolderBase]: 1389/2207 cut-off events. [2024-06-20 16:29:01,197 INFO L125 PetriNetUnfolderBase]: For 14779/14783 co-relation queries the response was YES. [2024-06-20 16:29:01,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9195 conditions, 2207 events. 1389/2207 cut-off events. For 14779/14783 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11274 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. [2024-06-20 16:29:01,208 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 33 changer transitions 0/103 dead transitions. [2024-06-20 16:29:01,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 803 flow [2024-06-20 16:29:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:29:01,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-20 16:29:01,210 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 455 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:29:01,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 803 flow [2024-06-20 16:29:01,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 769 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:01,220 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 599 flow [2024-06-20 16:29:01,220 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} [2024-06-20 16:29:01,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-20 16:29:01,221 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 599 flow [2024-06-20 16:29:01,221 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) [2024-06-20 16:29:01,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:01,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:01,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:29:01,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:01,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1365320416, now seen corresponding path program 2 times [2024-06-20 16:29:01,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:01,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819704028] [2024-06-20 16:29:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819704028] [2024-06-20 16:29:02,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819704028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:02,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:02,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509293983] [2024-06-20 16:29:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:02,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:02,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:02,127 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) [2024-06-20 16:29:02,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:02,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:02,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:02,615 INFO L124 PetriNetUnfolderBase]: 1422/2276 cut-off events. [2024-06-20 16:29:02,615 INFO L125 PetriNetUnfolderBase]: For 17302/17306 co-relation queries the response was YES. [2024-06-20 16:29:02,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9867 conditions, 2276 events. 1422/2276 cut-off events. For 17302/17306 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11829 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. [2024-06-20 16:29:02,627 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 40 changer transitions 0/114 dead transitions. [2024-06-20 16:29:02,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 1011 flow [2024-06-20 16:29:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:29:02,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-20 16:29:02,629 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 599 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:29:02,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 1011 flow [2024-06-20 16:29:02,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 951 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:02,645 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 713 flow [2024-06-20 16:29:02,645 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} [2024-06-20 16:29:02,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-20 16:29:02,646 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 713 flow [2024-06-20 16:29:02,646 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) [2024-06-20 16:29:02,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:02,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:02,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:29:02,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:02,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 978810432, now seen corresponding path program 3 times [2024-06-20 16:29:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:02,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725641610] [2024-06-20 16:29:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:03,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:03,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725641610] [2024-06-20 16:29:03,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725641610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:03,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:03,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:03,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270960510] [2024-06-20 16:29:03,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:03,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:03,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:03,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:03,365 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) [2024-06-20 16:29:03,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:03,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:03,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:03,841 INFO L124 PetriNetUnfolderBase]: 1414/2264 cut-off events. [2024-06-20 16:29:03,841 INFO L125 PetriNetUnfolderBase]: For 19482/19486 co-relation queries the response was YES. [2024-06-20 16:29:03,848 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 11733 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. [2024-06-20 16:29:03,855 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 71 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2024-06-20 16:29:03,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 109 transitions, 994 flow [2024-06-20 16:29:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:29:03,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-20 16:29:03,857 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 713 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:29:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 109 transitions, 994 flow [2024-06-20 16:29:03,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 109 transitions, 894 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:03,883 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 705 flow [2024-06-20 16:29:03,884 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} [2024-06-20 16:29:03,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-20 16:29:03,885 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 705 flow [2024-06-20 16:29:03,885 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) [2024-06-20 16:29:03,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:03,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:29:03,886 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)] === [2024-06-20 16:29:03,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1296657457, now seen corresponding path program 2 times [2024-06-20 16:29:03,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:03,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610416276] [2024-06-20 16:29:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:04,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:04,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610416276] [2024-06-20 16:29:04,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610416276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:04,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:04,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:29:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369761984] [2024-06-20 16:29:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:04,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:29:04,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:29:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:29:04,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:04,573 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) [2024-06-20 16:29:04,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:04,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:04,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:04,827 INFO L124 PetriNetUnfolderBase]: 1411/2279 cut-off events. [2024-06-20 16:29:04,827 INFO L125 PetriNetUnfolderBase]: For 20769/20775 co-relation queries the response was YES. [2024-06-20 16:29:04,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10065 conditions, 2279 events. 1411/2279 cut-off events. For 20769/20775 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11975 event pairs, 442 based on Foata normal form. 7/2285 useless extension candidates. Maximal degree in co-relation 10028. Up to 2153 conditions per place. [2024-06-20 16:29:04,839 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 78 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2024-06-20 16:29:04,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 957 flow [2024-06-20 16:29:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:29:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:29:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:29:04,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:29:04,840 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 705 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:29:04,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 957 flow [2024-06-20 16:29:04,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 99 transitions, 882 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:04,859 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 728 flow [2024-06-20 16:29:04,859 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=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=728, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-06-20 16:29:04,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-20 16:29:04,859 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 728 flow [2024-06-20 16:29:04,860 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) [2024-06-20 16:29:04,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:04,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:04,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:29:04,860 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)] === [2024-06-20 16:29:04,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1525868455, now seen corresponding path program 1 times [2024-06-20 16:29:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071366240] [2024-06-20 16:29:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:05,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:05,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071366240] [2024-06-20 16:29:05,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071366240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:05,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:05,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:29:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511032414] [2024-06-20 16:29:05,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:05,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:29:05,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:29:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:29:05,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:29:05,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 728 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:05,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:05,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:29:05,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:05,889 INFO L124 PetriNetUnfolderBase]: 1338/2212 cut-off events. [2024-06-20 16:29:05,889 INFO L125 PetriNetUnfolderBase]: For 24021/24021 co-relation queries the response was YES. [2024-06-20 16:29:05,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10039 conditions, 2212 events. 1338/2212 cut-off events. For 24021/24021 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11869 event pairs, 406 based on Foata normal form. 3/2212 useless extension candidates. Maximal degree in co-relation 10000. Up to 2018 conditions per place. [2024-06-20 16:29:05,899 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 86 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-06-20 16:29:05,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 106 transitions, 974 flow [2024-06-20 16:29:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:29:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:29:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:29:05,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-20 16:29:05,902 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 728 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:29:05,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 106 transitions, 974 flow [2024-06-20 16:29:05,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 942 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 16:29:05,923 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 748 flow [2024-06-20 16:29:05,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-06-20 16:29:05,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-20 16:29:05,924 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 748 flow [2024-06-20 16:29:05,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:05,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:05,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:05,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:29:05,925 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)] === [2024-06-20 16:29:05,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1296651505, now seen corresponding path program 2 times [2024-06-20 16:29:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:05,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930951149] [2024-06-20 16:29:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:06,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930951149] [2024-06-20 16:29:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930951149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:06,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:29:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52571502] [2024-06-20 16:29:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:29:06,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:29:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:29:06,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:29:06,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 748 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:06,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:06,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:29:06,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:06,977 INFO L124 PetriNetUnfolderBase]: 1337/2214 cut-off events. [2024-06-20 16:29:06,978 INFO L125 PetriNetUnfolderBase]: For 26093/26095 co-relation queries the response was YES. [2024-06-20 16:29:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10406 conditions, 2214 events. 1337/2214 cut-off events. For 26093/26095 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11914 event pairs, 409 based on Foata normal form. 5/2216 useless extension candidates. Maximal degree in co-relation 10365. Up to 2007 conditions per place. [2024-06-20 16:29:06,992 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 80 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-20 16:29:06,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 107 transitions, 998 flow [2024-06-20 16:29:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:29:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:29:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:29:06,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-20 16:29:06,994 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 748 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:29:06,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 107 transitions, 998 flow [2024-06-20 16:29:07,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 968 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:07,013 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 791 flow [2024-06-20 16:29:07,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=791, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2024-06-20 16:29:07,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 16:29:07,014 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 791 flow [2024-06-20 16:29:07,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:07,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:07,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:29:07,014 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)] === [2024-06-20 16:29:07,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1296643569, now seen corresponding path program 1 times [2024-06-20 16:29:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:07,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887187184] [2024-06-20 16:29:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:07,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:07,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887187184] [2024-06-20 16:29:07,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887187184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:07,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926534317] [2024-06-20 16:29:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:07,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:07,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 791 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) [2024-06-20 16:29:07,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:07,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:08,141 INFO L124 PetriNetUnfolderBase]: 1432/2311 cut-off events. [2024-06-20 16:29:08,141 INFO L125 PetriNetUnfolderBase]: For 27862/27862 co-relation queries the response was YES. [2024-06-20 16:29:08,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 2311 events. 1432/2311 cut-off events. For 27862/27862 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12156 event pairs, 436 based on Foata normal form. 1/2311 useless extension candidates. Maximal degree in co-relation 11117. Up to 2198 conditions per place. [2024-06-20 16:29:08,156 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2024-06-20 16:29:08,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 1055 flow [2024-06-20 16:29:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:29:08,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 16:29:08,157 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 791 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:29:08,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 1055 flow [2024-06-20 16:29:08,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 1006 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:08,181 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 814 flow [2024-06-20 16:29:08,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-06-20 16:29:08,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 16:29:08,181 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 814 flow [2024-06-20 16:29:08,182 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) [2024-06-20 16:29:08,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:08,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:08,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:29:08,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:08,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1553648935, now seen corresponding path program 1 times [2024-06-20 16:29:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:08,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357927178] [2024-06-20 16:29:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:08,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:08,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:08,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357927178] [2024-06-20 16:29:08,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357927178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:08,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:08,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:08,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222906770] [2024-06-20 16:29:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:08,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:08,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 814 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) [2024-06-20 16:29:08,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:08,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:08,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:09,262 INFO L124 PetriNetUnfolderBase]: 1447/2339 cut-off events. [2024-06-20 16:29:09,263 INFO L125 PetriNetUnfolderBase]: For 30531/30533 co-relation queries the response was YES. [2024-06-20 16:29:09,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11500 conditions, 2339 events. 1447/2339 cut-off events. For 30531/30533 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12380 event pairs, 432 based on Foata normal form. 5/2343 useless extension candidates. Maximal degree in co-relation 11457. Up to 2139 conditions per place. [2024-06-20 16:29:09,275 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 100 selfloop transitions, 24 changer transitions 0/129 dead transitions. [2024-06-20 16:29:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 129 transitions, 1178 flow [2024-06-20 16:29:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:29:09,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-20 16:29:09,277 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 814 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:29:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 129 transitions, 1178 flow [2024-06-20 16:29:09,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 129 transitions, 1108 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:09,298 INFO L231 Difference]: Finished difference. Result has 100 places, 106 transitions, 876 flow [2024-06-20 16:29:09,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2024-06-20 16:29:09,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-20 16:29:09,298 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 876 flow [2024-06-20 16:29:09,299 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) [2024-06-20 16:29:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:09,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:09,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:29:09,299 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:09,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:09,299 INFO L85 PathProgramCache]: Analyzing trace with hash -821230338, now seen corresponding path program 1 times [2024-06-20 16:29:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:09,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792807140] [2024-06-20 16:29:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:10,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792807140] [2024-06-20 16:29:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792807140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:10,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:10,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31767014] [2024-06-20 16:29:10,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:10,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:10,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 876 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) [2024-06-20 16:29:10,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:10,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:10,661 INFO L124 PetriNetUnfolderBase]: 1557/2536 cut-off events. [2024-06-20 16:29:10,661 INFO L125 PetriNetUnfolderBase]: For 35628/35628 co-relation queries the response was YES. [2024-06-20 16:29:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12913 conditions, 2536 events. 1557/2536 cut-off events. For 35628/35628 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13819 event pairs, 444 based on Foata normal form. 12/2546 useless extension candidates. Maximal degree in co-relation 12869. Up to 1961 conditions per place. [2024-06-20 16:29:10,673 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 102 selfloop transitions, 37 changer transitions 0/144 dead transitions. [2024-06-20 16:29:10,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 144 transitions, 1307 flow [2024-06-20 16:29:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:29:10,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-20 16:29:10,674 INFO L175 Difference]: Start difference. First operand has 100 places, 106 transitions, 876 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:29:10,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 144 transitions, 1307 flow [2024-06-20 16:29:10,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 144 transitions, 1247 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:10,703 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 968 flow [2024-06-20 16:29:10,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=968, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-20 16:29:10,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 16:29:10,703 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 968 flow [2024-06-20 16:29:10,704 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) [2024-06-20 16:29:10,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:10,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:10,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:29:10,704 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:10,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -174620359, now seen corresponding path program 2 times [2024-06-20 16:29:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:10,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449931713] [2024-06-20 16:29:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:11,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:11,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449931713] [2024-06-20 16:29:11,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449931713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:11,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:11,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:11,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090417347] [2024-06-20 16:29:11,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:11,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:11,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:11,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:11,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:11,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:11,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 968 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) [2024-06-20 16:29:11,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:11,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:11,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:11,834 INFO L124 PetriNetUnfolderBase]: 1608/2622 cut-off events. [2024-06-20 16:29:11,835 INFO L125 PetriNetUnfolderBase]: For 39008/39010 co-relation queries the response was YES. [2024-06-20 16:29:11,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13678 conditions, 2622 events. 1608/2622 cut-off events. For 39008/39010 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14513 event pairs, 460 based on Foata normal form. 5/2626 useless extension candidates. Maximal degree in co-relation 13633. Up to 2352 conditions per place. [2024-06-20 16:29:11,849 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 104 selfloop transitions, 29 changer transitions 0/138 dead transitions. [2024-06-20 16:29:11,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 1412 flow [2024-06-20 16:29:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:29:11,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:29:11,850 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 968 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:29:11,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 1412 flow [2024-06-20 16:29:11,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 138 transitions, 1361 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:11,884 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 1089 flow [2024-06-20 16:29:11,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1089, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-06-20 16:29:11,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-20 16:29:11,885 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 1089 flow [2024-06-20 16:29:11,885 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) [2024-06-20 16:29:11,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:11,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:29:11,886 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:11,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -174619987, now seen corresponding path program 1 times [2024-06-20 16:29:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206620554] [2024-06-20 16:29:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:12,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206620554] [2024-06-20 16:29:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206620554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:12,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:12,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:12,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745530234] [2024-06-20 16:29:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:12,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:12,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 1089 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) [2024-06-20 16:29:12,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:12,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:12,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:12,989 INFO L124 PetriNetUnfolderBase]: 1613/2628 cut-off events. [2024-06-20 16:29:12,989 INFO L125 PetriNetUnfolderBase]: For 42333/42333 co-relation queries the response was YES. [2024-06-20 16:29:12,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14344 conditions, 2628 events. 1613/2628 cut-off events. For 42333/42333 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14412 event pairs, 460 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 14297. Up to 2470 conditions per place. [2024-06-20 16:29:13,005 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 119 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2024-06-20 16:29:13,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 138 transitions, 1441 flow [2024-06-20 16:29:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:29:13,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:29:13,006 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 1089 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:29:13,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 138 transitions, 1441 flow [2024-06-20 16:29:13,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 138 transitions, 1380 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:13,052 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 1114 flow [2024-06-20 16:29:13,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1114, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2024-06-20 16:29:13,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-20 16:29:13,052 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 1114 flow [2024-06-20 16:29:13,052 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) [2024-06-20 16:29:13,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:13,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:13,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:29:13,053 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)] === [2024-06-20 16:29:13,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:13,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1246645854, now seen corresponding path program 2 times [2024-06-20 16:29:13,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:13,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93929240] [2024-06-20 16:29:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:13,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:13,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93929240] [2024-06-20 16:29:13,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93929240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:13,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:13,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:13,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516102724] [2024-06-20 16:29:13,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:13,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:13,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:13,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 1114 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) [2024-06-20 16:29:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:13,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:14,422 INFO L124 PetriNetUnfolderBase]: 1593/2600 cut-off events. [2024-06-20 16:29:14,422 INFO L125 PetriNetUnfolderBase]: For 45172/45172 co-relation queries the response was YES. [2024-06-20 16:29:14,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14278 conditions, 2600 events. 1593/2600 cut-off events. For 45172/45172 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14282 event pairs, 281 based on Foata normal form. 12/2610 useless extension candidates. Maximal degree in co-relation 14229. Up to 1591 conditions per place. [2024-06-20 16:29:14,440 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 107 selfloop transitions, 40 changer transitions 0/152 dead transitions. [2024-06-20 16:29:14,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1506 flow [2024-06-20 16:29:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 16:29:14,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-20 16:29:14,442 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 1114 flow. Second operand 7 states and 142 transitions. [2024-06-20 16:29:14,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1506 flow [2024-06-20 16:29:14,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 152 transitions, 1436 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:14,514 INFO L231 Difference]: Finished difference. Result has 116 places, 122 transitions, 1133 flow [2024-06-20 16:29:14,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=116, PETRI_TRANSITIONS=122} [2024-06-20 16:29:14,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-20 16:29:14,515 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 122 transitions, 1133 flow [2024-06-20 16:29:14,515 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) [2024-06-20 16:29:14,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:14,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:29:14,515 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)] === [2024-06-20 16:29:14,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1950610494, now seen corresponding path program 3 times [2024-06-20 16:29:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:14,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83725173] [2024-06-20 16:29:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83725173] [2024-06-20 16:29:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83725173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:15,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537768688] [2024-06-20 16:29:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:15,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:15,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 122 transitions, 1133 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) [2024-06-20 16:29:15,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:15,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:15,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:15,730 INFO L124 PetriNetUnfolderBase]: 1573/2569 cut-off events. [2024-06-20 16:29:15,731 INFO L125 PetriNetUnfolderBase]: For 46893/46897 co-relation queries the response was YES. [2024-06-20 16:29:15,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14241 conditions, 2569 events. 1573/2569 cut-off events. For 46893/46897 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14098 event pairs, 264 based on Foata normal form. 13/2579 useless extension candidates. Maximal degree in co-relation 14191. Up to 1449 conditions per place. [2024-06-20 16:29:15,746 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 102 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2024-06-20 16:29:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 146 transitions, 1467 flow [2024-06-20 16:29:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 16:29:15,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-20 16:29:15,748 INFO L175 Difference]: Start difference. First operand has 116 places, 122 transitions, 1133 flow. Second operand 7 states and 134 transitions. [2024-06-20 16:29:15,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 146 transitions, 1467 flow [2024-06-20 16:29:15,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 1363 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:15,791 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 1079 flow [2024-06-20 16:29:15,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-20 16:29:15,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-20 16:29:15,791 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 1079 flow [2024-06-20 16:29:15,792 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) [2024-06-20 16:29:15,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:15,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:29:15,792 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:15,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1541674255, now seen corresponding path program 3 times [2024-06-20 16:29:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119643341] [2024-06-20 16:29:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:16,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119643341] [2024-06-20 16:29:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119643341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:16,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:16,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091826530] [2024-06-20 16:29:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:16,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:16,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 1079 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) [2024-06-20 16:29:16,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:16,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:16,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:16,843 INFO L124 PetriNetUnfolderBase]: 1600/2614 cut-off events. [2024-06-20 16:29:16,843 INFO L125 PetriNetUnfolderBase]: For 44977/44983 co-relation queries the response was YES. [2024-06-20 16:29:16,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14404 conditions, 2614 events. 1600/2614 cut-off events. For 44977/44983 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14414 event pairs, 460 based on Foata normal form. 6/2618 useless extension candidates. Maximal degree in co-relation 14353. Up to 2275 conditions per place. [2024-06-20 16:29:16,862 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 103 selfloop transitions, 41 changer transitions 0/149 dead transitions. [2024-06-20 16:29:16,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 149 transitions, 1637 flow [2024-06-20 16:29:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:29:16,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-20 16:29:16,864 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 1079 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:29:16,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 149 transitions, 1637 flow [2024-06-20 16:29:16,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 149 transitions, 1526 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:16,907 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1237 flow [2024-06-20 16:29:16,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1237, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-20 16:29:16,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-20 16:29:16,921 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1237 flow [2024-06-20 16:29:16,921 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) [2024-06-20 16:29:16,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:16,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:16,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:29:16,923 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 179643053, now seen corresponding path program 2 times [2024-06-20 16:29:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:16,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096936356] [2024-06-20 16:29:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:17,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096936356] [2024-06-20 16:29:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096936356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:17,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224480521] [2024-06-20 16:29:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:17,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:17,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:17,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1237 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) [2024-06-20 16:29:17,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:17,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:18,039 INFO L124 PetriNetUnfolderBase]: 1605/2617 cut-off events. [2024-06-20 16:29:18,040 INFO L125 PetriNetUnfolderBase]: For 49030/49038 co-relation queries the response was YES. [2024-06-20 16:29:18,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14894 conditions, 2617 events. 1605/2617 cut-off events. For 49030/49038 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14348 event pairs, 445 based on Foata normal form. 9/2625 useless extension candidates. Maximal degree in co-relation 14841. Up to 2435 conditions per place. [2024-06-20 16:29:18,057 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 120 selfloop transitions, 26 changer transitions 0/151 dead transitions. [2024-06-20 16:29:18,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 151 transitions, 1717 flow [2024-06-20 16:29:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:29:18,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 16:29:18,059 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1237 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:29:18,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 151 transitions, 1717 flow [2024-06-20 16:29:18,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 151 transitions, 1634 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 16:29:18,108 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1330 flow [2024-06-20 16:29:18,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1330, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-20 16:29:18,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-20 16:29:18,108 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1330 flow [2024-06-20 16:29:18,109 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) [2024-06-20 16:29:18,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:18,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:18,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:29:18,109 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:18,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1541258173, now seen corresponding path program 3 times [2024-06-20 16:29:18,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:18,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928291416] [2024-06-20 16:29:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928291416] [2024-06-20 16:29:18,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928291416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:18,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:18,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:18,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19682323] [2024-06-20 16:29:18,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:18,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:18,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:18,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:18,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1330 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) [2024-06-20 16:29:18,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:18,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:18,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:19,240 INFO L124 PetriNetUnfolderBase]: 1602/2611 cut-off events. [2024-06-20 16:29:19,240 INFO L125 PetriNetUnfolderBase]: For 50826/50826 co-relation queries the response was YES. [2024-06-20 16:29:19,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14705 conditions, 2611 events. 1602/2611 cut-off events. For 50826/50826 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14321 event pairs, 438 based on Foata normal form. 1/2611 useless extension candidates. Maximal degree in co-relation 14650. Up to 2459 conditions per place. [2024-06-20 16:29:19,257 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2024-06-20 16:29:19,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 150 transitions, 1644 flow [2024-06-20 16:29:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:29:19,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-20 16:29:19,259 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1330 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:29:19,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 150 transitions, 1644 flow [2024-06-20 16:29:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1530 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:19,306 INFO L231 Difference]: Finished difference. Result has 128 places, 140 transitions, 1250 flow [2024-06-20 16:29:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1250, PETRI_PLACES=128, PETRI_TRANSITIONS=140} [2024-06-20 16:29:19,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-20 16:29:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 140 transitions, 1250 flow [2024-06-20 16:29:19,307 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) [2024-06-20 16:29:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:19,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:29:19,308 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2575889, now seen corresponding path program 1 times [2024-06-20 16:29:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400344898] [2024-06-20 16:29:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:20,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400344898] [2024-06-20 16:29:20,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400344898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:20,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:20,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411963147] [2024-06-20 16:29:20,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:20,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:20,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:20,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:20,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:29:20,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 140 transitions, 1250 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) [2024-06-20 16:29:20,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:20,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:29:20,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:20,617 INFO L124 PetriNetUnfolderBase]: 1535/2538 cut-off events. [2024-06-20 16:29:20,618 INFO L125 PetriNetUnfolderBase]: For 54830/54838 co-relation queries the response was YES. [2024-06-20 16:29:20,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14417 conditions, 2538 events. 1535/2538 cut-off events. For 54830/54838 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14172 event pairs, 408 based on Foata normal form. 2/2521 useless extension candidates. Maximal degree in co-relation 14360. Up to 2270 conditions per place. [2024-06-20 16:29:20,636 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2024-06-20 16:29:20,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 159 transitions, 1618 flow [2024-06-20 16:29:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:29:20,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-20 16:29:20,638 INFO L175 Difference]: Start difference. First operand has 128 places, 140 transitions, 1250 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:29:20,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 159 transitions, 1618 flow [2024-06-20 16:29:20,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 159 transitions, 1580 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:20,688 INFO L231 Difference]: Finished difference. Result has 129 places, 143 transitions, 1292 flow [2024-06-20 16:29:20,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=129, PETRI_TRANSITIONS=143} [2024-06-20 16:29:20,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-20 16:29:20,689 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 143 transitions, 1292 flow [2024-06-20 16:29:20,689 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) [2024-06-20 16:29:20,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:20,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:20,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:29:20,690 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:20,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 180073643, now seen corresponding path program 1 times [2024-06-20 16:29:20,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:20,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549585596] [2024-06-20 16:29:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:20,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:21,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:21,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549585596] [2024-06-20 16:29:21,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549585596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:21,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:21,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280010365] [2024-06-20 16:29:21,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:21,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:21,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:21,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:21,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:21,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 143 transitions, 1292 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) [2024-06-20 16:29:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:21,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:22,010 INFO L124 PetriNetUnfolderBase]: 1591/2596 cut-off events. [2024-06-20 16:29:22,010 INFO L125 PetriNetUnfolderBase]: For 56997/56997 co-relation queries the response was YES. [2024-06-20 16:29:22,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2596 events. 1591/2596 cut-off events. For 56997/56997 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14170 event pairs, 435 based on Foata normal form. 2/2597 useless extension candidates. Maximal degree in co-relation 14875. Up to 2438 conditions per place. [2024-06-20 16:29:22,028 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2024-06-20 16:29:22,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 157 transitions, 1670 flow [2024-06-20 16:29:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:29:22,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-20 16:29:22,030 INFO L175 Difference]: Start difference. First operand has 129 places, 143 transitions, 1292 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:29:22,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 157 transitions, 1670 flow [2024-06-20 16:29:22,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 157 transitions, 1616 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:22,080 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1325 flow [2024-06-20 16:29:22,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1325, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-20 16:29:22,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-20 16:29:22,081 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1325 flow [2024-06-20 16:29:22,081 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) [2024-06-20 16:29:22,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:22,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:29:22,081 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:22,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1127516643, now seen corresponding path program 1 times [2024-06-20 16:29:22,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:22,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356889711] [2024-06-20 16:29:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:22,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:22,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:22,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356889711] [2024-06-20 16:29:22,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356889711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:22,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:22,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875228556] [2024-06-20 16:29:22,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:22,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:22,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:22,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1325 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) [2024-06-20 16:29:22,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:22,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:22,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:23,200 INFO L124 PetriNetUnfolderBase]: 1606/2620 cut-off events. [2024-06-20 16:29:23,201 INFO L125 PetriNetUnfolderBase]: For 60904/60906 co-relation queries the response was YES. [2024-06-20 16:29:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15247 conditions, 2620 events. 1606/2620 cut-off events. For 60904/60906 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14330 event pairs, 436 based on Foata normal form. 5/2624 useless extension candidates. Maximal degree in co-relation 15188. Up to 2374 conditions per place. [2024-06-20 16:29:23,220 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 141 selfloop transitions, 28 changer transitions 0/174 dead transitions. [2024-06-20 16:29:23,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 174 transitions, 1799 flow [2024-06-20 16:29:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:29:23,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:29:23,223 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1325 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:29:23,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 174 transitions, 1799 flow [2024-06-20 16:29:23,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 174 transitions, 1728 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:23,281 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1391 flow [2024-06-20 16:29:23,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-20 16:29:23,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-20 16:29:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1391 flow [2024-06-20 16:29:23,281 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) [2024-06-20 16:29:23,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:23,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:23,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:29:23,282 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:23,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1123972506, now seen corresponding path program 1 times [2024-06-20 16:29:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:23,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790228805] [2024-06-20 16:29:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:23,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:23,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790228805] [2024-06-20 16:29:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790228805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:23,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:23,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:23,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579233231] [2024-06-20 16:29:23,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:23,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:23,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:23,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:23,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1391 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) [2024-06-20 16:29:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:24,591 INFO L124 PetriNetUnfolderBase]: 1626/2652 cut-off events. [2024-06-20 16:29:24,592 INFO L125 PetriNetUnfolderBase]: For 65843/65845 co-relation queries the response was YES. [2024-06-20 16:29:24,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15949 conditions, 2652 events. 1626/2652 cut-off events. For 65843/65845 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14596 event pairs, 434 based on Foata normal form. 6/2657 useless extension candidates. Maximal degree in co-relation 15889. Up to 2410 conditions per place. [2024-06-20 16:29:24,629 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-06-20 16:29:24,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 173 transitions, 1835 flow [2024-06-20 16:29:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:29:24,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-20 16:29:24,632 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1391 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:29:24,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 173 transitions, 1835 flow [2024-06-20 16:29:24,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 173 transitions, 1726 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:24,711 INFO L231 Difference]: Finished difference. Result has 135 places, 153 transitions, 1397 flow [2024-06-20 16:29:24,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1397, PETRI_PLACES=135, PETRI_TRANSITIONS=153} [2024-06-20 16:29:24,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-20 16:29:24,712 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 153 transitions, 1397 flow [2024-06-20 16:29:24,712 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) [2024-06-20 16:29:24,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:24,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:24,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:29:24,712 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:24,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1118258586, now seen corresponding path program 2 times [2024-06-20 16:29:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771644597] [2024-06-20 16:29:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:25,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771644597] [2024-06-20 16:29:25,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771644597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:25,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:25,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:25,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496667483] [2024-06-20 16:29:25,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:25,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:25,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:25,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:25,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:25,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:25,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 153 transitions, 1397 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) [2024-06-20 16:29:25,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:25,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:25,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:25,894 INFO L124 PetriNetUnfolderBase]: 1630/2662 cut-off events. [2024-06-20 16:29:25,894 INFO L125 PetriNetUnfolderBase]: For 68700/68702 co-relation queries the response was YES. [2024-06-20 16:29:25,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16011 conditions, 2662 events. 1630/2662 cut-off events. For 68700/68702 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14658 event pairs, 433 based on Foata normal form. 6/2667 useless extension candidates. Maximal degree in co-relation 15950. Up to 2359 conditions per place. [2024-06-20 16:29:25,911 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 135 selfloop transitions, 35 changer transitions 0/175 dead transitions. [2024-06-20 16:29:25,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 175 transitions, 1903 flow [2024-06-20 16:29:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:29:25,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-20 16:29:25,914 INFO L175 Difference]: Start difference. First operand has 135 places, 153 transitions, 1397 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:29:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 175 transitions, 1903 flow [2024-06-20 16:29:25,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 175 transitions, 1845 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:25,981 INFO L231 Difference]: Finished difference. Result has 138 places, 156 transitions, 1470 flow [2024-06-20 16:29:25,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1470, PETRI_PLACES=138, PETRI_TRANSITIONS=156} [2024-06-20 16:29:25,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 16:29:25,982 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 156 transitions, 1470 flow [2024-06-20 16:29:25,982 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) [2024-06-20 16:29:25,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:25,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:25,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:29:25,982 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:25,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1118262213, now seen corresponding path program 2 times [2024-06-20 16:29:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395495136] [2024-06-20 16:29:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:25,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:26,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:26,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395495136] [2024-06-20 16:29:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395495136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:26,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:26,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617142248] [2024-06-20 16:29:26,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:26,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:26,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:26,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 156 transitions, 1470 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) [2024-06-20 16:29:26,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:26,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:26,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:27,207 INFO L124 PetriNetUnfolderBase]: 1705/2778 cut-off events. [2024-06-20 16:29:27,208 INFO L125 PetriNetUnfolderBase]: For 76800/76802 co-relation queries the response was YES. [2024-06-20 16:29:27,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17125 conditions, 2778 events. 1705/2778 cut-off events. For 76800/76802 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15432 event pairs, 438 based on Foata normal form. 5/2782 useless extension candidates. Maximal degree in co-relation 17064. Up to 2373 conditions per place. [2024-06-20 16:29:27,224 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 137 selfloop transitions, 48 changer transitions 0/190 dead transitions. [2024-06-20 16:29:27,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2244 flow [2024-06-20 16:29:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:29:27,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:29:27,227 INFO L175 Difference]: Start difference. First operand has 138 places, 156 transitions, 1470 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:29:27,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2244 flow [2024-06-20 16:29:27,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 190 transitions, 2169 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:27,314 INFO L231 Difference]: Finished difference. Result has 143 places, 168 transitions, 1747 flow [2024-06-20 16:29:27,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1747, PETRI_PLACES=143, PETRI_TRANSITIONS=168} [2024-06-20 16:29:27,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-20 16:29:27,315 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 168 transitions, 1747 flow [2024-06-20 16:29:27,315 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) [2024-06-20 16:29:27,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:27,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:27,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:29:27,316 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:27,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash 903070645, now seen corresponding path program 3 times [2024-06-20 16:29:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:27,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967549252] [2024-06-20 16:29:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:27,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:27,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:27,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967549252] [2024-06-20 16:29:27,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967549252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:27,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:27,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:27,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811912322] [2024-06-20 16:29:27,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:27,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:27,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:27,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:28,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:28,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 168 transitions, 1747 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) [2024-06-20 16:29:28,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:28,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:28,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:28,541 INFO L124 PetriNetUnfolderBase]: 1700/2768 cut-off events. [2024-06-20 16:29:28,542 INFO L125 PetriNetUnfolderBase]: For 81804/81806 co-relation queries the response was YES. [2024-06-20 16:29:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17660 conditions, 2768 events. 1700/2768 cut-off events. For 81804/81806 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15302 event pairs, 433 based on Foata normal form. 5/2772 useless extension candidates. Maximal degree in co-relation 17597. Up to 2371 conditions per place. [2024-06-20 16:29:28,564 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 138 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-20 16:29:28,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 190 transitions, 2313 flow [2024-06-20 16:29:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:29:28,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:29:28,565 INFO L175 Difference]: Start difference. First operand has 143 places, 168 transitions, 1747 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:29:28,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 190 transitions, 2313 flow [2024-06-20 16:29:28,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 190 transitions, 2158 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:28,733 INFO L231 Difference]: Finished difference. Result has 148 places, 168 transitions, 1694 flow [2024-06-20 16:29:28,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1694, PETRI_PLACES=148, PETRI_TRANSITIONS=168} [2024-06-20 16:29:28,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-20 16:29:28,734 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 168 transitions, 1694 flow [2024-06-20 16:29:28,734 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) [2024-06-20 16:29:28,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:28,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:28,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:29:28,734 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:28,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash 148055472, now seen corresponding path program 1 times [2024-06-20 16:29:28,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:28,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315073947] [2024-06-20 16:29:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:28,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:29,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:29,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315073947] [2024-06-20 16:29:29,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315073947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:29,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:29,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:29,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130341534] [2024-06-20 16:29:29,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:29,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:29,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:29,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 168 transitions, 1694 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) [2024-06-20 16:29:29,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:29,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:29,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:30,142 INFO L124 PetriNetUnfolderBase]: 1705/2774 cut-off events. [2024-06-20 16:29:30,142 INFO L125 PetriNetUnfolderBase]: For 83910/83910 co-relation queries the response was YES. [2024-06-20 16:29:30,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17739 conditions, 2774 events. 1705/2774 cut-off events. For 83910/83910 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15350 event pairs, 444 based on Foata normal form. 1/2774 useless extension candidates. Maximal degree in co-relation 17674. Up to 2589 conditions per place. [2024-06-20 16:29:30,164 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 166 selfloop transitions, 17 changer transitions 0/188 dead transitions. [2024-06-20 16:29:30,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 188 transitions, 2162 flow [2024-06-20 16:29:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:29:30,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-20 16:29:30,166 INFO L175 Difference]: Start difference. First operand has 148 places, 168 transitions, 1694 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:29:30,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 188 transitions, 2162 flow [2024-06-20 16:29:30,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 188 transitions, 2046 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:29:30,258 INFO L231 Difference]: Finished difference. Result has 149 places, 171 transitions, 1684 flow [2024-06-20 16:29:30,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1684, PETRI_PLACES=149, PETRI_TRANSITIONS=171} [2024-06-20 16:29:30,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-20 16:29:30,259 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 171 transitions, 1684 flow [2024-06-20 16:29:30,259 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) [2024-06-20 16:29:30,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:30,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:29:30,260 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:30,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 286224146, now seen corresponding path program 3 times [2024-06-20 16:29:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992887328] [2024-06-20 16:29:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:30,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:30,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:30,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992887328] [2024-06-20 16:29:30,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992887328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:30,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:30,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945200422] [2024-06-20 16:29:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:30,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:30,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:30,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 171 transitions, 1684 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) [2024-06-20 16:29:30,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:30,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:30,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:31,508 INFO L124 PetriNetUnfolderBase]: 1691/2747 cut-off events. [2024-06-20 16:29:31,509 INFO L125 PetriNetUnfolderBase]: For 87002/87002 co-relation queries the response was YES. [2024-06-20 16:29:31,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17584 conditions, 2747 events. 1691/2747 cut-off events. For 87002/87002 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15136 event pairs, 447 based on Foata normal form. 2/2747 useless extension candidates. Maximal degree in co-relation 17519. Up to 2507 conditions per place. [2024-06-20 16:29:31,531 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 161 selfloop transitions, 25 changer transitions 0/191 dead transitions. [2024-06-20 16:29:31,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 191 transitions, 2142 flow [2024-06-20 16:29:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:29:31,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:29:31,533 INFO L175 Difference]: Start difference. First operand has 149 places, 171 transitions, 1684 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:29:31,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 191 transitions, 2142 flow [2024-06-20 16:29:31,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 191 transitions, 2042 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:31,624 INFO L231 Difference]: Finished difference. Result has 152 places, 173 transitions, 1666 flow [2024-06-20 16:29:31,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1666, PETRI_PLACES=152, PETRI_TRANSITIONS=173} [2024-06-20 16:29:31,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-20 16:29:31,624 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 173 transitions, 1666 flow [2024-06-20 16:29:31,625 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) [2024-06-20 16:29:31,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:31,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:31,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:29:31,625 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:31,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -740844272, now seen corresponding path program 4 times [2024-06-20 16:29:31,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:31,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393139525] [2024-06-20 16:29:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:31,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:32,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:32,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393139525] [2024-06-20 16:29:32,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393139525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:32,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:32,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:32,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698317426] [2024-06-20 16:29:32,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:32,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:32,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 173 transitions, 1666 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) [2024-06-20 16:29:32,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:32,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:32,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:32,752 INFO L124 PetriNetUnfolderBase]: 1701/2770 cut-off events. [2024-06-20 16:29:32,752 INFO L125 PetriNetUnfolderBase]: For 91362/91364 co-relation queries the response was YES. [2024-06-20 16:29:32,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17807 conditions, 2770 events. 1701/2770 cut-off events. For 91362/91364 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15391 event pairs, 415 based on Foata normal form. 2/2769 useless extension candidates. Maximal degree in co-relation 17740. Up to 2495 conditions per place. [2024-06-20 16:29:32,773 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 153 selfloop transitions, 33 changer transitions 0/191 dead transitions. [2024-06-20 16:29:32,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 191 transitions, 2133 flow [2024-06-20 16:29:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:29:32,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-20 16:29:32,775 INFO L175 Difference]: Start difference. First operand has 152 places, 173 transitions, 1666 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:29:32,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 191 transitions, 2133 flow [2024-06-20 16:29:32,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 191 transitions, 2002 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 16:29:32,855 INFO L231 Difference]: Finished difference. Result has 151 places, 177 transitions, 1681 flow [2024-06-20 16:29:32,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1681, PETRI_PLACES=151, PETRI_TRANSITIONS=177} [2024-06-20 16:29:32,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-20 16:29:32,856 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 177 transitions, 1681 flow [2024-06-20 16:29:32,856 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) [2024-06-20 16:29:32,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:32,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:29:32,857 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:32,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1257782710, now seen corresponding path program 5 times [2024-06-20 16:29:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086911372] [2024-06-20 16:29:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:33,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086911372] [2024-06-20 16:29:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086911372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:33,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:33,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:33,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782044120] [2024-06-20 16:29:33,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:33,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:33,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:33,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:33,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 177 transitions, 1681 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) [2024-06-20 16:29:33,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:33,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:33,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:34,005 INFO L124 PetriNetUnfolderBase]: 1705/2788 cut-off events. [2024-06-20 16:29:34,005 INFO L125 PetriNetUnfolderBase]: For 95582/95586 co-relation queries the response was YES. [2024-06-20 16:29:34,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17936 conditions, 2788 events. 1705/2788 cut-off events. For 95582/95586 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15562 event pairs, 427 based on Foata normal form. 6/2792 useless extension candidates. Maximal degree in co-relation 17866. Up to 2399 conditions per place. [2024-06-20 16:29:34,030 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 136 selfloop transitions, 52 changer transitions 0/193 dead transitions. [2024-06-20 16:29:34,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 2219 flow [2024-06-20 16:29:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:29:34,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:29:34,032 INFO L175 Difference]: Start difference. First operand has 151 places, 177 transitions, 1681 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:29:34,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 2219 flow [2024-06-20 16:29:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 193 transitions, 2140 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:34,142 INFO L231 Difference]: Finished difference. Result has 154 places, 180 transitions, 1762 flow [2024-06-20 16:29:34,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1762, PETRI_PLACES=154, PETRI_TRANSITIONS=180} [2024-06-20 16:29:34,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-20 16:29:34,143 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 180 transitions, 1762 flow [2024-06-20 16:29:34,144 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) [2024-06-20 16:29:34,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:34,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:29:34,144 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:34,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1631808806, now seen corresponding path program 6 times [2024-06-20 16:29:34,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:34,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045857653] [2024-06-20 16:29:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:34,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045857653] [2024-06-20 16:29:34,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045857653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:34,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:34,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:34,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349092035] [2024-06-20 16:29:34,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:34,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:34,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:34,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:34,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:34,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:34,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 180 transitions, 1762 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) [2024-06-20 16:29:34,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:35,199 INFO L124 PetriNetUnfolderBase]: 1695/2774 cut-off events. [2024-06-20 16:29:35,200 INFO L125 PetriNetUnfolderBase]: For 97233/97237 co-relation queries the response was YES. [2024-06-20 16:29:35,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17951 conditions, 2774 events. 1695/2774 cut-off events. For 97233/97237 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15507 event pairs, 431 based on Foata normal form. 4/2776 useless extension candidates. Maximal degree in co-relation 17880. Up to 2391 conditions per place. [2024-06-20 16:29:35,223 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 56 changer transitions 0/192 dead transitions. [2024-06-20 16:29:35,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 192 transitions, 2176 flow [2024-06-20 16:29:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:29:35,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:29:35,225 INFO L175 Difference]: Start difference. First operand has 154 places, 180 transitions, 1762 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:29:35,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 192 transitions, 2176 flow [2024-06-20 16:29:35,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 2040 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:35,333 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 1744 flow [2024-06-20 16:29:35,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-06-20 16:29:35,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-20 16:29:35,334 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 1744 flow [2024-06-20 16:29:35,334 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) [2024-06-20 16:29:35,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:35,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:35,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:29:35,335 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:35,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1287301478, now seen corresponding path program 2 times [2024-06-20 16:29:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:35,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205447559] [2024-06-20 16:29:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:36,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205447559] [2024-06-20 16:29:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205447559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:36,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:36,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949926349] [2024-06-20 16:29:36,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:36,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:36,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:36,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 1744 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) [2024-06-20 16:29:36,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:36,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:36,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:36,722 INFO L124 PetriNetUnfolderBase]: 1700/2765 cut-off events. [2024-06-20 16:29:36,722 INFO L125 PetriNetUnfolderBase]: For 100338/100338 co-relation queries the response was YES. [2024-06-20 16:29:36,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18049 conditions, 2765 events. 1700/2765 cut-off events. For 100338/100338 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15244 event pairs, 408 based on Foata normal form. 1/2765 useless extension candidates. Maximal degree in co-relation 17977. Up to 2589 conditions per place. [2024-06-20 16:29:36,746 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-06-20 16:29:36,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 195 transitions, 2221 flow [2024-06-20 16:29:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:29:36,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 16:29:36,750 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 1744 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:29:36,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 195 transitions, 2221 flow [2024-06-20 16:29:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 195 transitions, 2055 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 16:29:36,872 INFO L231 Difference]: Finished difference. Result has 158 places, 183 transitions, 1697 flow [2024-06-20 16:29:36,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1697, PETRI_PLACES=158, PETRI_TRANSITIONS=183} [2024-06-20 16:29:36,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-20 16:29:36,874 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 183 transitions, 1697 flow [2024-06-20 16:29:36,874 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) [2024-06-20 16:29:36,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:36,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:36,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:29:36,874 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:36,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:36,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1273968998, now seen corresponding path program 3 times [2024-06-20 16:29:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:36,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646796982] [2024-06-20 16:29:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:37,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:37,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646796982] [2024-06-20 16:29:37,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646796982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:37,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:37,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:37,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132192033] [2024-06-20 16:29:37,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:37,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:37,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:37,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 183 transitions, 1697 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) [2024-06-20 16:29:37,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:37,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:37,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:38,277 INFO L124 PetriNetUnfolderBase]: 1697/2763 cut-off events. [2024-06-20 16:29:38,277 INFO L125 PetriNetUnfolderBase]: For 103322/103328 co-relation queries the response was YES. [2024-06-20 16:29:38,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17989 conditions, 2763 events. 1697/2763 cut-off events. For 103322/103328 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15260 event pairs, 418 based on Foata normal form. 7/2769 useless extension candidates. Maximal degree in co-relation 17918. Up to 2563 conditions per place. [2024-06-20 16:29:38,298 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 29 changer transitions 0/197 dead transitions. [2024-06-20 16:29:38,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 197 transitions, 2182 flow [2024-06-20 16:29:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:29:38,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-20 16:29:38,299 INFO L175 Difference]: Start difference. First operand has 158 places, 183 transitions, 1697 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:29:38,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 197 transitions, 2182 flow [2024-06-20 16:29:38,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 197 transitions, 2087 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 16:29:38,400 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 1744 flow [2024-06-20 16:29:38,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1744, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-20 16:29:38,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-20 16:29:38,401 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 1744 flow [2024-06-20 16:29:38,402 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) [2024-06-20 16:29:38,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:38,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:38,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:29:38,403 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:38,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1273968595, now seen corresponding path program 4 times [2024-06-20 16:29:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:38,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348376212] [2024-06-20 16:29:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:39,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:39,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348376212] [2024-06-20 16:29:39,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348376212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:39,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:39,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:39,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289175323] [2024-06-20 16:29:39,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:39,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:39,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:39,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:39,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 1744 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) [2024-06-20 16:29:39,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:39,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:39,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:39,649 INFO L124 PetriNetUnfolderBase]: 1772/2881 cut-off events. [2024-06-20 16:29:39,650 INFO L125 PetriNetUnfolderBase]: For 118594/118598 co-relation queries the response was YES. [2024-06-20 16:29:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19446 conditions, 2881 events. 1772/2881 cut-off events. For 118594/118598 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16127 event pairs, 436 based on Foata normal form. 5/2884 useless extension candidates. Maximal degree in co-relation 19374. Up to 2294 conditions per place. [2024-06-20 16:29:39,672 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 137 selfloop transitions, 75 changer transitions 0/217 dead transitions. [2024-06-20 16:29:39,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 217 transitions, 2788 flow [2024-06-20 16:29:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:29:39,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:29:39,673 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 1744 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:29:39,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 217 transitions, 2788 flow [2024-06-20 16:29:39,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 217 transitions, 2668 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:39,824 INFO L231 Difference]: Finished difference. Result has 162 places, 197 transitions, 2016 flow [2024-06-20 16:29:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2016, PETRI_PLACES=162, PETRI_TRANSITIONS=197} [2024-06-20 16:29:39,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-20 16:29:39,825 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 197 transitions, 2016 flow [2024-06-20 16:29:39,825 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) [2024-06-20 16:29:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:29:39,825 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:39,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1273957435, now seen corresponding path program 5 times [2024-06-20 16:29:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023386652] [2024-06-20 16:29:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:40,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023386652] [2024-06-20 16:29:40,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023386652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:40,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:40,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945327097] [2024-06-20 16:29:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:40,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:40,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:40,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 197 transitions, 2016 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) [2024-06-20 16:29:40,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:40,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:40,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:41,138 INFO L124 PetriNetUnfolderBase]: 1795/2918 cut-off events. [2024-06-20 16:29:41,138 INFO L125 PetriNetUnfolderBase]: For 128252/128256 co-relation queries the response was YES. [2024-06-20 16:29:41,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20543 conditions, 2918 events. 1795/2918 cut-off events. For 128252/128256 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16363 event pairs, 435 based on Foata normal form. 5/2921 useless extension candidates. Maximal degree in co-relation 20469. Up to 2317 conditions per place. [2024-06-20 16:29:41,163 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 86 changer transitions 0/223 dead transitions. [2024-06-20 16:29:41,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 223 transitions, 2983 flow [2024-06-20 16:29:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:29:41,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:29:41,164 INFO L175 Difference]: Start difference. First operand has 162 places, 197 transitions, 2016 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:29:41,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 223 transitions, 2983 flow [2024-06-20 16:29:41,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 223 transitions, 2816 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:41,325 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 2287 flow [2024-06-20 16:29:41,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2287, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2024-06-20 16:29:41,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-20 16:29:41,326 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 2287 flow [2024-06-20 16:29:41,326 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) [2024-06-20 16:29:41,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:41,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:41,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:29:41,327 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:41,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1286855605, now seen corresponding path program 6 times [2024-06-20 16:29:41,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682794958] [2024-06-20 16:29:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:41,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:41,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682794958] [2024-06-20 16:29:41,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682794958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:41,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721373357] [2024-06-20 16:29:41,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:41,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:42,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:42,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 2287 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) [2024-06-20 16:29:42,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:42,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:42,532 INFO L124 PetriNetUnfolderBase]: 1790/2914 cut-off events. [2024-06-20 16:29:42,532 INFO L125 PetriNetUnfolderBase]: For 131692/131694 co-relation queries the response was YES. [2024-06-20 16:29:42,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20818 conditions, 2914 events. 1790/2914 cut-off events. For 131692/131694 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16362 event pairs, 416 based on Foata normal form. 5/2918 useless extension candidates. Maximal degree in co-relation 20741. Up to 2644 conditions per place. [2024-06-20 16:29:42,557 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 184 selfloop transitions, 33 changer transitions 0/222 dead transitions. [2024-06-20 16:29:42,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 222 transitions, 2862 flow [2024-06-20 16:29:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:29:42,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:29:42,558 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 2287 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:29:42,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 222 transitions, 2862 flow [2024-06-20 16:29:42,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 222 transitions, 2643 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:42,711 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2142 flow [2024-06-20 16:29:42,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2142, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-20 16:29:42,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-20 16:29:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2142 flow [2024-06-20 16:29:42,712 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) [2024-06-20 16:29:42,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:42,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:42,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:29:42,712 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:42,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1285046738, now seen corresponding path program 1 times [2024-06-20 16:29:42,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:42,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048273008] [2024-06-20 16:29:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:42,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:43,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:43,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048273008] [2024-06-20 16:29:43,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048273008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:43,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:43,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717546520] [2024-06-20 16:29:43,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:43,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:43,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:43,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2142 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) [2024-06-20 16:29:43,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:44,158 INFO L124 PetriNetUnfolderBase]: 1800/2927 cut-off events. [2024-06-20 16:29:44,158 INFO L125 PetriNetUnfolderBase]: For 134535/134535 co-relation queries the response was YES. [2024-06-20 16:29:44,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20790 conditions, 2927 events. 1800/2927 cut-off events. For 134535/134535 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16407 event pairs, 417 based on Foata normal form. 2/2928 useless extension candidates. Maximal degree in co-relation 20711. Up to 2717 conditions per place. [2024-06-20 16:29:44,185 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 18 changer transitions 0/226 dead transitions. [2024-06-20 16:29:44,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 226 transitions, 2689 flow [2024-06-20 16:29:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:29:44,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-20 16:29:44,187 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2142 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:29:44,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 226 transitions, 2689 flow [2024-06-20 16:29:44,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2489 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 16:29:44,393 INFO L231 Difference]: Finished difference. Result has 172 places, 210 transitions, 2049 flow [2024-06-20 16:29:44,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2049, PETRI_PLACES=172, PETRI_TRANSITIONS=210} [2024-06-20 16:29:44,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 16:29:44,393 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 210 transitions, 2049 flow [2024-06-20 16:29:44,394 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) [2024-06-20 16:29:44,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:44,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:44,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:29:44,394 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:44,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1279890680, now seen corresponding path program 2 times [2024-06-20 16:29:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:44,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765630520] [2024-06-20 16:29:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:44,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:45,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765630520] [2024-06-20 16:29:45,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765630520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:45,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:45,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:45,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066762922] [2024-06-20 16:29:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:45,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:45,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 210 transitions, 2049 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) [2024-06-20 16:29:45,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:45,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:45,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:45,810 INFO L124 PetriNetUnfolderBase]: 1820/2958 cut-off events. [2024-06-20 16:29:45,810 INFO L125 PetriNetUnfolderBase]: For 139886/139888 co-relation queries the response was YES. [2024-06-20 16:29:45,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21080 conditions, 2958 events. 1820/2958 cut-off events. For 139886/139888 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16612 event pairs, 419 based on Foata normal form. 4/2961 useless extension candidates. Maximal degree in co-relation 21003. Up to 2719 conditions per place. [2024-06-20 16:29:45,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 195 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-20 16:29:45,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 231 transitions, 2640 flow [2024-06-20 16:29:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:29:45,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:29:45,836 INFO L175 Difference]: Start difference. First operand has 172 places, 210 transitions, 2049 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:29:45,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 231 transitions, 2640 flow [2024-06-20 16:29:45,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 231 transitions, 2550 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:45,982 INFO L231 Difference]: Finished difference. Result has 174 places, 217 transitions, 2122 flow [2024-06-20 16:29:45,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2122, PETRI_PLACES=174, PETRI_TRANSITIONS=217} [2024-06-20 16:29:45,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-20 16:29:45,983 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 217 transitions, 2122 flow [2024-06-20 16:29:45,983 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) [2024-06-20 16:29:45,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:45,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:45,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:29:45,984 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash -533910034, now seen corresponding path program 3 times [2024-06-20 16:29:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:45,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776233984] [2024-06-20 16:29:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:45,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:46,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:46,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776233984] [2024-06-20 16:29:46,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776233984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:46,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:46,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726144136] [2024-06-20 16:29:46,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:46,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:46,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:46,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 217 transitions, 2122 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) [2024-06-20 16:29:46,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:46,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:46,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:47,393 INFO L124 PetriNetUnfolderBase]: 1833/2976 cut-off events. [2024-06-20 16:29:47,393 INFO L125 PetriNetUnfolderBase]: For 146416/146418 co-relation queries the response was YES. [2024-06-20 16:29:47,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21771 conditions, 2976 events. 1833/2976 cut-off events. For 146416/146418 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16717 event pairs, 419 based on Foata normal form. 3/2978 useless extension candidates. Maximal degree in co-relation 21693. Up to 2717 conditions per place. [2024-06-20 16:29:47,419 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 190 selfloop transitions, 45 changer transitions 0/240 dead transitions. [2024-06-20 16:29:47,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 240 transitions, 2867 flow [2024-06-20 16:29:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:29:47,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-20 16:29:47,421 INFO L175 Difference]: Start difference. First operand has 174 places, 217 transitions, 2122 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:29:47,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 240 transitions, 2867 flow [2024-06-20 16:29:47,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 240 transitions, 2756 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:47,623 INFO L231 Difference]: Finished difference. Result has 179 places, 224 transitions, 2256 flow [2024-06-20 16:29:47,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2256, PETRI_PLACES=179, PETRI_TRANSITIONS=224} [2024-06-20 16:29:47,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-20 16:29:47,624 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 224 transitions, 2256 flow [2024-06-20 16:29:47,624 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) [2024-06-20 16:29:47,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:47,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:47,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:29:47,624 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:47,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1279688870, now seen corresponding path program 4 times [2024-06-20 16:29:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:47,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151663694] [2024-06-20 16:29:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:47,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151663694] [2024-06-20 16:29:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151663694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:48,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589762337] [2024-06-20 16:29:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:48,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:48,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:48,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 224 transitions, 2256 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) [2024-06-20 16:29:48,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:48,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:48,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:48,883 INFO L124 PetriNetUnfolderBase]: 1830/2974 cut-off events. [2024-06-20 16:29:48,883 INFO L125 PetriNetUnfolderBase]: For 153569/153571 co-relation queries the response was YES. [2024-06-20 16:29:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22361 conditions, 2974 events. 1830/2974 cut-off events. For 153569/153571 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16692 event pairs, 419 based on Foata normal form. 3/2976 useless extension candidates. Maximal degree in co-relation 22281. Up to 2755 conditions per place. [2024-06-20 16:29:48,909 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 27 changer transitions 0/250 dead transitions. [2024-06-20 16:29:48,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 250 transitions, 2965 flow [2024-06-20 16:29:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:29:48,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-20 16:29:48,910 INFO L175 Difference]: Start difference. First operand has 179 places, 224 transitions, 2256 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:29:48,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 250 transitions, 2965 flow [2024-06-20 16:29:49,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 250 transitions, 2867 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:49,110 INFO L231 Difference]: Finished difference. Result has 185 places, 238 transitions, 2447 flow [2024-06-20 16:29:49,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2447, PETRI_PLACES=185, PETRI_TRANSITIONS=238} [2024-06-20 16:29:49,111 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-20 16:29:49,111 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 238 transitions, 2447 flow [2024-06-20 16:29:49,111 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) [2024-06-20 16:29:49,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:49,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:49,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:29:49,112 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:49,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1073588, now seen corresponding path program 1 times [2024-06-20 16:29:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254939557] [2024-06-20 16:29:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:49,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254939557] [2024-06-20 16:29:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254939557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:49,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:49,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:49,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475598003] [2024-06-20 16:29:49,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:49,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:49,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 238 transitions, 2447 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) [2024-06-20 16:29:49,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:49,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:49,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:50,234 INFO L124 PetriNetUnfolderBase]: 1866/3034 cut-off events. [2024-06-20 16:29:50,234 INFO L125 PetriNetUnfolderBase]: For 167618/167620 co-relation queries the response was YES. [2024-06-20 16:29:50,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23023 conditions, 3034 events. 1866/3034 cut-off events. For 167618/167620 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16992 event pairs, 325 based on Foata normal form. 12/3045 useless extension candidates. Maximal degree in co-relation 22938. Up to 2676 conditions per place. [2024-06-20 16:29:50,261 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 241 selfloop transitions, 26 changer transitions 0/272 dead transitions. [2024-06-20 16:29:50,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 272 transitions, 3175 flow [2024-06-20 16:29:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:29:50,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-20 16:29:50,262 INFO L175 Difference]: Start difference. First operand has 185 places, 238 transitions, 2447 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:29:50,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 272 transitions, 3175 flow [2024-06-20 16:29:50,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 3095 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 16:29:50,521 INFO L231 Difference]: Finished difference. Result has 192 places, 242 transitions, 2513 flow [2024-06-20 16:29:50,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2513, PETRI_PLACES=192, PETRI_TRANSITIONS=242} [2024-06-20 16:29:50,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 16:29:50,522 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 242 transitions, 2513 flow [2024-06-20 16:29:50,522 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) [2024-06-20 16:29:50,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:50,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:50,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:29:50,523 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:50,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:50,523 INFO L85 PathProgramCache]: Analyzing trace with hash -601618696, now seen corresponding path program 2 times [2024-06-20 16:29:50,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:50,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899796723] [2024-06-20 16:29:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:50,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:51,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899796723] [2024-06-20 16:29:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899796723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:51,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:51,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140633203] [2024-06-20 16:29:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:51,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:51,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:51,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 242 transitions, 2513 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) [2024-06-20 16:29:51,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:51,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:51,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:51,827 INFO L124 PetriNetUnfolderBase]: 1910/3106 cut-off events. [2024-06-20 16:29:51,827 INFO L125 PetriNetUnfolderBase]: For 178562/178564 co-relation queries the response was YES. [2024-06-20 16:29:51,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23928 conditions, 3106 events. 1910/3106 cut-off events. For 178562/178564 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17534 event pairs, 429 based on Foata normal form. 14/3119 useless extension candidates. Maximal degree in co-relation 23840. Up to 2775 conditions per place. [2024-06-20 16:29:51,859 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 27 changer transitions 0/272 dead transitions. [2024-06-20 16:29:51,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 272 transitions, 3245 flow [2024-06-20 16:29:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:29:51,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-20 16:29:51,861 INFO L175 Difference]: Start difference. First operand has 192 places, 242 transitions, 2513 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:29:51,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 272 transitions, 3245 flow [2024-06-20 16:29:52,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 272 transitions, 3145 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:52,128 INFO L231 Difference]: Finished difference. Result has 195 places, 244 transitions, 2533 flow [2024-06-20 16:29:52,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2533, PETRI_PLACES=195, PETRI_TRANSITIONS=244} [2024-06-20 16:29:52,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-20 16:29:52,128 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 244 transitions, 2533 flow [2024-06-20 16:29:52,129 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) [2024-06-20 16:29:52,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:52,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:52,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:29:52,129 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:52,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 7508204, now seen corresponding path program 1 times [2024-06-20 16:29:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:52,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257718860] [2024-06-20 16:29:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:52,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257718860] [2024-06-20 16:29:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257718860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:52,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:52,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425857579] [2024-06-20 16:29:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:52,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:53,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:53,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 244 transitions, 2533 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) [2024-06-20 16:29:53,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:53,732 INFO L124 PetriNetUnfolderBase]: 1920/3124 cut-off events. [2024-06-20 16:29:53,732 INFO L125 PetriNetUnfolderBase]: For 172676/172678 co-relation queries the response was YES. [2024-06-20 16:29:53,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24158 conditions, 3124 events. 1920/3124 cut-off events. For 172676/172678 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 17675 event pairs, 430 based on Foata normal form. 4/3127 useless extension candidates. Maximal degree in co-relation 24069. Up to 2828 conditions per place. [2024-06-20 16:29:53,763 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 239 selfloop transitions, 33 changer transitions 0/277 dead transitions. [2024-06-20 16:29:53,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 277 transitions, 3316 flow [2024-06-20 16:29:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:29:53,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:29:53,765 INFO L175 Difference]: Start difference. First operand has 195 places, 244 transitions, 2533 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:29:53,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 277 transitions, 3316 flow [2024-06-20 16:29:54,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 3221 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:54,049 INFO L231 Difference]: Finished difference. Result has 200 places, 254 transitions, 2712 flow [2024-06-20 16:29:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2712, PETRI_PLACES=200, PETRI_TRANSITIONS=254} [2024-06-20 16:29:54,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-20 16:29:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 254 transitions, 2712 flow [2024-06-20 16:29:54,050 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) [2024-06-20 16:29:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:29:54,050 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:54,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash 117256264, now seen corresponding path program 1 times [2024-06-20 16:29:54,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:54,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115548491] [2024-06-20 16:29:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:54,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:54,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:54,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115548491] [2024-06-20 16:29:54,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115548491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:54,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:54,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:54,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565166503] [2024-06-20 16:29:54,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:54,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:54,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:54,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:54,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 254 transitions, 2712 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) [2024-06-20 16:29:54,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:54,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:54,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:55,580 INFO L124 PetriNetUnfolderBase]: 1930/3137 cut-off events. [2024-06-20 16:29:55,581 INFO L125 PetriNetUnfolderBase]: For 179363/179363 co-relation queries the response was YES. [2024-06-20 16:29:55,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24710 conditions, 3137 events. 1930/3137 cut-off events. For 179363/179363 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17700 event pairs, 432 based on Foata normal form. 2/3137 useless extension candidates. Maximal degree in co-relation 24618. Up to 2781 conditions per place. [2024-06-20 16:29:55,611 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 237 selfloop transitions, 38 changer transitions 0/280 dead transitions. [2024-06-20 16:29:55,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 280 transitions, 3405 flow [2024-06-20 16:29:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:29:55,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:29:55,612 INFO L175 Difference]: Start difference. First operand has 200 places, 254 transitions, 2712 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:29:55,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 280 transitions, 3405 flow [2024-06-20 16:29:55,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 280 transitions, 3243 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:55,840 INFO L231 Difference]: Finished difference. Result has 203 places, 258 transitions, 2725 flow [2024-06-20 16:29:55,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2725, PETRI_PLACES=203, PETRI_TRANSITIONS=258} [2024-06-20 16:29:55,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 16:29:55,840 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 258 transitions, 2725 flow [2024-06-20 16:29:55,840 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) [2024-06-20 16:29:55,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:55,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:55,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:29:55,841 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:55,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash -483407698, now seen corresponding path program 1 times [2024-06-20 16:29:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238359417] [2024-06-20 16:29:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238359417] [2024-06-20 16:29:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238359417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:56,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409588041] [2024-06-20 16:29:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:56,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:56,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:56,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 258 transitions, 2725 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) [2024-06-20 16:29:56,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:56,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:56,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:57,215 INFO L124 PetriNetUnfolderBase]: 1950/3168 cut-off events. [2024-06-20 16:29:57,216 INFO L125 PetriNetUnfolderBase]: For 189231/189233 co-relation queries the response was YES. [2024-06-20 16:29:57,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25285 conditions, 3168 events. 1950/3168 cut-off events. For 189231/189233 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17948 event pairs, 420 based on Foata normal form. 6/3173 useless extension candidates. Maximal degree in co-relation 25192. Up to 2860 conditions per place. [2024-06-20 16:29:57,250 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 250 selfloop transitions, 28 changer transitions 0/283 dead transitions. [2024-06-20 16:29:57,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 283 transitions, 3441 flow [2024-06-20 16:29:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:29:57,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:29:57,251 INFO L175 Difference]: Start difference. First operand has 203 places, 258 transitions, 2725 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:29:57,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 283 transitions, 3441 flow [2024-06-20 16:29:57,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 283 transitions, 3277 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 16:29:57,497 INFO L231 Difference]: Finished difference. Result has 204 places, 262 transitions, 2705 flow [2024-06-20 16:29:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=204, PETRI_TRANSITIONS=262} [2024-06-20 16:29:57,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-20 16:29:57,498 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 262 transitions, 2705 flow [2024-06-20 16:29:57,498 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) [2024-06-20 16:29:57,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:57,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:29:57,498 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash -306039028, now seen corresponding path program 2 times [2024-06-20 16:29:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802458488] [2024-06-20 16:29:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:58,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:58,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802458488] [2024-06-20 16:29:58,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802458488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:58,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:58,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085578655] [2024-06-20 16:29:58,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:58,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:58,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:58,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 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) [2024-06-20 16:29:58,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:58,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:58,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:58,828 INFO L124 PetriNetUnfolderBase]: 1970/3198 cut-off events. [2024-06-20 16:29:58,828 INFO L125 PetriNetUnfolderBase]: For 195841/195843 co-relation queries the response was YES. [2024-06-20 16:29:58,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25592 conditions, 3198 events. 1970/3198 cut-off events. For 195841/195843 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18120 event pairs, 415 based on Foata normal form. 6/3203 useless extension candidates. Maximal degree in co-relation 25498. Up to 2748 conditions per place. [2024-06-20 16:29:58,858 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 221 selfloop transitions, 60 changer transitions 0/286 dead transitions. [2024-06-20 16:29:58,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 286 transitions, 3553 flow [2024-06-20 16:29:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:29:58,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-20 16:29:58,860 INFO L175 Difference]: Start difference. First operand has 204 places, 262 transitions, 2705 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:29:58,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 286 transitions, 3553 flow [2024-06-20 16:29:59,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 286 transitions, 3460 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:59,178 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 2825 flow [2024-06-20 16:29:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2825, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-06-20 16:29:59,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 16:29:59,179 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 2825 flow [2024-06-20 16:29:59,179 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) [2024-06-20 16:29:59,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:59,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:29:59,179 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:59,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash 294507940, now seen corresponding path program 3 times [2024-06-20 16:29:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176649676] [2024-06-20 16:29:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176649676] [2024-06-20 16:29:59,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176649676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:59,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:59,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376748873] [2024-06-20 16:29:59,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:59,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:59,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:59,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:59,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:29:59,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 2825 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) [2024-06-20 16:29:59,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:59,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:29:59,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:00,448 INFO L124 PetriNetUnfolderBase]: 1974/3212 cut-off events. [2024-06-20 16:30:00,448 INFO L125 PetriNetUnfolderBase]: For 200717/200719 co-relation queries the response was YES. [2024-06-20 16:30:00,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25749 conditions, 3212 events. 1974/3212 cut-off events. For 200717/200719 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18308 event pairs, 427 based on Foata normal form. 6/3217 useless extension candidates. Maximal degree in co-relation 25654. Up to 2749 conditions per place. [2024-06-20 16:30:00,483 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 223 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-20 16:30:00,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 289 transitions, 3673 flow [2024-06-20 16:30:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:30:00,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:30:00,485 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 2825 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:30:00,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 289 transitions, 3673 flow [2024-06-20 16:30:00,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 289 transitions, 3539 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:00,807 INFO L231 Difference]: Finished difference. Result has 209 places, 269 transitions, 2895 flow [2024-06-20 16:30:00,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2895, PETRI_PLACES=209, PETRI_TRANSITIONS=269} [2024-06-20 16:30:00,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-20 16:30:00,808 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 269 transitions, 2895 flow [2024-06-20 16:30:00,808 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) [2024-06-20 16:30:00,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:00,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:00,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:30:00,808 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:00,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash 294384622, now seen corresponding path program 3 times [2024-06-20 16:30:00,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:00,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705311203] [2024-06-20 16:30:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:00,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:01,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:01,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705311203] [2024-06-20 16:30:01,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705311203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:01,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:01,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:01,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980786925] [2024-06-20 16:30:01,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:01,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:01,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:01,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 269 transitions, 2895 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) [2024-06-20 16:30:01,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:01,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:01,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:02,212 INFO L124 PetriNetUnfolderBase]: 2018/3284 cut-off events. [2024-06-20 16:30:02,212 INFO L125 PetriNetUnfolderBase]: For 220385/220387 co-relation queries the response was YES. [2024-06-20 16:30:02,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26291 conditions, 3284 events. 2018/3284 cut-off events. For 220385/220387 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18770 event pairs, 421 based on Foata normal form. 14/3297 useless extension candidates. Maximal degree in co-relation 26195. Up to 2879 conditions per place. [2024-06-20 16:30:02,247 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 41 changer transitions 0/294 dead transitions. [2024-06-20 16:30:02,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 294 transitions, 3684 flow [2024-06-20 16:30:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:30:02,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-20 16:30:02,248 INFO L175 Difference]: Start difference. First operand has 209 places, 269 transitions, 2895 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:30:02,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 294 transitions, 3684 flow [2024-06-20 16:30:02,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 294 transitions, 3554 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:02,647 INFO L231 Difference]: Finished difference. Result has 212 places, 271 transitions, 2921 flow [2024-06-20 16:30:02,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2921, PETRI_PLACES=212, PETRI_TRANSITIONS=271} [2024-06-20 16:30:02,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 16:30:02,648 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 271 transitions, 2921 flow [2024-06-20 16:30:02,648 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) [2024-06-20 16:30:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:30:02,648 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:02,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 294741494, now seen corresponding path program 2 times [2024-06-20 16:30:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540911945] [2024-06-20 16:30:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:03,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:03,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540911945] [2024-06-20 16:30:03,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540911945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:03,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:03,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:03,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503273371] [2024-06-20 16:30:03,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:03,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:03,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:03,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:03,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:03,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:03,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 271 transitions, 2921 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) [2024-06-20 16:30:03,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:03,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:03,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:04,156 INFO L124 PetriNetUnfolderBase]: 2030/3299 cut-off events. [2024-06-20 16:30:04,156 INFO L125 PetriNetUnfolderBase]: For 212639/212641 co-relation queries the response was YES. [2024-06-20 16:30:04,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26558 conditions, 3299 events. 2030/3299 cut-off events. For 212639/212641 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18859 event pairs, 419 based on Foata normal form. 4/3302 useless extension candidates. Maximal degree in co-relation 26461. Up to 2910 conditions per place. [2024-06-20 16:30:04,192 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 260 selfloop transitions, 56 changer transitions 0/321 dead transitions. [2024-06-20 16:30:04,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 321 transitions, 4172 flow [2024-06-20 16:30:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:30:04,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:30:04,194 INFO L175 Difference]: Start difference. First operand has 212 places, 271 transitions, 2921 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:30:04,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 321 transitions, 4172 flow [2024-06-20 16:30:04,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 321 transitions, 4029 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:04,602 INFO L231 Difference]: Finished difference. Result has 218 places, 300 transitions, 3434 flow [2024-06-20 16:30:04,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3434, PETRI_PLACES=218, PETRI_TRANSITIONS=300} [2024-06-20 16:30:04,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 16:30:04,603 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 300 transitions, 3434 flow [2024-06-20 16:30:04,603 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) [2024-06-20 16:30:04,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:04,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:30:04,603 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:04,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash 294395534, now seen corresponding path program 3 times [2024-06-20 16:30:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:04,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905929016] [2024-06-20 16:30:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:04,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:05,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:05,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905929016] [2024-06-20 16:30:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905929016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:05,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:05,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:05,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560924683] [2024-06-20 16:30:05,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:05,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:05,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:05,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 300 transitions, 3434 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) [2024-06-20 16:30:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:06,262 INFO L124 PetriNetUnfolderBase]: 2045/3318 cut-off events. [2024-06-20 16:30:06,262 INFO L125 PetriNetUnfolderBase]: For 222165/222167 co-relation queries the response was YES. [2024-06-20 16:30:06,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27373 conditions, 3318 events. 2045/3318 cut-off events. For 222165/222167 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18947 event pairs, 419 based on Foata normal form. 5/3322 useless extension candidates. Maximal degree in co-relation 27272. Up to 2846 conditions per place. [2024-06-20 16:30:06,297 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 233 selfloop transitions, 87 changer transitions 0/325 dead transitions. [2024-06-20 16:30:06,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 325 transitions, 4419 flow [2024-06-20 16:30:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:30:06,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-20 16:30:06,299 INFO L175 Difference]: Start difference. First operand has 218 places, 300 transitions, 3434 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:30:06,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 325 transitions, 4419 flow [2024-06-20 16:30:06,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 325 transitions, 4241 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-20 16:30:06,680 INFO L231 Difference]: Finished difference. Result has 224 places, 305 transitions, 3613 flow [2024-06-20 16:30:06,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3613, PETRI_PLACES=224, PETRI_TRANSITIONS=305} [2024-06-20 16:30:06,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 16:30:06,681 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 305 transitions, 3613 flow [2024-06-20 16:30:06,681 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) [2024-06-20 16:30:06,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:06,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:06,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:30:06,682 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:06,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash -306030100, now seen corresponding path program 1 times [2024-06-20 16:30:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:06,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028318575] [2024-06-20 16:30:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:06,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:07,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:07,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028318575] [2024-06-20 16:30:07,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028318575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:07,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:07,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:07,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324105959] [2024-06-20 16:30:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:07,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:07,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:07,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 305 transitions, 3613 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) [2024-06-20 16:30:07,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:07,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:07,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:08,371 INFO L124 PetriNetUnfolderBase]: 2053/3329 cut-off events. [2024-06-20 16:30:08,371 INFO L125 PetriNetUnfolderBase]: For 230557/230557 co-relation queries the response was YES. [2024-06-20 16:30:08,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28123 conditions, 3329 events. 2053/3329 cut-off events. For 230557/230557 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18957 event pairs, 419 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 28020. Up to 3090 conditions per place. [2024-06-20 16:30:08,405 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 302 selfloop transitions, 19 changer transitions 0/326 dead transitions. [2024-06-20 16:30:08,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 326 transitions, 4395 flow [2024-06-20 16:30:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:30:08,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:30:08,406 INFO L175 Difference]: Start difference. First operand has 224 places, 305 transitions, 3613 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:30:08,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 326 transitions, 4395 flow [2024-06-20 16:30:08,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 326 transitions, 4096 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:08,735 INFO L231 Difference]: Finished difference. Result has 226 places, 307 transitions, 3449 flow [2024-06-20 16:30:08,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3449, PETRI_PLACES=226, PETRI_TRANSITIONS=307} [2024-06-20 16:30:08,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-20 16:30:08,737 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 307 transitions, 3449 flow [2024-06-20 16:30:08,737 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) [2024-06-20 16:30:08,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:08,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:30:08,737 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:08,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 294753584, now seen corresponding path program 4 times [2024-06-20 16:30:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572834515] [2024-06-20 16:30:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:09,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572834515] [2024-06-20 16:30:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572834515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:09,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314609414] [2024-06-20 16:30:09,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:09,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:09,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:09,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:09,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:09,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 307 transitions, 3449 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) [2024-06-20 16:30:09,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:09,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:09,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:10,513 INFO L124 PetriNetUnfolderBase]: 2081/3376 cut-off events. [2024-06-20 16:30:10,513 INFO L125 PetriNetUnfolderBase]: For 241007/241009 co-relation queries the response was YES. [2024-06-20 16:30:10,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28524 conditions, 3376 events. 2081/3376 cut-off events. For 241007/241009 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19335 event pairs, 420 based on Foata normal form. 4/3379 useless extension candidates. Maximal degree in co-relation 28420. Up to 2931 conditions per place. [2024-06-20 16:30:10,551 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 269 selfloop transitions, 65 changer transitions 0/339 dead transitions. [2024-06-20 16:30:10,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 339 transitions, 4660 flow [2024-06-20 16:30:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:30:10,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-20 16:30:10,553 INFO L175 Difference]: Start difference. First operand has 226 places, 307 transitions, 3449 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:30:10,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 339 transitions, 4660 flow [2024-06-20 16:30:10,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 339 transitions, 4541 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:10,930 INFO L231 Difference]: Finished difference. Result has 229 places, 317 transitions, 3738 flow [2024-06-20 16:30:10,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3738, PETRI_PLACES=229, PETRI_TRANSITIONS=317} [2024-06-20 16:30:10,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 16:30:10,932 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 317 transitions, 3738 flow [2024-06-20 16:30:10,932 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) [2024-06-20 16:30:10,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:10,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:10,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:30:10,932 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:10,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash 184761618, now seen corresponding path program 2 times [2024-06-20 16:30:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:10,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470199441] [2024-06-20 16:30:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:11,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:11,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470199441] [2024-06-20 16:30:11,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470199441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:11,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:11,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:11,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62807917] [2024-06-20 16:30:11,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:11,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:11,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:11,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:11,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 317 transitions, 3738 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) [2024-06-20 16:30:11,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:11,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:11,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:12,504 INFO L124 PetriNetUnfolderBase]: 2086/3372 cut-off events. [2024-06-20 16:30:12,505 INFO L125 PetriNetUnfolderBase]: For 249991/249993 co-relation queries the response was YES. [2024-06-20 16:30:12,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29253 conditions, 3372 events. 2086/3372 cut-off events. For 249991/249993 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19278 event pairs, 446 based on Foata normal form. 1/3368 useless extension candidates. Maximal degree in co-relation 29147. Up to 3010 conditions per place. [2024-06-20 16:30:12,541 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 40 changer transitions 0/339 dead transitions. [2024-06-20 16:30:12,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 339 transitions, 4536 flow [2024-06-20 16:30:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:30:12,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:30:12,543 INFO L175 Difference]: Start difference. First operand has 229 places, 317 transitions, 3738 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:30:12,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 339 transitions, 4536 flow [2024-06-20 16:30:13,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 339 transitions, 4329 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:13,029 INFO L231 Difference]: Finished difference. Result has 232 places, 320 transitions, 3705 flow [2024-06-20 16:30:13,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3705, PETRI_PLACES=232, PETRI_TRANSITIONS=320} [2024-06-20 16:30:13,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 16:30:13,030 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 320 transitions, 3705 flow [2024-06-20 16:30:13,030 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) [2024-06-20 16:30:13,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:13,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:30:13,031 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:13,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2058708818, now seen corresponding path program 4 times [2024-06-20 16:30:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730624836] [2024-06-20 16:30:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:13,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730624836] [2024-06-20 16:30:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730624836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:13,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:13,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:13,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575482804] [2024-06-20 16:30:13,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:13,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:13,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:13,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 320 transitions, 3705 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) [2024-06-20 16:30:13,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:13,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:13,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:14,428 INFO L124 PetriNetUnfolderBase]: 2074/3359 cut-off events. [2024-06-20 16:30:14,429 INFO L125 PetriNetUnfolderBase]: For 252631/252633 co-relation queries the response was YES. [2024-06-20 16:30:14,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28999 conditions, 3359 events. 2074/3359 cut-off events. For 252631/252633 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19214 event pairs, 438 based on Foata normal form. 2/3358 useless extension candidates. Maximal degree in co-relation 28891. Up to 3055 conditions per place. [2024-06-20 16:30:14,463 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 303 selfloop transitions, 30 changer transitions 0/338 dead transitions. [2024-06-20 16:30:14,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 338 transitions, 4433 flow [2024-06-20 16:30:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:30:14,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:30:14,465 INFO L175 Difference]: Start difference. First operand has 232 places, 320 transitions, 3705 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:30:14,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 338 transitions, 4433 flow [2024-06-20 16:30:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 338 transitions, 4225 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:14,998 INFO L231 Difference]: Finished difference. Result has 234 places, 320 transitions, 3572 flow [2024-06-20 16:30:14,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3572, PETRI_PLACES=234, PETRI_TRANSITIONS=320} [2024-06-20 16:30:14,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 16:30:14,999 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 320 transitions, 3572 flow [2024-06-20 16:30:15,000 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) [2024-06-20 16:30:15,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:15,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:15,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:30:15,000 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:15,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash 661415006, now seen corresponding path program 3 times [2024-06-20 16:30:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:15,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359786351] [2024-06-20 16:30:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:15,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:15,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359786351] [2024-06-20 16:30:15,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359786351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:15,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:15,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066172601] [2024-06-20 16:30:15,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:15,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:15,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:15,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 320 transitions, 3572 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) [2024-06-20 16:30:15,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:15,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:15,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:16,553 INFO L124 PetriNetUnfolderBase]: 2079/3360 cut-off events. [2024-06-20 16:30:16,553 INFO L125 PetriNetUnfolderBase]: For 257073/257075 co-relation queries the response was YES. [2024-06-20 16:30:16,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29001 conditions, 3360 events. 2079/3360 cut-off events. For 257073/257075 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19219 event pairs, 446 based on Foata normal form. 1/3356 useless extension candidates. Maximal degree in co-relation 28892. Up to 3000 conditions per place. [2024-06-20 16:30:16,588 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 41 changer transitions 0/342 dead transitions. [2024-06-20 16:30:16,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 342 transitions, 4382 flow [2024-06-20 16:30:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:30:16,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:30:16,590 INFO L175 Difference]: Start difference. First operand has 234 places, 320 transitions, 3572 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:30:16,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 342 transitions, 4382 flow [2024-06-20 16:30:17,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 4089 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-20 16:30:17,060 INFO L231 Difference]: Finished difference. Result has 232 places, 323 transitions, 3461 flow [2024-06-20 16:30:17,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3461, PETRI_PLACES=232, PETRI_TRANSITIONS=323} [2024-06-20 16:30:17,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 16:30:17,061 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 323 transitions, 3461 flow [2024-06-20 16:30:17,061 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) [2024-06-20 16:30:17,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:17,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:17,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:30:17,061 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:17,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 672842846, now seen corresponding path program 4 times [2024-06-20 16:30:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:17,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104892110] [2024-06-20 16:30:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:17,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:17,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:17,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104892110] [2024-06-20 16:30:17,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104892110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:17,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:17,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:17,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661220006] [2024-06-20 16:30:17,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:17,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:17,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:17,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 323 transitions, 3461 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) [2024-06-20 16:30:17,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:17,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:17,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:18,528 INFO L124 PetriNetUnfolderBase]: 2076/3356 cut-off events. [2024-06-20 16:30:18,529 INFO L125 PetriNetUnfolderBase]: For 263013/263015 co-relation queries the response was YES. [2024-06-20 16:30:18,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29165 conditions, 3356 events. 2076/3356 cut-off events. For 263013/263015 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19177 event pairs, 446 based on Foata normal form. 1/3352 useless extension candidates. Maximal degree in co-relation 29055. Up to 2981 conditions per place. [2024-06-20 16:30:18,637 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 53 changer transitions 0/345 dead transitions. [2024-06-20 16:30:18,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 345 transitions, 4307 flow [2024-06-20 16:30:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:30:18,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-20 16:30:18,638 INFO L175 Difference]: Start difference. First operand has 232 places, 323 transitions, 3461 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:30:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 345 transitions, 4307 flow [2024-06-20 16:30:19,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 345 transitions, 4147 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:19,125 INFO L231 Difference]: Finished difference. Result has 235 places, 329 transitions, 3566 flow [2024-06-20 16:30:19,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3566, PETRI_PLACES=235, PETRI_TRANSITIONS=329} [2024-06-20 16:30:19,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 16:30:19,126 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 329 transitions, 3566 flow [2024-06-20 16:30:19,126 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) [2024-06-20 16:30:19,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:19,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:19,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:30:19,127 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:19,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 787909142, now seen corresponding path program 5 times [2024-06-20 16:30:19,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:19,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208532799] [2024-06-20 16:30:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:19,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208532799] [2024-06-20 16:30:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208532799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:19,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285708273] [2024-06-20 16:30:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:19,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:19,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 329 transitions, 3566 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) [2024-06-20 16:30:19,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:19,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:19,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:20,669 INFO L124 PetriNetUnfolderBase]: 2086/3378 cut-off events. [2024-06-20 16:30:20,669 INFO L125 PetriNetUnfolderBase]: For 274234/274234 co-relation queries the response was YES. [2024-06-20 16:30:20,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29662 conditions, 3378 events. 2086/3378 cut-off events. For 274234/274234 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19300 event pairs, 416 based on Foata normal form. 2/3379 useless extension candidates. Maximal degree in co-relation 29550. Up to 3135 conditions per place. [2024-06-20 16:30:20,716 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 323 selfloop transitions, 20 changer transitions 0/348 dead transitions. [2024-06-20 16:30:20,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 348 transitions, 4379 flow [2024-06-20 16:30:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:30:20,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-20 16:30:20,721 INFO L175 Difference]: Start difference. First operand has 235 places, 329 transitions, 3566 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:30:20,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 348 transitions, 4379 flow [2024-06-20 16:30:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 348 transitions, 4226 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:21,274 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 3531 flow [2024-06-20 16:30:21,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3531, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-06-20 16:30:21,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-20 16:30:21,274 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 3531 flow [2024-06-20 16:30:21,275 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) [2024-06-20 16:30:21,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:21,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:21,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:30:21,275 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:21,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash 787897052, now seen corresponding path program 6 times [2024-06-20 16:30:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:21,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22907002] [2024-06-20 16:30:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:21,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:21,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:21,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22907002] [2024-06-20 16:30:21,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22907002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:21,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:21,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:21,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486347097] [2024-06-20 16:30:21,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:21,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:21,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:22,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:22,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 3531 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) [2024-06-20 16:30:22,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:22,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:22,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:22,771 INFO L124 PetriNetUnfolderBase]: 2096/3394 cut-off events. [2024-06-20 16:30:22,772 INFO L125 PetriNetUnfolderBase]: For 281646/281648 co-relation queries the response was YES. [2024-06-20 16:30:22,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29869 conditions, 3394 events. 2096/3394 cut-off events. For 281646/281648 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19472 event pairs, 427 based on Foata normal form. 2/3393 useless extension candidates. Maximal degree in co-relation 29755. Up to 3020 conditions per place. [2024-06-20 16:30:22,811 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 292 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-20 16:30:22,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 352 transitions, 4381 flow [2024-06-20 16:30:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:30:22,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 16:30:22,812 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 3531 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:30:22,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 352 transitions, 4381 flow [2024-06-20 16:30:23,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 352 transitions, 4298 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:23,365 INFO L231 Difference]: Finished difference. Result has 241 places, 335 transitions, 3638 flow [2024-06-20 16:30:23,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3638, PETRI_PLACES=241, PETRI_TRANSITIONS=335} [2024-06-20 16:30:23,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 16:30:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 335 transitions, 3638 flow [2024-06-20 16:30:23,366 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) [2024-06-20 16:30:23,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:23,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:30:23,366 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 620370722, now seen corresponding path program 7 times [2024-06-20 16:30:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338596701] [2024-06-20 16:30:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338596701] [2024-06-20 16:30:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338596701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:24,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:24,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:24,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706072963] [2024-06-20 16:30:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:24,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:24,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:24,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 335 transitions, 3638 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) [2024-06-20 16:30:24,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:24,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:24,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:25,068 INFO L124 PetriNetUnfolderBase]: 2122/3433 cut-off events. [2024-06-20 16:30:25,068 INFO L125 PetriNetUnfolderBase]: For 294588/294590 co-relation queries the response was YES. [2024-06-20 16:30:25,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30600 conditions, 3433 events. 2122/3433 cut-off events. For 294588/294590 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 19652 event pairs, 419 based on Foata normal form. 4/3436 useless extension candidates. Maximal degree in co-relation 30485. Up to 3091 conditions per place. [2024-06-20 16:30:25,109 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 303 selfloop transitions, 53 changer transitions 0/361 dead transitions. [2024-06-20 16:30:25,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 361 transitions, 4863 flow [2024-06-20 16:30:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:30:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:30:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:30:25,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 16:30:25,110 INFO L175 Difference]: Start difference. First operand has 241 places, 335 transitions, 3638 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:30:25,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 361 transitions, 4863 flow [2024-06-20 16:30:25,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 361 transitions, 4713 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:25,749 INFO L231 Difference]: Finished difference. Result has 245 places, 341 transitions, 3745 flow [2024-06-20 16:30:25,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3745, PETRI_PLACES=245, PETRI_TRANSITIONS=341} [2024-06-20 16:30:25,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-20 16:30:25,750 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 341 transitions, 3745 flow [2024-06-20 16:30:25,750 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) [2024-06-20 16:30:25,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:25,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:30:25,750 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:25,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1237823338, now seen corresponding path program 8 times [2024-06-20 16:30:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491378808] [2024-06-20 16:30:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:26,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491378808] [2024-06-20 16:30:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491378808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022302138] [2024-06-20 16:30:26,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:26,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:26,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:26,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:26,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 341 transitions, 3745 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) [2024-06-20 16:30:26,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:26,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:26,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:27,339 INFO L124 PetriNetUnfolderBase]: 2110/3411 cut-off events. [2024-06-20 16:30:27,340 INFO L125 PetriNetUnfolderBase]: For 297167/297169 co-relation queries the response was YES. [2024-06-20 16:30:27,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30213 conditions, 3411 events. 2110/3411 cut-off events. For 297167/297169 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19457 event pairs, 416 based on Foata normal form. 6/3416 useless extension candidates. Maximal degree in co-relation 30097. Up to 3083 conditions per place. [2024-06-20 16:30:27,381 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 301 selfloop transitions, 51 changer transitions 0/357 dead transitions. [2024-06-20 16:30:27,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 357 transitions, 4664 flow [2024-06-20 16:30:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:30:27,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:30:27,383 INFO L175 Difference]: Start difference. First operand has 245 places, 341 transitions, 3745 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:30:27,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 357 transitions, 4664 flow [2024-06-20 16:30:28,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 357 transitions, 4482 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:28,071 INFO L231 Difference]: Finished difference. Result has 247 places, 341 transitions, 3673 flow [2024-06-20 16:30:28,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3673, PETRI_PLACES=247, PETRI_TRANSITIONS=341} [2024-06-20 16:30:28,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 16:30:28,071 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 341 transitions, 3673 flow [2024-06-20 16:30:28,071 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) [2024-06-20 16:30:28,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:28,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:28,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:30:28,072 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:28,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash 838095388, now seen corresponding path program 9 times [2024-06-20 16:30:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741512709] [2024-06-20 16:30:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:28,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:28,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741512709] [2024-06-20 16:30:28,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741512709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:28,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:28,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141444121] [2024-06-20 16:30:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:28,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:28,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:28,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 341 transitions, 3673 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) [2024-06-20 16:30:28,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:28,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:28,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:29,423 INFO L124 PetriNetUnfolderBase]: 2130/3446 cut-off events. [2024-06-20 16:30:29,424 INFO L125 PetriNetUnfolderBase]: For 304569/304573 co-relation queries the response was YES. [2024-06-20 16:30:29,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30455 conditions, 3446 events. 2130/3446 cut-off events. For 304569/304573 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19785 event pairs, 440 based on Foata normal form. 6/3450 useless extension candidates. Maximal degree in co-relation 30338. Up to 2739 conditions per place. [2024-06-20 16:30:29,464 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 226 selfloop transitions, 129 changer transitions 0/360 dead transitions. [2024-06-20 16:30:29,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 360 transitions, 4829 flow [2024-06-20 16:30:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:30:29,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:30:29,466 INFO L175 Difference]: Start difference. First operand has 247 places, 341 transitions, 3673 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:30:29,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 360 transitions, 4829 flow [2024-06-20 16:30:29,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 360 transitions, 4727 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:29,953 INFO L231 Difference]: Finished difference. Result has 248 places, 345 transitions, 3926 flow [2024-06-20 16:30:29,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3926, PETRI_PLACES=248, PETRI_TRANSITIONS=345} [2024-06-20 16:30:29,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-20 16:30:29,954 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 345 transitions, 3926 flow [2024-06-20 16:30:29,954 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) [2024-06-20 16:30:29,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:29,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:29,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:30:29,955 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:29,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash 214922342, now seen corresponding path program 10 times [2024-06-20 16:30:29,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:29,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059711242] [2024-06-20 16:30:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:30,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059711242] [2024-06-20 16:30:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059711242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:30,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824466351] [2024-06-20 16:30:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:30,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:30,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 345 transitions, 3926 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) [2024-06-20 16:30:30,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:30,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:30,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:31,439 INFO L124 PetriNetUnfolderBase]: 2134/3454 cut-off events. [2024-06-20 16:30:31,440 INFO L125 PetriNetUnfolderBase]: For 310156/310160 co-relation queries the response was YES. [2024-06-20 16:30:31,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30850 conditions, 3454 events. 2134/3454 cut-off events. For 310156/310160 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19892 event pairs, 447 based on Foata normal form. 6/3458 useless extension candidates. Maximal degree in co-relation 30732. Up to 2740 conditions per place. [2024-06-20 16:30:31,481 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 223 selfloop transitions, 134 changer transitions 0/362 dead transitions. [2024-06-20 16:30:31,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 362 transitions, 4944 flow [2024-06-20 16:30:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:30:31,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-20 16:30:31,491 INFO L175 Difference]: Start difference. First operand has 248 places, 345 transitions, 3926 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:30:31,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 362 transitions, 4944 flow [2024-06-20 16:30:32,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 362 transitions, 4658 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:32,148 INFO L231 Difference]: Finished difference. Result has 251 places, 348 transitions, 3997 flow [2024-06-20 16:30:32,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3997, PETRI_PLACES=251, PETRI_TRANSITIONS=348} [2024-06-20 16:30:32,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-20 16:30:32,149 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 348 transitions, 3997 flow [2024-06-20 16:30:32,149 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) [2024-06-20 16:30:32,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:32,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:32,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:30:32,149 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:32,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1015232488, now seen corresponding path program 11 times [2024-06-20 16:30:32,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:32,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216495484] [2024-06-20 16:30:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:32,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216495484] [2024-06-20 16:30:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216495484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:32,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172253235] [2024-06-20 16:30:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:32,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:33,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:33,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 348 transitions, 3997 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) [2024-06-20 16:30:33,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:33,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:33,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:33,719 INFO L124 PetriNetUnfolderBase]: 2124/3439 cut-off events. [2024-06-20 16:30:33,719 INFO L125 PetriNetUnfolderBase]: For 307322/307324 co-relation queries the response was YES. [2024-06-20 16:30:33,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30618 conditions, 3439 events. 2124/3439 cut-off events. For 307322/307324 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19800 event pairs, 423 based on Foata normal form. 4/3442 useless extension candidates. Maximal degree in co-relation 30499. Up to 3163 conditions per place. [2024-06-20 16:30:33,756 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 317 selfloop transitions, 38 changer transitions 0/360 dead transitions. [2024-06-20 16:30:33,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 4756 flow [2024-06-20 16:30:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:30:33,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-20 16:30:33,758 INFO L175 Difference]: Start difference. First operand has 251 places, 348 transitions, 3997 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:30:33,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 4756 flow [2024-06-20 16:30:34,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 360 transitions, 4445 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:34,419 INFO L231 Difference]: Finished difference. Result has 254 places, 348 transitions, 3769 flow [2024-06-20 16:30:34,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3769, PETRI_PLACES=254, PETRI_TRANSITIONS=348} [2024-06-20 16:30:34,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-20 16:30:34,419 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 348 transitions, 3769 flow [2024-06-20 16:30:34,419 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) [2024-06-20 16:30:34,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:34,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:34,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:30:34,420 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:34,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1015220398, now seen corresponding path program 12 times [2024-06-20 16:30:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265418714] [2024-06-20 16:30:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:35,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:35,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265418714] [2024-06-20 16:30:35,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265418714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:35,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:35,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693311717] [2024-06-20 16:30:35,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:35,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:35,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 348 transitions, 3769 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) [2024-06-20 16:30:35,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:35,793 INFO L124 PetriNetUnfolderBase]: 2114/3420 cut-off events. [2024-06-20 16:30:35,793 INFO L125 PetriNetUnfolderBase]: For 307798/307802 co-relation queries the response was YES. [2024-06-20 16:30:35,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29958 conditions, 3420 events. 2114/3420 cut-off events. For 307798/307802 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19608 event pairs, 449 based on Foata normal form. 4/3422 useless extension candidates. Maximal degree in co-relation 29838. Up to 2724 conditions per place. [2024-06-20 16:30:35,831 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 213 selfloop transitions, 146 changer transitions 0/364 dead transitions. [2024-06-20 16:30:35,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 364 transitions, 4607 flow [2024-06-20 16:30:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:30:35,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 16:30:35,833 INFO L175 Difference]: Start difference. First operand has 254 places, 348 transitions, 3769 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:30:35,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 364 transitions, 4607 flow [2024-06-20 16:30:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 364 transitions, 4431 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 16:30:36,563 INFO L231 Difference]: Finished difference. Result has 254 places, 348 transitions, 3891 flow [2024-06-20 16:30:36,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3891, PETRI_PLACES=254, PETRI_TRANSITIONS=348} [2024-06-20 16:30:36,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-20 16:30:36,564 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 348 transitions, 3891 flow [2024-06-20 16:30:36,564 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) [2024-06-20 16:30:36,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:36,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:30:36,565 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:36,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash 837965560, now seen corresponding path program 4 times [2024-06-20 16:30:36,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:36,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999807194] [2024-06-20 16:30:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:37,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:37,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999807194] [2024-06-20 16:30:37,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999807194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:37,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:37,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:37,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326363701] [2024-06-20 16:30:37,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:37,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:37,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:37,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:37,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 348 transitions, 3891 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) [2024-06-20 16:30:37,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:37,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:37,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:38,075 INFO L124 PetriNetUnfolderBase]: 2145/3475 cut-off events. [2024-06-20 16:30:38,075 INFO L125 PetriNetUnfolderBase]: For 337161/337165 co-relation queries the response was YES. [2024-06-20 16:30:38,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30542 conditions, 3475 events. 2145/3475 cut-off events. For 337161/337165 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20025 event pairs, 440 based on Foata normal form. 14/3487 useless extension candidates. Maximal degree in co-relation 30421. Up to 2999 conditions per place. [2024-06-20 16:30:38,118 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 68 changer transitions 0/369 dead transitions. [2024-06-20 16:30:38,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 369 transitions, 4859 flow [2024-06-20 16:30:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:30:38,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-20 16:30:38,119 INFO L175 Difference]: Start difference. First operand has 254 places, 348 transitions, 3891 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:30:38,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 369 transitions, 4859 flow [2024-06-20 16:30:38,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 369 transitions, 4406 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 16:30:38,725 INFO L231 Difference]: Finished difference. Result has 252 places, 350 transitions, 3666 flow [2024-06-20 16:30:38,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3666, PETRI_PLACES=252, PETRI_TRANSITIONS=350} [2024-06-20 16:30:38,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-20 16:30:38,725 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 350 transitions, 3666 flow [2024-06-20 16:30:38,725 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) [2024-06-20 16:30:38,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:38,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:38,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:30:38,726 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:38,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 614653206, now seen corresponding path program 5 times [2024-06-20 16:30:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:38,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903670756] [2024-06-20 16:30:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:38,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:39,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:39,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903670756] [2024-06-20 16:30:39,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903670756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:39,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:39,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:39,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515342983] [2024-06-20 16:30:39,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:39,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:39,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:39,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:39,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 350 transitions, 3666 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) [2024-06-20 16:30:39,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:39,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:39,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:40,489 INFO L124 PetriNetUnfolderBase]: 2155/3480 cut-off events. [2024-06-20 16:30:40,489 INFO L125 PetriNetUnfolderBase]: For 319972/319974 co-relation queries the response was YES. [2024-06-20 16:30:40,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30586 conditions, 3480 events. 2155/3480 cut-off events. For 319972/319974 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19952 event pairs, 426 based on Foata normal form. 4/3483 useless extension candidates. Maximal degree in co-relation 30464. Up to 3203 conditions per place. [2024-06-20 16:30:40,531 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 331 selfloop transitions, 46 changer transitions 0/382 dead transitions. [2024-06-20 16:30:40,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 382 transitions, 4714 flow [2024-06-20 16:30:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:30:40,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-20 16:30:40,533 INFO L175 Difference]: Start difference. First operand has 252 places, 350 transitions, 3666 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:30:40,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 382 transitions, 4714 flow [2024-06-20 16:30:41,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 382 transitions, 4524 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:41,343 INFO L231 Difference]: Finished difference. Result has 258 places, 370 transitions, 3906 flow [2024-06-20 16:30:41,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3906, PETRI_PLACES=258, PETRI_TRANSITIONS=370} [2024-06-20 16:30:41,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-20 16:30:41,344 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 370 transitions, 3906 flow [2024-06-20 16:30:41,344 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) [2024-06-20 16:30:41,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:41,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:41,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:30:41,345 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:41,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash 628950530, now seen corresponding path program 2 times [2024-06-20 16:30:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:41,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275997019] [2024-06-20 16:30:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275997019] [2024-06-20 16:30:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275997019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:42,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:42,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239246145] [2024-06-20 16:30:42,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:42,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:42,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:42,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:42,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 370 transitions, 3906 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) [2024-06-20 16:30:42,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:42,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:42,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:43,173 INFO L124 PetriNetUnfolderBase]: 2176/3510 cut-off events. [2024-06-20 16:30:43,174 INFO L125 PetriNetUnfolderBase]: For 336839/336839 co-relation queries the response was YES. [2024-06-20 16:30:43,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31546 conditions, 3510 events. 2176/3510 cut-off events. For 336839/336839 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20101 event pairs, 422 based on Foata normal form. 2/3511 useless extension candidates. Maximal degree in co-relation 31420. Up to 3260 conditions per place. [2024-06-20 16:30:43,216 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 360 selfloop transitions, 25 changer transitions 0/390 dead transitions. [2024-06-20 16:30:43,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 390 transitions, 5075 flow [2024-06-20 16:30:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:30:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:30:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 16:30:43,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-20 16:30:43,218 INFO L175 Difference]: Start difference. First operand has 258 places, 370 transitions, 3906 flow. Second operand 10 states and 162 transitions. [2024-06-20 16:30:43,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 390 transitions, 5075 flow [2024-06-20 16:30:43,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 390 transitions, 4909 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-06-20 16:30:43,814 INFO L231 Difference]: Finished difference. Result has 266 places, 374 transitions, 4011 flow [2024-06-20 16:30:43,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4011, PETRI_PLACES=266, PETRI_TRANSITIONS=374} [2024-06-20 16:30:43,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 16:30:43,814 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 374 transitions, 4011 flow [2024-06-20 16:30:43,815 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) [2024-06-20 16:30:43,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:43,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:43,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:30:43,815 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:43,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash 614665730, now seen corresponding path program 3 times [2024-06-20 16:30:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:43,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488359539] [2024-06-20 16:30:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488359539] [2024-06-20 16:30:44,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488359539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:44,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246221564] [2024-06-20 16:30:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:44,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:44,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:44,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 374 transitions, 4011 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) [2024-06-20 16:30:44,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:44,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:44,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:45,670 INFO L124 PetriNetUnfolderBase]: 2189/3529 cut-off events. [2024-06-20 16:30:45,671 INFO L125 PetriNetUnfolderBase]: For 347404/347404 co-relation queries the response was YES. [2024-06-20 16:30:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31819 conditions, 3529 events. 2189/3529 cut-off events. For 347404/347404 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20197 event pairs, 424 based on Foata normal form. 2/3530 useless extension candidates. Maximal degree in co-relation 31691. Up to 3301 conditions per place. [2024-06-20 16:30:45,713 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 368 selfloop transitions, 19 changer transitions 0/392 dead transitions. [2024-06-20 16:30:45,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 392 transitions, 4946 flow [2024-06-20 16:30:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:30:45,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 16:30:45,715 INFO L175 Difference]: Start difference. First operand has 266 places, 374 transitions, 4011 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:30:45,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 392 transitions, 4946 flow [2024-06-20 16:30:46,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 392 transitions, 4780 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:46,453 INFO L231 Difference]: Finished difference. Result has 270 places, 379 transitions, 4030 flow [2024-06-20 16:30:46,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4030, PETRI_PLACES=270, PETRI_TRANSITIONS=379} [2024-06-20 16:30:46,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-20 16:30:46,453 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 379 transitions, 4030 flow [2024-06-20 16:30:46,454 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) [2024-06-20 16:30:46,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:46,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:46,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:30:46,454 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:46,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1237831832, now seen corresponding path program 6 times [2024-06-20 16:30:46,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:46,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353229810] [2024-06-20 16:30:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:46,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:47,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353229810] [2024-06-20 16:30:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353229810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:47,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:47,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899391765] [2024-06-20 16:30:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:47,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:47,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:47,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 379 transitions, 4030 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) [2024-06-20 16:30:47,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:47,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:48,213 INFO L124 PetriNetUnfolderBase]: 2217/3574 cut-off events. [2024-06-20 16:30:48,214 INFO L125 PetriNetUnfolderBase]: For 358929/358931 co-relation queries the response was YES. [2024-06-20 16:30:48,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32386 conditions, 3574 events. 2217/3574 cut-off events. For 358929/358931 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20542 event pairs, 428 based on Foata normal form. 4/3577 useless extension candidates. Maximal degree in co-relation 32255. Up to 3262 conditions per place. [2024-06-20 16:30:48,258 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 346 selfloop transitions, 49 changer transitions 0/400 dead transitions. [2024-06-20 16:30:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 400 transitions, 5263 flow [2024-06-20 16:30:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:30:48,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:30:48,259 INFO L175 Difference]: Start difference. First operand has 270 places, 379 transitions, 4030 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:30:48,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 400 transitions, 5263 flow [2024-06-20 16:30:49,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 400 transitions, 5148 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:49,169 INFO L231 Difference]: Finished difference. Result has 274 places, 387 transitions, 4305 flow [2024-06-20 16:30:49,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4305, PETRI_PLACES=274, PETRI_TRANSITIONS=387} [2024-06-20 16:30:49,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 16:30:49,170 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 387 transitions, 4305 flow [2024-06-20 16:30:49,170 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) [2024-06-20 16:30:49,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:49,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:49,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:30:49,170 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:49,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 838334522, now seen corresponding path program 7 times [2024-06-20 16:30:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:49,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875755190] [2024-06-20 16:30:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:50,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:50,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875755190] [2024-06-20 16:30:50,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875755190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:50,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:50,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:50,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159230316] [2024-06-20 16:30:50,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:50,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 387 transitions, 4305 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) [2024-06-20 16:30:50,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:50,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:50,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:50,912 INFO L124 PetriNetUnfolderBase]: 2253/3636 cut-off events. [2024-06-20 16:30:50,912 INFO L125 PetriNetUnfolderBase]: For 381690/381694 co-relation queries the response was YES. [2024-06-20 16:30:50,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33886 conditions, 3636 events. 2253/3636 cut-off events. For 381690/381694 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21022 event pairs, 440 based on Foata normal form. 4/3638 useless extension candidates. Maximal degree in co-relation 33753. Up to 3080 conditions per place. [2024-06-20 16:30:50,954 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 337 selfloop transitions, 94 changer transitions 0/436 dead transitions. [2024-06-20 16:30:50,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 436 transitions, 5940 flow [2024-06-20 16:30:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:30:50,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:30:50,956 INFO L175 Difference]: Start difference. First operand has 274 places, 387 transitions, 4305 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:30:50,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 436 transitions, 5940 flow [2024-06-20 16:30:51,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 436 transitions, 5716 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:51,977 INFO L231 Difference]: Finished difference. Result has 281 places, 413 transitions, 4822 flow [2024-06-20 16:30:51,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4822, PETRI_PLACES=281, PETRI_TRANSITIONS=413} [2024-06-20 16:30:51,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-20 16:30:51,978 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 413 transitions, 4822 flow [2024-06-20 16:30:51,978 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) [2024-06-20 16:30:51,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:51,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:51,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:30:51,979 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:51,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 628475300, now seen corresponding path program 4 times [2024-06-20 16:30:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:51,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337444903] [2024-06-20 16:30:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:52,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337444903] [2024-06-20 16:30:52,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337444903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:52,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586211445] [2024-06-20 16:30:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:52,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:52,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:52,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 413 transitions, 4822 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) [2024-06-20 16:30:52,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:52,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:52,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:53,837 INFO L124 PetriNetUnfolderBase]: 2248/3629 cut-off events. [2024-06-20 16:30:53,837 INFO L125 PetriNetUnfolderBase]: For 388906/388906 co-relation queries the response was YES. [2024-06-20 16:30:53,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34235 conditions, 3629 events. 2248/3629 cut-off events. For 388906/388906 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20933 event pairs, 407 based on Foata normal form. 2/3630 useless extension candidates. Maximal degree in co-relation 34097. Up to 3377 conditions per place. [2024-06-20 16:30:53,880 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 397 selfloop transitions, 25 changer transitions 0/427 dead transitions. [2024-06-20 16:30:53,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 427 transitions, 5701 flow [2024-06-20 16:30:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:30:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:30:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 16:30:53,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:30:53,881 INFO L175 Difference]: Start difference. First operand has 281 places, 413 transitions, 4822 flow. Second operand 10 states and 160 transitions. [2024-06-20 16:30:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 427 transitions, 5701 flow [2024-06-20 16:30:54,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 427 transitions, 5342 flow, removed 149 selfloop flow, removed 3 redundant places. [2024-06-20 16:30:54,738 INFO L231 Difference]: Finished difference. Result has 288 places, 413 transitions, 4518 flow [2024-06-20 16:30:54,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4518, PETRI_PLACES=288, PETRI_TRANSITIONS=413} [2024-06-20 16:30:54,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-20 16:30:54,738 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 413 transitions, 4518 flow [2024-06-20 16:30:54,738 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) [2024-06-20 16:30:54,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:54,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:30:54,739 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:54,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash 628474866, now seen corresponding path program 8 times [2024-06-20 16:30:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:54,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939229010] [2024-06-20 16:30:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:54,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:55,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:55,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939229010] [2024-06-20 16:30:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939229010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35997661] [2024-06-20 16:30:55,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:55,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:55,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:55,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:55,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 413 transitions, 4518 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) [2024-06-20 16:30:55,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:55,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:55,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:56,902 INFO L124 PetriNetUnfolderBase]: 2275/3664 cut-off events. [2024-06-20 16:30:56,902 INFO L125 PetriNetUnfolderBase]: For 396610/396612 co-relation queries the response was YES. [2024-06-20 16:30:56,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34287 conditions, 3664 events. 2275/3664 cut-off events. For 396610/396612 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21082 event pairs, 410 based on Foata normal form. 5/3668 useless extension candidates. Maximal degree in co-relation 34147. Up to 3214 conditions per place. [2024-06-20 16:30:56,948 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 323 selfloop transitions, 111 changer transitions 0/439 dead transitions. [2024-06-20 16:30:56,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 439 transitions, 6099 flow [2024-06-20 16:30:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:30:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:30:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-20 16:30:56,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-20 16:30:56,950 INFO L175 Difference]: Start difference. First operand has 288 places, 413 transitions, 4518 flow. Second operand 11 states and 192 transitions. [2024-06-20 16:30:56,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 439 transitions, 6099 flow [2024-06-20 16:30:58,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 439 transitions, 6023 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:30:58,045 INFO L231 Difference]: Finished difference. Result has 290 places, 423 transitions, 5086 flow [2024-06-20 16:30:58,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5086, PETRI_PLACES=290, PETRI_TRANSITIONS=423} [2024-06-20 16:30:58,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-20 16:30:58,046 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 423 transitions, 5086 flow [2024-06-20 16:30:58,046 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) [2024-06-20 16:30:58,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:58,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:30:58,047 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:58,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash 837976472, now seen corresponding path program 9 times [2024-06-20 16:30:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:58,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141508835] [2024-06-20 16:30:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:58,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:59,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141508835] [2024-06-20 16:30:59,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141508835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:59,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:59,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729521636] [2024-06-20 16:30:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:59,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:30:59,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 423 transitions, 5086 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) [2024-06-20 16:30:59,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:59,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:30:59,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:00,026 INFO L124 PetriNetUnfolderBase]: 2290/3686 cut-off events. [2024-06-20 16:31:00,026 INFO L125 PetriNetUnfolderBase]: For 416768/416772 co-relation queries the response was YES. [2024-06-20 16:31:00,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35540 conditions, 3686 events. 2290/3686 cut-off events. For 416768/416772 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21248 event pairs, 440 based on Foata normal form. 5/3689 useless extension candidates. Maximal degree in co-relation 35399. Up to 2969 conditions per place. [2024-06-20 16:31:00,072 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 267 selfloop transitions, 172 changer transitions 0/444 dead transitions. [2024-06-20 16:31:00,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 444 transitions, 6240 flow [2024-06-20 16:31:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:31:00,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:31:00,073 INFO L175 Difference]: Start difference. First operand has 290 places, 423 transitions, 5086 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:31:00,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 444 transitions, 6240 flow [2024-06-20 16:31:01,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 444 transitions, 5818 flow, removed 118 selfloop flow, removed 10 redundant places. [2024-06-20 16:31:01,165 INFO L231 Difference]: Finished difference. Result has 289 places, 430 transitions, 5266 flow [2024-06-20 16:31:01,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4668, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5266, PETRI_PLACES=289, PETRI_TRANSITIONS=430} [2024-06-20 16:31:01,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-20 16:31:01,166 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 430 transitions, 5266 flow [2024-06-20 16:31:01,166 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) [2024-06-20 16:31:01,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:01,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:01,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:31:01,167 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:01,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash 215168420, now seen corresponding path program 5 times [2024-06-20 16:31:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:01,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234297973] [2024-06-20 16:31:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:02,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234297973] [2024-06-20 16:31:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234297973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:02,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:02,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488936648] [2024-06-20 16:31:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:02,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:02,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 430 transitions, 5266 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) [2024-06-20 16:31:02,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:02,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:02,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:03,023 INFO L124 PetriNetUnfolderBase]: 2285/3679 cut-off events. [2024-06-20 16:31:03,024 INFO L125 PetriNetUnfolderBase]: For 403941/403947 co-relation queries the response was YES. [2024-06-20 16:31:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35009 conditions, 3679 events. 2285/3679 cut-off events. For 403941/403947 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21191 event pairs, 412 based on Foata normal form. 8/3686 useless extension candidates. Maximal degree in co-relation 34869. Up to 3408 conditions per place. [2024-06-20 16:31:03,067 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 31 changer transitions 0/445 dead transitions. [2024-06-20 16:31:03,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 445 transitions, 6301 flow [2024-06-20 16:31:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:31:03,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 16:31:03,068 INFO L175 Difference]: Start difference. First operand has 289 places, 430 transitions, 5266 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:31:03,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 445 transitions, 6301 flow [2024-06-20 16:31:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 445 transitions, 5764 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:04,031 INFO L231 Difference]: Finished difference. Result has 291 places, 432 transitions, 4922 flow [2024-06-20 16:31:04,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4922, PETRI_PLACES=291, PETRI_TRANSITIONS=432} [2024-06-20 16:31:04,032 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-20 16:31:04,032 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 432 transitions, 4922 flow [2024-06-20 16:31:04,032 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) [2024-06-20 16:31:04,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:04,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:04,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:31:04,033 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:04,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash 838322432, now seen corresponding path program 10 times [2024-06-20 16:31:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860952569] [2024-06-20 16:31:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860952569] [2024-06-20 16:31:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860952569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:04,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:04,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058702595] [2024-06-20 16:31:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:05,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:05,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 432 transitions, 4922 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) [2024-06-20 16:31:05,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:05,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:05,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:06,032 INFO L124 PetriNetUnfolderBase]: 2292/3689 cut-off events. [2024-06-20 16:31:06,032 INFO L125 PetriNetUnfolderBase]: For 412258/412262 co-relation queries the response was YES. [2024-06-20 16:31:06,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34627 conditions, 3689 events. 2292/3689 cut-off events. For 412258/412262 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21264 event pairs, 439 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 34486. Up to 2972 conditions per place. [2024-06-20 16:31:06,082 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 283 selfloop transitions, 163 changer transitions 0/451 dead transitions. [2024-06-20 16:31:06,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 451 transitions, 6090 flow [2024-06-20 16:31:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:31:06,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:31:06,084 INFO L175 Difference]: Start difference. First operand has 291 places, 432 transitions, 4922 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:31:06,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 451 transitions, 6090 flow [2024-06-20 16:31:07,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 451 transitions, 5913 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:07,343 INFO L231 Difference]: Finished difference. Result has 293 places, 439 transitions, 5341 flow [2024-06-20 16:31:07,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5341, PETRI_PLACES=293, PETRI_TRANSITIONS=439} [2024-06-20 16:31:07,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-20 16:31:07,344 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 439 transitions, 5341 flow [2024-06-20 16:31:07,344 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) [2024-06-20 16:31:07,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:07,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:31:07,345 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:07,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1186512990, now seen corresponding path program 1 times [2024-06-20 16:31:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:07,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901149613] [2024-06-20 16:31:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:08,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:08,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901149613] [2024-06-20 16:31:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901149613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:08,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348363473] [2024-06-20 16:31:08,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:08,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:31:08,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 439 transitions, 5341 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) [2024-06-20 16:31:08,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:08,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:31:08,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:09,103 INFO L124 PetriNetUnfolderBase]: 2177/3580 cut-off events. [2024-06-20 16:31:09,103 INFO L125 PetriNetUnfolderBase]: For 427150/427150 co-relation queries the response was YES. [2024-06-20 16:31:09,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34730 conditions, 3580 events. 2177/3580 cut-off events. For 427150/427150 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21268 event pairs, 350 based on Foata normal form. 4/3583 useless extension candidates. Maximal degree in co-relation 34588. Up to 3143 conditions per place. [2024-06-20 16:31:09,153 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 408 selfloop transitions, 15 changer transitions 0/463 dead transitions. [2024-06-20 16:31:09,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 463 transitions, 6290 flow [2024-06-20 16:31:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:31:09,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-20 16:31:09,155 INFO L175 Difference]: Start difference. First operand has 293 places, 439 transitions, 5341 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:31:09,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 463 transitions, 6290 flow [2024-06-20 16:31:10,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 463 transitions, 5755 flow, removed 109 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:10,229 INFO L231 Difference]: Finished difference. Result has 294 places, 441 transitions, 4891 flow [2024-06-20 16:31:10,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4891, PETRI_PLACES=294, PETRI_TRANSITIONS=441} [2024-06-20 16:31:10,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-20 16:31:10,230 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 441 transitions, 4891 flow [2024-06-20 16:31:10,230 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) [2024-06-20 16:31:10,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:10,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:31:10,230 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:10,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 672851774, now seen corresponding path program 2 times [2024-06-20 16:31:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:10,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565756891] [2024-06-20 16:31:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:11,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565756891] [2024-06-20 16:31:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565756891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:11,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:11,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676610098] [2024-06-20 16:31:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:11,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:11,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:31:11,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 441 transitions, 4891 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) [2024-06-20 16:31:11,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:11,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:31:11,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:11,915 INFO L124 PetriNetUnfolderBase]: 2191/3602 cut-off events. [2024-06-20 16:31:11,915 INFO L125 PetriNetUnfolderBase]: For 434194/434194 co-relation queries the response was YES. [2024-06-20 16:31:11,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34519 conditions, 3602 events. 2191/3602 cut-off events. For 434194/434194 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21348 event pairs, 381 based on Foata normal form. 4/3605 useless extension candidates. Maximal degree in co-relation 34376. Up to 3174 conditions per place. [2024-06-20 16:31:11,967 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 403 selfloop transitions, 18 changer transitions 0/461 dead transitions. [2024-06-20 16:31:11,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 461 transitions, 5830 flow [2024-06-20 16:31:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:31:11,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:31:11,969 INFO L175 Difference]: Start difference. First operand has 294 places, 441 transitions, 4891 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:31:11,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 461 transitions, 5830 flow [2024-06-20 16:31:13,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 461 transitions, 5755 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:13,259 INFO L231 Difference]: Finished difference. Result has 296 places, 443 transitions, 4912 flow [2024-06-20 16:31:13,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=296, PETRI_TRANSITIONS=443} [2024-06-20 16:31:13,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-20 16:31:13,260 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 443 transitions, 4912 flow [2024-06-20 16:31:13,260 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) [2024-06-20 16:31:13,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:13,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:13,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:31:13,260 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:13,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1819486096, now seen corresponding path program 1 times [2024-06-20 16:31:13,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:13,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391370737] [2024-06-20 16:31:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:13,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:14,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391370737] [2024-06-20 16:31:14,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391370737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:14,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:14,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677238549] [2024-06-20 16:31:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:14,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 443 transitions, 4912 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) [2024-06-20 16:31:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:15,264 INFO L124 PetriNetUnfolderBase]: 2329/3744 cut-off events. [2024-06-20 16:31:15,264 INFO L125 PetriNetUnfolderBase]: For 432113/432113 co-relation queries the response was YES. [2024-06-20 16:31:15,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35498 conditions, 3744 events. 2329/3744 cut-off events. For 432113/432113 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21531 event pairs, 402 based on Foata normal form. 1/3744 useless extension candidates. Maximal degree in co-relation 35354. Up to 3491 conditions per place. [2024-06-20 16:31:15,315 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 439 selfloop transitions, 20 changer transitions 0/464 dead transitions. [2024-06-20 16:31:15,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 464 transitions, 5983 flow [2024-06-20 16:31:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:31:15,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:31:15,317 INFO L175 Difference]: Start difference. First operand has 296 places, 443 transitions, 4912 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:31:15,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 464 transitions, 5983 flow [2024-06-20 16:31:16,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 464 transitions, 5905 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:16,660 INFO L231 Difference]: Finished difference. Result has 299 places, 446 transitions, 4992 flow [2024-06-20 16:31:16,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4992, PETRI_PLACES=299, PETRI_TRANSITIONS=446} [2024-06-20 16:31:16,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 16:31:16,661 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 446 transitions, 4992 flow [2024-06-20 16:31:16,661 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) [2024-06-20 16:31:16,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:16,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:16,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:31:16,662 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:16,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1704199886, now seen corresponding path program 3 times [2024-06-20 16:31:16,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:16,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746942377] [2024-06-20 16:31:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:17,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:17,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746942377] [2024-06-20 16:31:17,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746942377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:17,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:17,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:17,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449604384] [2024-06-20 16:31:17,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:17,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:17,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:17,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:31:17,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 446 transitions, 4992 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) [2024-06-20 16:31:17,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:17,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:31:17,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:18,447 INFO L124 PetriNetUnfolderBase]: 2210/3633 cut-off events. [2024-06-20 16:31:18,448 INFO L125 PetriNetUnfolderBase]: For 454933/454933 co-relation queries the response was YES. [2024-06-20 16:31:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35201 conditions, 3633 events. 2210/3633 cut-off events. For 454933/454933 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21593 event pairs, 380 based on Foata normal form. 4/3636 useless extension candidates. Maximal degree in co-relation 35056. Up to 3205 conditions per place. [2024-06-20 16:31:18,499 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 403 selfloop transitions, 20 changer transitions 0/463 dead transitions. [2024-06-20 16:31:18,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 463 transitions, 5933 flow [2024-06-20 16:31:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:31:18,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 16:31:18,501 INFO L175 Difference]: Start difference. First operand has 299 places, 446 transitions, 4992 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:31:18,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 463 transitions, 5933 flow [2024-06-20 16:31:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 463 transitions, 5755 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-20 16:31:19,992 INFO L231 Difference]: Finished difference. Result has 299 places, 448 transitions, 4920 flow [2024-06-20 16:31:19,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4920, PETRI_PLACES=299, PETRI_TRANSITIONS=448} [2024-06-20 16:31:19,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 16:31:19,993 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 448 transitions, 4920 flow [2024-06-20 16:31:19,993 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) [2024-06-20 16:31:19,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:19,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:31:19,994 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:19,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1704015436, now seen corresponding path program 2 times [2024-06-20 16:31:19,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:19,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322364770] [2024-06-20 16:31:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:19,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:21,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322364770] [2024-06-20 16:31:21,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322364770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:21,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:21,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308823843] [2024-06-20 16:31:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:21,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:21,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:21,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:21,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 448 transitions, 4920 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) [2024-06-20 16:31:21,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:21,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:21,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:22,106 INFO L124 PetriNetUnfolderBase]: 2350/3785 cut-off events. [2024-06-20 16:31:22,106 INFO L125 PetriNetUnfolderBase]: For 452656/452656 co-relation queries the response was YES. [2024-06-20 16:31:22,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36168 conditions, 3785 events. 2350/3785 cut-off events. For 452656/452656 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21945 event pairs, 402 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 36023. Up to 3517 conditions per place. [2024-06-20 16:31:22,155 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 436 selfloop transitions, 25 changer transitions 0/466 dead transitions. [2024-06-20 16:31:22,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 466 transitions, 5995 flow [2024-06-20 16:31:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:31:22,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:31:22,156 INFO L175 Difference]: Start difference. First operand has 299 places, 448 transitions, 4920 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:31:22,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 466 transitions, 5995 flow [2024-06-20 16:31:23,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 466 transitions, 5890 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:23,504 INFO L231 Difference]: Finished difference. Result has 302 places, 451 transitions, 4991 flow [2024-06-20 16:31:23,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4991, PETRI_PLACES=302, PETRI_TRANSITIONS=451} [2024-06-20 16:31:23,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-20 16:31:23,505 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 451 transitions, 4991 flow [2024-06-20 16:31:23,505 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) [2024-06-20 16:31:23,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:23,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:23,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:31:23,505 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:23,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1704015188, now seen corresponding path program 1 times [2024-06-20 16:31:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002034510] [2024-06-20 16:31:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:24,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:24,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002034510] [2024-06-20 16:31:24,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002034510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:24,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:24,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:24,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539788600] [2024-06-20 16:31:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:24,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:24,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:24,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 451 transitions, 4991 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) [2024-06-20 16:31:24,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:24,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:25,399 INFO L124 PetriNetUnfolderBase]: 2358/3793 cut-off events. [2024-06-20 16:31:25,399 INFO L125 PetriNetUnfolderBase]: For 466805/466805 co-relation queries the response was YES. [2024-06-20 16:31:25,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36467 conditions, 3793 events. 2358/3793 cut-off events. For 466805/466805 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 21933 event pairs, 402 based on Foata normal form. 2/3794 useless extension candidates. Maximal degree in co-relation 36322. Up to 3537 conditions per place. [2024-06-20 16:31:25,446 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 447 selfloop transitions, 19 changer transitions 0/471 dead transitions. [2024-06-20 16:31:25,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 471 transitions, 6041 flow [2024-06-20 16:31:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:31:25,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 16:31:25,447 INFO L175 Difference]: Start difference. First operand has 302 places, 451 transitions, 4991 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:31:25,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 471 transitions, 6041 flow [2024-06-20 16:31:26,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 471 transitions, 5883 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:26,841 INFO L231 Difference]: Finished difference. Result has 305 places, 455 transitions, 4965 flow [2024-06-20 16:31:26,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4965, PETRI_PLACES=305, PETRI_TRANSITIONS=455} [2024-06-20 16:31:26,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-20 16:31:26,842 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 455 transitions, 4965 flow [2024-06-20 16:31:26,842 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) [2024-06-20 16:31:26,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:26,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:26,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:31:26,842 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:26,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash 392299754, now seen corresponding path program 4 times [2024-06-20 16:31:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:26,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49564684] [2024-06-20 16:31:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:27,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:27,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49564684] [2024-06-20 16:31:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49564684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:27,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:27,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793702898] [2024-06-20 16:31:27,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:27,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:27,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:27,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:31:27,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 455 transitions, 4965 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) [2024-06-20 16:31:27,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:27,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:31:27,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:28,693 INFO L124 PetriNetUnfolderBase]: 2213/3641 cut-off events. [2024-06-20 16:31:28,694 INFO L125 PetriNetUnfolderBase]: For 469833/469835 co-relation queries the response was YES. [2024-06-20 16:31:28,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35345 conditions, 3641 events. 2213/3641 cut-off events. For 469833/469835 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 21653 event pairs, 382 based on Foata normal form. 6/3646 useless extension candidates. Maximal degree in co-relation 35198. Up to 3193 conditions per place. [2024-06-20 16:31:28,746 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 391 selfloop transitions, 38 changer transitions 0/469 dead transitions. [2024-06-20 16:31:28,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 469 transitions, 5918 flow [2024-06-20 16:31:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:31:28,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 16:31:28,747 INFO L175 Difference]: Start difference. First operand has 305 places, 455 transitions, 4965 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:31:28,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 469 transitions, 5918 flow [2024-06-20 16:31:30,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 469 transitions, 5835 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:30,353 INFO L231 Difference]: Finished difference. Result has 308 places, 457 transitions, 5033 flow [2024-06-20 16:31:30,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4882, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5033, PETRI_PLACES=308, PETRI_TRANSITIONS=457} [2024-06-20 16:31:30,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-20 16:31:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 457 transitions, 5033 flow [2024-06-20 16:31:30,373 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) [2024-06-20 16:31:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:30,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:31:30,373 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:30,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 398740314, now seen corresponding path program 3 times [2024-06-20 16:31:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:30,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337163913] [2024-06-20 16:31:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337163913] [2024-06-20 16:31:31,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337163913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:31,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:31,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:31,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158448774] [2024-06-20 16:31:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:31,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:31,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:31,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:31,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 457 transitions, 5033 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) [2024-06-20 16:31:31,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:31,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:31,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:32,577 INFO L124 PetriNetUnfolderBase]: 2353/3792 cut-off events. [2024-06-20 16:31:32,577 INFO L125 PetriNetUnfolderBase]: For 465655/465655 co-relation queries the response was YES. [2024-06-20 16:31:32,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36383 conditions, 3792 events. 2353/3792 cut-off events. For 465655/465655 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 21999 event pairs, 408 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 36235. Up to 3481 conditions per place. [2024-06-20 16:31:32,628 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 415 selfloop transitions, 52 changer transitions 0/472 dead transitions. [2024-06-20 16:31:32,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 472 transitions, 6122 flow [2024-06-20 16:31:32,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:31:32,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:31:32,631 INFO L175 Difference]: Start difference. First operand has 308 places, 457 transitions, 5033 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:31:32,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 472 transitions, 6122 flow [2024-06-20 16:31:34,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 472 transitions, 5994 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:34,060 INFO L231 Difference]: Finished difference. Result has 311 places, 460 transitions, 5145 flow [2024-06-20 16:31:34,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5145, PETRI_PLACES=311, PETRI_TRANSITIONS=460} [2024-06-20 16:31:34,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-20 16:31:34,061 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 460 transitions, 5145 flow [2024-06-20 16:31:34,061 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) [2024-06-20 16:31:34,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:34,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:34,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:31:34,061 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:34,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash 628659812, now seen corresponding path program 2 times [2024-06-20 16:31:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:34,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931994168] [2024-06-20 16:31:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:34,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931994168] [2024-06-20 16:31:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931994168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:35,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444631945] [2024-06-20 16:31:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:35,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:35,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:35,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 460 transitions, 5145 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) [2024-06-20 16:31:35,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:35,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:35,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:36,080 INFO L124 PetriNetUnfolderBase]: 2397/3861 cut-off events. [2024-06-20 16:31:36,080 INFO L125 PetriNetUnfolderBase]: For 513985/513987 co-relation queries the response was YES. [2024-06-20 16:31:36,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37310 conditions, 3861 events. 2397/3861 cut-off events. For 513985/513987 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 22402 event pairs, 410 based on Foata normal form. 12/3872 useless extension candidates. Maximal degree in co-relation 37162. Up to 3498 conditions per place. [2024-06-20 16:31:36,137 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 415 selfloop transitions, 62 changer transitions 0/482 dead transitions. [2024-06-20 16:31:36,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 482 transitions, 6480 flow [2024-06-20 16:31:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:31:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:31:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:31:36,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 16:31:36,139 INFO L175 Difference]: Start difference. First operand has 311 places, 460 transitions, 5145 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:31:36,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 482 transitions, 6480 flow [2024-06-20 16:31:37,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 482 transitions, 6262 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:37,845 INFO L231 Difference]: Finished difference. Result has 314 places, 463 transitions, 5136 flow [2024-06-20 16:31:37,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5136, PETRI_PLACES=314, PETRI_TRANSITIONS=463} [2024-06-20 16:31:37,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-20 16:31:37,846 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 463 transitions, 5136 flow [2024-06-20 16:31:37,846 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) [2024-06-20 16:31:37,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:37,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:37,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:31:37,846 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:37,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:37,847 INFO L85 PathProgramCache]: Analyzing trace with hash 398970954, now seen corresponding path program 4 times [2024-06-20 16:31:37,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:37,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513116318] [2024-06-20 16:31:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:37,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:38,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513116318] [2024-06-20 16:31:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513116318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:38,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:38,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:38,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613731087] [2024-06-20 16:31:38,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:39,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:39,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 463 transitions, 5136 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) [2024-06-20 16:31:39,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:39,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:39,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:39,887 INFO L124 PetriNetUnfolderBase]: 2402/3867 cut-off events. [2024-06-20 16:31:39,887 INFO L125 PetriNetUnfolderBase]: For 497138/497138 co-relation queries the response was YES. [2024-06-20 16:31:39,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37634 conditions, 3867 events. 2402/3867 cut-off events. For 497138/497138 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22517 event pairs, 414 based on Foata normal form. 1/3866 useless extension candidates. Maximal degree in co-relation 37485. Up to 3524 conditions per place. [2024-06-20 16:31:39,945 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 399 selfloop transitions, 78 changer transitions 0/482 dead transitions. [2024-06-20 16:31:39,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 482 transitions, 6569 flow [2024-06-20 16:31:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:31:39,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:31:39,946 INFO L175 Difference]: Start difference. First operand has 314 places, 463 transitions, 5136 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:31:39,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 482 transitions, 6569 flow [2024-06-20 16:31:41,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 482 transitions, 6426 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:31:41,556 INFO L231 Difference]: Finished difference. Result has 315 places, 469 transitions, 5425 flow [2024-06-20 16:31:41,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=315, PETRI_TRANSITIONS=469} [2024-06-20 16:31:41,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-20 16:31:41,556 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 469 transitions, 5425 flow [2024-06-20 16:31:41,556 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) [2024-06-20 16:31:41,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:41,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:41,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:31:41,557 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:41,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1252123018, now seen corresponding path program 3 times [2024-06-20 16:31:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922112305] [2024-06-20 16:31:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:42,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:42,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922112305] [2024-06-20 16:31:42,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922112305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:42,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:42,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:42,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903719620] [2024-06-20 16:31:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:42,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:42,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:42,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 469 transitions, 5425 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) [2024-06-20 16:31:42,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:42,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:42,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:43,563 INFO L124 PetriNetUnfolderBase]: 2472/3980 cut-off events. [2024-06-20 16:31:43,563 INFO L125 PetriNetUnfolderBase]: For 550089/550091 co-relation queries the response was YES. [2024-06-20 16:31:43,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39700 conditions, 3980 events. 2472/3980 cut-off events. For 550089/550091 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23304 event pairs, 424 based on Foata normal form. 4/3983 useless extension candidates. Maximal degree in co-relation 39550. Up to 3506 conditions per place. [2024-06-20 16:31:43,621 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 421 selfloop transitions, 70 changer transitions 0/496 dead transitions. [2024-06-20 16:31:43,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 496 transitions, 7070 flow [2024-06-20 16:31:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:31:43,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:31:43,622 INFO L175 Difference]: Start difference. First operand has 315 places, 469 transitions, 5425 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:31:43,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 496 transitions, 7070 flow [2024-06-20 16:31:45,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 496 transitions, 6844 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:45,151 INFO L231 Difference]: Finished difference. Result has 319 places, 475 transitions, 5530 flow [2024-06-20 16:31:45,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5530, PETRI_PLACES=319, PETRI_TRANSITIONS=475} [2024-06-20 16:31:45,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 16:31:45,152 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 475 transitions, 5530 flow [2024-06-20 16:31:45,152 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) [2024-06-20 16:31:45,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:45,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:31:45,152 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:45,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash 392484452, now seen corresponding path program 4 times [2024-06-20 16:31:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:45,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345033085] [2024-06-20 16:31:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345033085] [2024-06-20 16:31:45,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345033085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:45,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475007431] [2024-06-20 16:31:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:46,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:46,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 475 transitions, 5530 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) [2024-06-20 16:31:46,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:46,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:46,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:46,968 INFO L124 PetriNetUnfolderBase]: 2467/3971 cut-off events. [2024-06-20 16:31:46,968 INFO L125 PetriNetUnfolderBase]: For 551945/551947 co-relation queries the response was YES. [2024-06-20 16:31:47,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39711 conditions, 3971 events. 2467/3971 cut-off events. For 551945/551947 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23242 event pairs, 425 based on Foata normal form. 4/3974 useless extension candidates. Maximal degree in co-relation 39559. Up to 3689 conditions per place. [2024-06-20 16:31:47,027 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 453 selfloop transitions, 31 changer transitions 0/489 dead transitions. [2024-06-20 16:31:47,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 489 transitions, 6578 flow [2024-06-20 16:31:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:31:47,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 16:31:47,028 INFO L175 Difference]: Start difference. First operand has 319 places, 475 transitions, 5530 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:31:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 489 transitions, 6578 flow [2024-06-20 16:31:48,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 489 transitions, 6436 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:48,877 INFO L231 Difference]: Finished difference. Result has 323 places, 476 transitions, 5504 flow [2024-06-20 16:31:48,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5504, PETRI_PLACES=323, PETRI_TRANSITIONS=476} [2024-06-20 16:31:48,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-20 16:31:48,878 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 476 transitions, 5504 flow [2024-06-20 16:31:48,878 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) [2024-06-20 16:31:48,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:48,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:31:48,878 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:48,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1015650740, now seen corresponding path program 5 times [2024-06-20 16:31:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:48,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725550307] [2024-06-20 16:31:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725550307] [2024-06-20 16:31:50,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725550307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:50,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:50,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333317931] [2024-06-20 16:31:50,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:50,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:50,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:50,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:50,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:50,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 476 transitions, 5504 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) [2024-06-20 16:31:50,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:50,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:50,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:51,110 INFO L124 PetriNetUnfolderBase]: 2469/3974 cut-off events. [2024-06-20 16:31:51,110 INFO L125 PetriNetUnfolderBase]: For 552077/552079 co-relation queries the response was YES. [2024-06-20 16:31:51,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39652 conditions, 3974 events. 2469/3974 cut-off events. For 552077/552079 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23241 event pairs, 425 based on Foata normal form. 3/3976 useless extension candidates. Maximal degree in co-relation 39498. Up to 3669 conditions per place. [2024-06-20 16:31:51,167 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 440 selfloop transitions, 48 changer transitions 0/493 dead transitions. [2024-06-20 16:31:51,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 493 transitions, 6737 flow [2024-06-20 16:31:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:31:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:31:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 16:31:51,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 16:31:51,169 INFO L175 Difference]: Start difference. First operand has 323 places, 476 transitions, 5504 flow. Second operand 10 states and 168 transitions. [2024-06-20 16:31:51,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 493 transitions, 6737 flow [2024-06-20 16:31:52,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 493 transitions, 6616 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:52,871 INFO L231 Difference]: Finished difference. Result has 326 places, 479 transitions, 5519 flow [2024-06-20 16:31:52,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5519, PETRI_PLACES=326, PETRI_TRANSITIONS=479} [2024-06-20 16:31:52,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-20 16:31:52,872 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 479 transitions, 5519 flow [2024-06-20 16:31:52,872 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) [2024-06-20 16:31:52,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:52,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:52,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:31:52,873 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:52,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:52,873 INFO L85 PathProgramCache]: Analyzing trace with hash 392477694, now seen corresponding path program 6 times [2024-06-20 16:31:52,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:52,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727307341] [2024-06-20 16:31:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:52,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:53,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727307341] [2024-06-20 16:31:53,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727307341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:53,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:53,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:53,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998633987] [2024-06-20 16:31:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:53,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:54,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:54,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 479 transitions, 5519 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) [2024-06-20 16:31:54,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:54,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:54,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:54,958 INFO L124 PetriNetUnfolderBase]: 2474/3980 cut-off events. [2024-06-20 16:31:54,959 INFO L125 PetriNetUnfolderBase]: For 561265/561265 co-relation queries the response was YES. [2024-06-20 16:31:54,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39773 conditions, 3980 events. 2474/3980 cut-off events. For 561265/561265 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23265 event pairs, 429 based on Foata normal form. 1/3979 useless extension candidates. Maximal degree in co-relation 39618. Up to 3670 conditions per place. [2024-06-20 16:31:55,016 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 440 selfloop transitions, 49 changer transitions 0/494 dead transitions. [2024-06-20 16:31:55,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 494 transitions, 6611 flow [2024-06-20 16:31:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:31:55,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:31:55,017 INFO L175 Difference]: Start difference. First operand has 326 places, 479 transitions, 5519 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:31:55,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 494 transitions, 6611 flow [2024-06-20 16:31:56,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 494 transitions, 6353 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-20 16:31:56,780 INFO L231 Difference]: Finished difference. Result has 327 places, 482 transitions, 5454 flow [2024-06-20 16:31:56,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5454, PETRI_PLACES=327, PETRI_TRANSITIONS=482} [2024-06-20 16:31:56,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-20 16:31:56,781 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 482 transitions, 5454 flow [2024-06-20 16:31:56,781 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) [2024-06-20 16:31:56,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:56,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:56,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:31:56,781 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:56,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:56,782 INFO L85 PathProgramCache]: Analyzing trace with hash 392304714, now seen corresponding path program 7 times [2024-06-20 16:31:56,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:56,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922444730] [2024-06-20 16:31:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:58,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922444730] [2024-06-20 16:31:58,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922444730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:58,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:58,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:58,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533617113] [2024-06-20 16:31:58,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:58,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:58,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:31:58,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 482 transitions, 5454 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) [2024-06-20 16:31:58,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:58,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:31:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:59,337 INFO L124 PetriNetUnfolderBase]: 2471/3976 cut-off events. [2024-06-20 16:31:59,337 INFO L125 PetriNetUnfolderBase]: For 565650/565650 co-relation queries the response was YES. [2024-06-20 16:31:59,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39621 conditions, 3976 events. 2471/3976 cut-off events. For 565650/565650 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23257 event pairs, 429 based on Foata normal form. 1/3975 useless extension candidates. Maximal degree in co-relation 39465. Up to 3660 conditions per place. [2024-06-20 16:31:59,393 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 435 selfloop transitions, 58 changer transitions 0/498 dead transitions. [2024-06-20 16:31:59,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 498 transitions, 6510 flow [2024-06-20 16:31:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:31:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:31:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-20 16:31:59,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-20 16:31:59,394 INFO L175 Difference]: Start difference. First operand has 327 places, 482 transitions, 5454 flow. Second operand 11 states and 177 transitions. [2024-06-20 16:31:59,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 498 transitions, 6510 flow [2024-06-20 16:32:01,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 498 transitions, 6318 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:01,274 INFO L231 Difference]: Finished difference. Result has 333 places, 486 transitions, 5443 flow [2024-06-20 16:32:01,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5264, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5443, PETRI_PLACES=333, PETRI_TRANSITIONS=486} [2024-06-20 16:32:01,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-20 16:32:01,275 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 486 transitions, 5443 flow [2024-06-20 16:32:01,275 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) [2024-06-20 16:32:01,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:01,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:01,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:32:01,275 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:01,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:01,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1477718082, now seen corresponding path program 1 times [2024-06-20 16:32:01,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:01,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071900269] [2024-06-20 16:32:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:01,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:01,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:01,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071900269] [2024-06-20 16:32:01,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071900269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:01,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:01,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340619590] [2024-06-20 16:32:01,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:01,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:02,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 486 transitions, 5443 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) [2024-06-20 16:32:02,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:02,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:02,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:03,115 INFO L124 PetriNetUnfolderBase]: 2507/4037 cut-off events. [2024-06-20 16:32:03,115 INFO L125 PetriNetUnfolderBase]: For 615585/615587 co-relation queries the response was YES. [2024-06-20 16:32:03,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40350 conditions, 4037 events. 2507/4037 cut-off events. For 615585/615587 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23633 event pairs, 324 based on Foata normal form. 12/4048 useless extension candidates. Maximal degree in co-relation 40191. Up to 3570 conditions per place. [2024-06-20 16:32:03,175 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 488 selfloop transitions, 29 changer transitions 0/522 dead transitions. [2024-06-20 16:32:03,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 522 transitions, 6812 flow [2024-06-20 16:32:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:32:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:32:03,176 INFO L175 Difference]: Start difference. First operand has 333 places, 486 transitions, 5443 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:32:03,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 522 transitions, 6812 flow [2024-06-20 16:32:05,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 522 transitions, 6675 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:32:05,173 INFO L231 Difference]: Finished difference. Result has 334 places, 488 transitions, 5477 flow [2024-06-20 16:32:05,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5306, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5477, PETRI_PLACES=334, PETRI_TRANSITIONS=488} [2024-06-20 16:32:05,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-20 16:32:05,176 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 488 transitions, 5477 flow [2024-06-20 16:32:05,176 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) [2024-06-20 16:32:05,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:05,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:32:05,176 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:05,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 232417672, now seen corresponding path program 2 times [2024-06-20 16:32:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:05,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883729375] [2024-06-20 16:32:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:05,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883729375] [2024-06-20 16:32:05,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883729375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:05,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:05,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033722059] [2024-06-20 16:32:05,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:05,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:05,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:06,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:06,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 488 transitions, 5477 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) [2024-06-20 16:32:06,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:06,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:06,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:07,059 INFO L124 PetriNetUnfolderBase]: 2623/4215 cut-off events. [2024-06-20 16:32:07,059 INFO L125 PetriNetUnfolderBase]: For 704531/704533 co-relation queries the response was YES. [2024-06-20 16:32:07,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43858 conditions, 4215 events. 2623/4215 cut-off events. For 704531/704533 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24776 event pairs, 461 based on Foata normal form. 14/4228 useless extension candidates. Maximal degree in co-relation 43698. Up to 3680 conditions per place. [2024-06-20 16:32:07,125 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 482 selfloop transitions, 38 changer transitions 0/525 dead transitions. [2024-06-20 16:32:07,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 525 transitions, 7224 flow [2024-06-20 16:32:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:32:07,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-20 16:32:07,129 INFO L175 Difference]: Start difference. First operand has 334 places, 488 transitions, 5477 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:32:07,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 525 transitions, 7224 flow [2024-06-20 16:32:09,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 525 transitions, 7093 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:09,523 INFO L231 Difference]: Finished difference. Result has 336 places, 492 transitions, 5647 flow [2024-06-20 16:32:09,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5647, PETRI_PLACES=336, PETRI_TRANSITIONS=492} [2024-06-20 16:32:09,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-20 16:32:09,524 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 492 transitions, 5647 flow [2024-06-20 16:32:09,524 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) [2024-06-20 16:32:09,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:09,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:09,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:32:09,524 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:09,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash 232744102, now seen corresponding path program 3 times [2024-06-20 16:32:09,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:09,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584856861] [2024-06-20 16:32:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:09,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584856861] [2024-06-20 16:32:10,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584856861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:10,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:10,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14634684] [2024-06-20 16:32:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:10,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:10,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 492 transitions, 5647 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) [2024-06-20 16:32:10,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:10,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:10,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:11,325 INFO L124 PetriNetUnfolderBase]: 2595/4173 cut-off events. [2024-06-20 16:32:11,326 INFO L125 PetriNetUnfolderBase]: For 658021/658023 co-relation queries the response was YES. [2024-06-20 16:32:11,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42256 conditions, 4173 events. 2595/4173 cut-off events. For 658021/658023 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24516 event pairs, 473 based on Foata normal form. 14/4186 useless extension candidates. Maximal degree in co-relation 42095. Up to 3778 conditions per place. [2024-06-20 16:32:11,388 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 478 selfloop transitions, 36 changer transitions 0/519 dead transitions. [2024-06-20 16:32:11,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 519 transitions, 6852 flow [2024-06-20 16:32:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:32:11,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-20 16:32:11,390 INFO L175 Difference]: Start difference. First operand has 336 places, 492 transitions, 5647 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:32:11,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 519 transitions, 6852 flow [2024-06-20 16:32:13,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 519 transitions, 6665 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:13,969 INFO L231 Difference]: Finished difference. Result has 340 places, 492 transitions, 5539 flow [2024-06-20 16:32:13,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5539, PETRI_PLACES=340, PETRI_TRANSITIONS=492} [2024-06-20 16:32:13,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-20 16:32:13,969 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 492 transitions, 5539 flow [2024-06-20 16:32:13,970 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) [2024-06-20 16:32:13,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:13,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:13,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:32:13,970 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:13,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1139074170, now seen corresponding path program 1 times [2024-06-20 16:32:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:13,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487485267] [2024-06-20 16:32:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:13,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:14,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:14,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487485267] [2024-06-20 16:32:14,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487485267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:14,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:14,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:32:14,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725213715] [2024-06-20 16:32:14,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:14,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:32:14,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:32:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:32:15,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:15,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 492 transitions, 5539 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) [2024-06-20 16:32:15,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:15,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:15,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:16,114 INFO L124 PetriNetUnfolderBase]: 2651/4261 cut-off events. [2024-06-20 16:32:16,114 INFO L125 PetriNetUnfolderBase]: For 698110/698112 co-relation queries the response was YES. [2024-06-20 16:32:16,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43210 conditions, 4261 events. 2651/4261 cut-off events. For 698110/698112 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25126 event pairs, 481 based on Foata normal form. 18/4278 useless extension candidates. Maximal degree in co-relation 43047. Up to 3852 conditions per place. [2024-06-20 16:32:16,178 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 480 selfloop transitions, 36 changer transitions 0/521 dead transitions. [2024-06-20 16:32:16,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 521 transitions, 6826 flow [2024-06-20 16:32:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:32:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:32:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 16:32:16,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-20 16:32:16,180 INFO L175 Difference]: Start difference. First operand has 340 places, 492 transitions, 5539 flow. Second operand 10 states and 181 transitions. [2024-06-20 16:32:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 521 transitions, 6826 flow [2024-06-20 16:32:17,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 521 transitions, 6747 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:32:17,952 INFO L231 Difference]: Finished difference. Result has 342 places, 494 transitions, 5650 flow [2024-06-20 16:32:17,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5650, PETRI_PLACES=342, PETRI_TRANSITIONS=494} [2024-06-20 16:32:17,952 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-20 16:32:17,953 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 494 transitions, 5650 flow [2024-06-20 16:32:17,953 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) [2024-06-20 16:32:17,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:17,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:32:17,953 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:17,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2110121248, now seen corresponding path program 1 times [2024-06-20 16:32:17,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:17,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645141000] [2024-06-20 16:32:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:18,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:18,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645141000] [2024-06-20 16:32:18,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645141000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:18,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:18,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132453685] [2024-06-20 16:32:18,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:18,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:18,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 494 transitions, 5650 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) [2024-06-20 16:32:18,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:18,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:19,981 INFO L124 PetriNetUnfolderBase]: 2757/4446 cut-off events. [2024-06-20 16:32:19,982 INFO L125 PetriNetUnfolderBase]: For 646592/646594 co-relation queries the response was YES. [2024-06-20 16:32:20,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44806 conditions, 4446 events. 2757/4446 cut-off events. For 646592/646594 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26396 event pairs, 511 based on Foata normal form. 3/4447 useless extension candidates. Maximal degree in co-relation 44642. Up to 3934 conditions per place. [2024-06-20 16:32:20,048 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 56 changer transitions 0/540 dead transitions. [2024-06-20 16:32:20,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 540 transitions, 7178 flow [2024-06-20 16:32:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:32:20,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:32:20,050 INFO L175 Difference]: Start difference. First operand has 342 places, 494 transitions, 5650 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:32:20,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 540 transitions, 7178 flow [2024-06-20 16:32:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 540 transitions, 7024 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 16:32:22,491 INFO L231 Difference]: Finished difference. Result has 345 places, 516 transitions, 6037 flow [2024-06-20 16:32:22,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6037, PETRI_PLACES=345, PETRI_TRANSITIONS=516} [2024-06-20 16:32:22,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-20 16:32:22,492 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 516 transitions, 6037 flow [2024-06-20 16:32:22,492 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) [2024-06-20 16:32:22,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:22,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:22,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:32:22,492 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:22,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -660320394, now seen corresponding path program 2 times [2024-06-20 16:32:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:22,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978190889] [2024-06-20 16:32:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:22,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978190889] [2024-06-20 16:32:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978190889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:23,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:23,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252973253] [2024-06-20 16:32:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:23,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:23,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:23,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 516 transitions, 6037 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) [2024-06-20 16:32:23,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:23,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:23,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:24,440 INFO L124 PetriNetUnfolderBase]: 2773/4475 cut-off events. [2024-06-20 16:32:24,440 INFO L125 PetriNetUnfolderBase]: For 651468/651470 co-relation queries the response was YES. [2024-06-20 16:32:24,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45180 conditions, 4475 events. 2773/4475 cut-off events. For 651468/651470 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26655 event pairs, 503 based on Foata normal form. 1/4474 useless extension candidates. Maximal degree in co-relation 45013. Up to 3951 conditions per place. [2024-06-20 16:32:24,511 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 481 selfloop transitions, 57 changer transitions 0/543 dead transitions. [2024-06-20 16:32:24,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 543 transitions, 7319 flow [2024-06-20 16:32:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:32:24,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-20 16:32:24,513 INFO L175 Difference]: Start difference. First operand has 345 places, 516 transitions, 6037 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:32:24,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 543 transitions, 7319 flow [2024-06-20 16:32:27,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 543 transitions, 7167 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:27,360 INFO L231 Difference]: Finished difference. Result has 350 places, 522 transitions, 6164 flow [2024-06-20 16:32:27,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6164, PETRI_PLACES=350, PETRI_TRANSITIONS=522} [2024-06-20 16:32:27,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-20 16:32:27,361 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 522 transitions, 6164 flow [2024-06-20 16:32:27,361 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) [2024-06-20 16:32:27,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:27,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:32:27,362 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:27,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2077436458, now seen corresponding path program 1 times [2024-06-20 16:32:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:27,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877794775] [2024-06-20 16:32:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877794775] [2024-06-20 16:32:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877794775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:28,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:28,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:28,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349728745] [2024-06-20 16:32:28,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:28,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:28,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 522 transitions, 6164 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) [2024-06-20 16:32:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:28,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:29,304 INFO L124 PetriNetUnfolderBase]: 2783/4482 cut-off events. [2024-06-20 16:32:29,305 INFO L125 PetriNetUnfolderBase]: For 673326/673328 co-relation queries the response was YES. [2024-06-20 16:32:29,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45884 conditions, 4482 events. 2783/4482 cut-off events. For 673326/673328 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26657 event pairs, 501 based on Foata normal form. 2/4482 useless extension candidates. Maximal degree in co-relation 45716. Up to 3954 conditions per place. [2024-06-20 16:32:29,382 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 480 selfloop transitions, 63 changer transitions 0/548 dead transitions. [2024-06-20 16:32:29,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 548 transitions, 7482 flow [2024-06-20 16:32:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:32:29,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-20 16:32:29,384 INFO L175 Difference]: Start difference. First operand has 350 places, 522 transitions, 6164 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:32:29,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 548 transitions, 7482 flow [2024-06-20 16:32:31,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 548 transitions, 7271 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:31,293 INFO L231 Difference]: Finished difference. Result has 354 places, 526 transitions, 6270 flow [2024-06-20 16:32:31,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5953, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6270, PETRI_PLACES=354, PETRI_TRANSITIONS=526} [2024-06-20 16:32:31,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-20 16:32:31,293 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 526 transitions, 6270 flow [2024-06-20 16:32:31,294 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) [2024-06-20 16:32:31,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:31,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:32:31,294 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:31,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2061006162, now seen corresponding path program 3 times [2024-06-20 16:32:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999547466] [2024-06-20 16:32:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:32,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:32,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999547466] [2024-06-20 16:32:32,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999547466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:32,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:32,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:32,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706913397] [2024-06-20 16:32:32,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:32,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:32,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:32,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:32,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 526 transitions, 6270 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) [2024-06-20 16:32:32,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:32,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:32,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:33,249 INFO L124 PetriNetUnfolderBase]: 2796/4507 cut-off events. [2024-06-20 16:32:33,249 INFO L125 PetriNetUnfolderBase]: For 692334/692336 co-relation queries the response was YES. [2024-06-20 16:32:33,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46779 conditions, 4507 events. 2796/4507 cut-off events. For 692334/692336 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26835 event pairs, 501 based on Foata normal form. 1/4506 useless extension candidates. Maximal degree in co-relation 46610. Up to 3958 conditions per place. [2024-06-20 16:32:33,320 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 476 selfloop transitions, 70 changer transitions 0/551 dead transitions. [2024-06-20 16:32:33,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 551 transitions, 7866 flow [2024-06-20 16:32:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:32:33,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:32:33,321 INFO L175 Difference]: Start difference. First operand has 354 places, 526 transitions, 6270 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:32:33,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 551 transitions, 7866 flow [2024-06-20 16:32:35,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 551 transitions, 7577 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:35,603 INFO L231 Difference]: Finished difference. Result has 355 places, 532 transitions, 6382 flow [2024-06-20 16:32:35,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6382, PETRI_PLACES=355, PETRI_TRANSITIONS=532} [2024-06-20 16:32:35,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-20 16:32:35,603 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 532 transitions, 6382 flow [2024-06-20 16:32:35,604 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) [2024-06-20 16:32:35,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:35,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:35,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:32:35,604 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:35,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2100735099, now seen corresponding path program 1 times [2024-06-20 16:32:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:35,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616926577] [2024-06-20 16:32:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:36,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616926577] [2024-06-20 16:32:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616926577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:36,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174330174] [2024-06-20 16:32:36,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:36,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:36,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 532 transitions, 6382 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) [2024-06-20 16:32:36,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:36,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:36,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:37,723 INFO L124 PetriNetUnfolderBase]: 2806/4522 cut-off events. [2024-06-20 16:32:37,723 INFO L125 PetriNetUnfolderBase]: For 708043/708047 co-relation queries the response was YES. [2024-06-20 16:32:37,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47146 conditions, 4522 events. 2806/4522 cut-off events. For 708043/708047 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 26918 event pairs, 485 based on Foata normal form. 4/4525 useless extension candidates. Maximal degree in co-relation 46976. Up to 4093 conditions per place. [2024-06-20 16:32:37,794 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 512 selfloop transitions, 41 changer transitions 0/558 dead transitions. [2024-06-20 16:32:37,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 558 transitions, 7646 flow [2024-06-20 16:32:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:32:37,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:32:37,805 INFO L175 Difference]: Start difference. First operand has 355 places, 532 transitions, 6382 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:32:37,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 558 transitions, 7646 flow [2024-06-20 16:32:39,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 558 transitions, 7438 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:39,748 INFO L231 Difference]: Finished difference. Result has 362 places, 539 transitions, 6398 flow [2024-06-20 16:32:39,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6174, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6398, PETRI_PLACES=362, PETRI_TRANSITIONS=539} [2024-06-20 16:32:39,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-20 16:32:39,749 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 539 transitions, 6398 flow [2024-06-20 16:32:39,749 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) [2024-06-20 16:32:39,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:39,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:39,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:32:39,750 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:39,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash -897273625, now seen corresponding path program 2 times [2024-06-20 16:32:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:39,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039104869] [2024-06-20 16:32:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:40,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:40,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039104869] [2024-06-20 16:32:40,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039104869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:40,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:40,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052347310] [2024-06-20 16:32:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:40,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:40,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:40,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 539 transitions, 6398 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) [2024-06-20 16:32:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:40,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:42,014 INFO L124 PetriNetUnfolderBase]: 2826/4554 cut-off events. [2024-06-20 16:32:42,015 INFO L125 PetriNetUnfolderBase]: For 731923/731927 co-relation queries the response was YES. [2024-06-20 16:32:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47775 conditions, 4554 events. 2826/4554 cut-off events. For 731923/731927 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 27123 event pairs, 493 based on Foata normal form. 6/4559 useless extension candidates. Maximal degree in co-relation 47601. Up to 3954 conditions per place. [2024-06-20 16:32:42,085 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 463 selfloop transitions, 96 changer transitions 0/564 dead transitions. [2024-06-20 16:32:42,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 564 transitions, 7858 flow [2024-06-20 16:32:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:32:42,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:32:42,086 INFO L175 Difference]: Start difference. First operand has 362 places, 539 transitions, 6398 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:32:42,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 564 transitions, 7858 flow [2024-06-20 16:32:44,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 564 transitions, 7724 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:44,798 INFO L231 Difference]: Finished difference. Result has 366 places, 547 transitions, 6775 flow [2024-06-20 16:32:44,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6775, PETRI_PLACES=366, PETRI_TRANSITIONS=547} [2024-06-20 16:32:44,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-20 16:32:44,799 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 547 transitions, 6775 flow [2024-06-20 16:32:44,799 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) [2024-06-20 16:32:44,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:44,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:44,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:32:44,800 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:44,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 547431759, now seen corresponding path program 3 times [2024-06-20 16:32:44,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:44,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215654045] [2024-06-20 16:32:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:44,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:45,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215654045] [2024-06-20 16:32:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215654045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:45,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877149623] [2024-06-20 16:32:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:45,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:45,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:45,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:45,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:45,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 547 transitions, 6775 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) [2024-06-20 16:32:45,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:45,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:45,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:46,973 INFO L124 PetriNetUnfolderBase]: 2852/4590 cut-off events. [2024-06-20 16:32:46,973 INFO L125 PetriNetUnfolderBase]: For 755713/755717 co-relation queries the response was YES. [2024-06-20 16:32:47,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49269 conditions, 4590 events. 2852/4590 cut-off events. For 755713/755717 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27320 event pairs, 493 based on Foata normal form. 4/4593 useless extension candidates. Maximal degree in co-relation 49094. Up to 3902 conditions per place. [2024-06-20 16:32:47,040 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 445 selfloop transitions, 122 changer transitions 0/572 dead transitions. [2024-06-20 16:32:47,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 572 transitions, 8472 flow [2024-06-20 16:32:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:32:47,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:32:47,041 INFO L175 Difference]: Start difference. First operand has 366 places, 547 transitions, 6775 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:32:47,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 572 transitions, 8472 flow [2024-06-20 16:32:49,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 572 transitions, 8034 flow, removed 128 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:49,492 INFO L231 Difference]: Finished difference. Result has 369 places, 554 transitions, 6903 flow [2024-06-20 16:32:49,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6903, PETRI_PLACES=369, PETRI_TRANSITIONS=554} [2024-06-20 16:32:49,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 16:32:49,493 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 554 transitions, 6903 flow [2024-06-20 16:32:49,493 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) [2024-06-20 16:32:49,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:49,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:49,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:32:49,493 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:49,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 539813199, now seen corresponding path program 4 times [2024-06-20 16:32:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86479262] [2024-06-20 16:32:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:50,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86479262] [2024-06-20 16:32:50,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86479262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:50,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321300066] [2024-06-20 16:32:50,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:50,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:50,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:50,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:50,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 554 transitions, 6903 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) [2024-06-20 16:32:50,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:50,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:50,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:51,576 INFO L124 PetriNetUnfolderBase]: 2854/4599 cut-off events. [2024-06-20 16:32:51,576 INFO L125 PetriNetUnfolderBase]: For 766066/766070 co-relation queries the response was YES. [2024-06-20 16:32:51,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49559 conditions, 4599 events. 2854/4599 cut-off events. For 766066/766070 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27468 event pairs, 493 based on Foata normal form. 4/4602 useless extension candidates. Maximal degree in co-relation 49382. Up to 4078 conditions per place. [2024-06-20 16:32:51,649 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 506 selfloop transitions, 67 changer transitions 0/578 dead transitions. [2024-06-20 16:32:51,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 578 transitions, 8225 flow [2024-06-20 16:32:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:32:51,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:32:51,651 INFO L175 Difference]: Start difference. First operand has 369 places, 554 transitions, 6903 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:32:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 578 transitions, 8225 flow [2024-06-20 16:32:54,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 578 transitions, 7920 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:54,422 INFO L231 Difference]: Finished difference. Result has 373 places, 561 transitions, 6891 flow [2024-06-20 16:32:54,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6891, PETRI_PLACES=373, PETRI_TRANSITIONS=561} [2024-06-20 16:32:54,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 16:32:54,422 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 561 transitions, 6891 flow [2024-06-20 16:32:54,423 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) [2024-06-20 16:32:54,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:54,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:54,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:32:54,423 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:54,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 547041500, now seen corresponding path program 4 times [2024-06-20 16:32:54,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:54,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986053990] [2024-06-20 16:32:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:54,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:55,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986053990] [2024-06-20 16:32:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986053990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657909950] [2024-06-20 16:32:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:55,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:55,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:55,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 561 transitions, 6891 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) [2024-06-20 16:32:55,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:55,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:55,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:56,507 INFO L124 PetriNetUnfolderBase]: 2898/4667 cut-off events. [2024-06-20 16:32:56,507 INFO L125 PetriNetUnfolderBase]: For 838858/838862 co-relation queries the response was YES. [2024-06-20 16:32:56,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50337 conditions, 4667 events. 2898/4667 cut-off events. For 838858/838862 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27867 event pairs, 499 based on Foata normal form. 14/4680 useless extension candidates. Maximal degree in co-relation 50158. Up to 4025 conditions per place. [2024-06-20 16:32:56,589 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 485 selfloop transitions, 94 changer transitions 0/584 dead transitions. [2024-06-20 16:32:56,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 584 transitions, 8347 flow [2024-06-20 16:32:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:32:56,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-20 16:32:56,591 INFO L175 Difference]: Start difference. First operand has 373 places, 561 transitions, 6891 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:32:56,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 584 transitions, 8347 flow [2024-06-20 16:32:59,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 584 transitions, 8181 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:59,835 INFO L231 Difference]: Finished difference. Result has 378 places, 563 transitions, 7040 flow [2024-06-20 16:32:59,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7040, PETRI_PLACES=378, PETRI_TRANSITIONS=563} [2024-06-20 16:32:59,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-20 16:32:59,835 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 563 transitions, 7040 flow [2024-06-20 16:32:59,836 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) [2024-06-20 16:32:59,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:59,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:59,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:32:59,836 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:59,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash 536316740, now seen corresponding path program 5 times [2024-06-20 16:32:59,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:59,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119451848] [2024-06-20 16:32:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:00,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119451848] [2024-06-20 16:33:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119451848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:00,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:00,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736563273] [2024-06-20 16:33:00,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:00,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:00,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:00,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 563 transitions, 7040 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) [2024-06-20 16:33:00,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:00,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:00,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:01,905 INFO L124 PetriNetUnfolderBase]: 2942/4739 cut-off events. [2024-06-20 16:33:01,906 INFO L125 PetriNetUnfolderBase]: For 860673/860677 co-relation queries the response was YES. [2024-06-20 16:33:01,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51523 conditions, 4739 events. 2942/4739 cut-off events. For 860673/860677 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28430 event pairs, 507 based on Foata normal form. 14/4752 useless extension candidates. Maximal degree in co-relation 51343. Up to 4093 conditions per place. [2024-06-20 16:33:01,983 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 490 selfloop transitions, 93 changer transitions 0/588 dead transitions. [2024-06-20 16:33:01,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 588 transitions, 8532 flow [2024-06-20 16:33:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:33:01,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-20 16:33:01,984 INFO L175 Difference]: Start difference. First operand has 378 places, 563 transitions, 7040 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:33:01,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 588 transitions, 8532 flow [2024-06-20 16:33:05,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 588 transitions, 8271 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:05,215 INFO L231 Difference]: Finished difference. Result has 380 places, 565 transitions, 7096 flow [2024-06-20 16:33:05,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7096, PETRI_PLACES=380, PETRI_TRANSITIONS=565} [2024-06-20 16:33:05,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-20 16:33:05,215 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 565 transitions, 7096 flow [2024-06-20 16:33:05,216 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) [2024-06-20 16:33:05,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:05,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:33:05,216 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:05,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:05,216 INFO L85 PathProgramCache]: Analyzing trace with hash -908448164, now seen corresponding path program 6 times [2024-06-20 16:33:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577205405] [2024-06-20 16:33:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:05,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577205405] [2024-06-20 16:33:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577205405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:05,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:05,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684053741] [2024-06-20 16:33:05,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:05,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:06,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 565 transitions, 7096 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) [2024-06-20 16:33:06,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:06,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:07,314 INFO L124 PetriNetUnfolderBase]: 2986/4803 cut-off events. [2024-06-20 16:33:07,314 INFO L125 PetriNetUnfolderBase]: For 881368/881372 co-relation queries the response was YES. [2024-06-20 16:33:07,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52399 conditions, 4803 events. 2986/4803 cut-off events. For 881368/881372 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 28841 event pairs, 503 based on Foata normal form. 14/4816 useless extension candidates. Maximal degree in co-relation 52218. Up to 4001 conditions per place. [2024-06-20 16:33:07,398 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 493 selfloop transitions, 97 changer transitions 0/595 dead transitions. [2024-06-20 16:33:07,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 595 transitions, 8748 flow [2024-06-20 16:33:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:33:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 16:33:07,399 INFO L175 Difference]: Start difference. First operand has 380 places, 565 transitions, 7096 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:33:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 595 transitions, 8748 flow [2024-06-20 16:33:10,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 595 transitions, 8485 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:10,301 INFO L231 Difference]: Finished difference. Result has 382 places, 567 transitions, 7160 flow [2024-06-20 16:33:10,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6833, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7160, PETRI_PLACES=382, PETRI_TRANSITIONS=567} [2024-06-20 16:33:10,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-20 16:33:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 567 transitions, 7160 flow [2024-06-20 16:33:10,302 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) [2024-06-20 16:33:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:10,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:33:10,303 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:10,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash -908109830, now seen corresponding path program 2 times [2024-06-20 16:33:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:10,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891435399] [2024-06-20 16:33:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891435399] [2024-06-20 16:33:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891435399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:11,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:33:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332954693] [2024-06-20 16:33:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:11,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:33:11,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:33:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:33:11,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:11,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 567 transitions, 7160 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) [2024-06-20 16:33:11,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:11,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:11,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:12,788 INFO L124 PetriNetUnfolderBase]: 3255/5250 cut-off events. [2024-06-20 16:33:12,788 INFO L125 PetriNetUnfolderBase]: For 1202057/1202059 co-relation queries the response was YES. [2024-06-20 16:33:12,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59339 conditions, 5250 events. 3255/5250 cut-off events. For 1202057/1202059 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 31947 event pairs, 644 based on Foata normal form. 52/5298 useless extension candidates. Maximal degree in co-relation 59157. Up to 4047 conditions per place. [2024-06-20 16:33:12,871 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 449 selfloop transitions, 150 changer transitions 9/613 dead transitions. [2024-06-20 16:33:12,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 613 transitions, 9950 flow [2024-06-20 16:33:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:33:12,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775 [2024-06-20 16:33:12,872 INFO L175 Difference]: Start difference. First operand has 382 places, 567 transitions, 7160 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:33:12,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 613 transitions, 9950 flow [2024-06-20 16:33:16,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 613 transitions, 9671 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:16,120 INFO L231 Difference]: Finished difference. Result has 389 places, 578 transitions, 8248 flow [2024-06-20 16:33:16,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6883, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8248, PETRI_PLACES=389, PETRI_TRANSITIONS=578} [2024-06-20 16:33:16,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-20 16:33:16,121 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 578 transitions, 8248 flow [2024-06-20 16:33:16,121 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) [2024-06-20 16:33:16,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:16,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:33:16,122 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:16,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1870356706, now seen corresponding path program 3 times [2024-06-20 16:33:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:16,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13144857] [2024-06-20 16:33:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:17,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:17,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13144857] [2024-06-20 16:33:17,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13144857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:17,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:17,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:33:17,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874371768] [2024-06-20 16:33:17,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:17,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:33:17,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:17,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:33:17,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:33:17,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:17,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 578 transitions, 8248 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) [2024-06-20 16:33:17,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:17,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:17,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:18,694 INFO L124 PetriNetUnfolderBase]: 3404/5500 cut-off events. [2024-06-20 16:33:18,695 INFO L125 PetriNetUnfolderBase]: For 1177613/1177617 co-relation queries the response was YES. [2024-06-20 16:33:18,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66934 conditions, 5500 events. 3404/5500 cut-off events. For 1177613/1177617 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33859 event pairs, 655 based on Foata normal form. 14/5513 useless extension candidates. Maximal degree in co-relation 66747. Up to 4486 conditions per place. [2024-06-20 16:33:18,787 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 516 selfloop transitions, 92 changer transitions 0/613 dead transitions. [2024-06-20 16:33:18,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 613 transitions, 10615 flow [2024-06-20 16:33:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 16:33:18,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-20 16:33:18,789 INFO L175 Difference]: Start difference. First operand has 389 places, 578 transitions, 8248 flow. Second operand 10 states and 182 transitions. [2024-06-20 16:33:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 613 transitions, 10615 flow [2024-06-20 16:33:23,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 613 transitions, 10007 flow, removed 276 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:23,012 INFO L231 Difference]: Finished difference. Result has 396 places, 583 transitions, 8185 flow [2024-06-20 16:33:23,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8185, PETRI_PLACES=396, PETRI_TRANSITIONS=583} [2024-06-20 16:33:23,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-20 16:33:23,012 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 583 transitions, 8185 flow [2024-06-20 16:33:23,012 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) [2024-06-20 16:33:23,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:23,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:33:23,013 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:23,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash -897010280, now seen corresponding path program 4 times [2024-06-20 16:33:23,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:23,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591982019] [2024-06-20 16:33:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:23,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:23,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591982019] [2024-06-20 16:33:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591982019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:23,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:33:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011083017] [2024-06-20 16:33:23,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:23,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:33:23,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:33:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:33:24,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:24,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 583 transitions, 8185 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) [2024-06-20 16:33:24,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:24,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:25,712 INFO L124 PetriNetUnfolderBase]: 3592/5818 cut-off events. [2024-06-20 16:33:25,713 INFO L125 PetriNetUnfolderBase]: For 1396276/1396280 co-relation queries the response was YES. [2024-06-20 16:33:25,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68281 conditions, 5818 events. 3592/5818 cut-off events. For 1396276/1396280 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36289 event pairs, 736 based on Foata normal form. 57/5872 useless extension candidates. Maximal degree in co-relation 68092. Up to 4727 conditions per place. [2024-06-20 16:33:25,812 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 472 selfloop transitions, 130 changer transitions 9/616 dead transitions. [2024-06-20 16:33:25,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 616 transitions, 10204 flow [2024-06-20 16:33:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:33:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:33:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-20 16:33:25,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-20 16:33:25,814 INFO L175 Difference]: Start difference. First operand has 396 places, 583 transitions, 8185 flow. Second operand 11 states and 203 transitions. [2024-06-20 16:33:25,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 616 transitions, 10204 flow [2024-06-20 16:33:30,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 616 transitions, 9976 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:30,578 INFO L231 Difference]: Finished difference. Result has 403 places, 581 transitions, 8536 flow [2024-06-20 16:33:30,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8536, PETRI_PLACES=403, PETRI_TRANSITIONS=581} [2024-06-20 16:33:30,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-20 16:33:30,579 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 581 transitions, 8536 flow [2024-06-20 16:33:30,579 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) [2024-06-20 16:33:30,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:30,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:33:30,579 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:30,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -92365062, now seen corresponding path program 4 times [2024-06-20 16:33:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293882529] [2024-06-20 16:33:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293882529] [2024-06-20 16:33:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293882529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:31,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:31,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492104915] [2024-06-20 16:33:31,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:31,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:31,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:31,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:31,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:31,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 581 transitions, 8536 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) [2024-06-20 16:33:31,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:31,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:31,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:32,937 INFO L124 PetriNetUnfolderBase]: 3541/5749 cut-off events. [2024-06-20 16:33:32,937 INFO L125 PetriNetUnfolderBase]: For 1078726/1078730 co-relation queries the response was YES. [2024-06-20 16:33:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67617 conditions, 5749 events. 3541/5749 cut-off events. For 1078726/1078730 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35810 event pairs, 736 based on Foata normal form. 6/5753 useless extension candidates. Maximal degree in co-relation 67424. Up to 5171 conditions per place. [2024-06-20 16:33:33,037 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 523 selfloop transitions, 76 changer transitions 0/604 dead transitions. [2024-06-20 16:33:33,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 604 transitions, 9922 flow [2024-06-20 16:33:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 16:33:33,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-20 16:33:33,038 INFO L175 Difference]: Start difference. First operand has 403 places, 581 transitions, 8536 flow. Second operand 7 states and 138 transitions. [2024-06-20 16:33:33,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 604 transitions, 9922 flow [2024-06-20 16:33:37,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 604 transitions, 9404 flow, removed 139 selfloop flow, removed 10 redundant places. [2024-06-20 16:33:37,799 INFO L231 Difference]: Finished difference. Result has 400 places, 584 transitions, 8333 flow [2024-06-20 16:33:37,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8333, PETRI_PLACES=400, PETRI_TRANSITIONS=584} [2024-06-20 16:33:37,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-20 16:33:37,800 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 584 transitions, 8333 flow [2024-06-20 16:33:37,800 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) [2024-06-20 16:33:37,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:37,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:37,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:33:37,800 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:37,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2055509084, now seen corresponding path program 2 times [2024-06-20 16:33:37,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:37,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596279162] [2024-06-20 16:33:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596279162] [2024-06-20 16:33:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596279162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:38,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:38,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:38,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931350262] [2024-06-20 16:33:38,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:38,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:38,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:38,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:38,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 584 transitions, 8333 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) [2024-06-20 16:33:38,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:38,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:38,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:40,341 INFO L124 PetriNetUnfolderBase]: 3546/5744 cut-off events. [2024-06-20 16:33:40,341 INFO L125 PetriNetUnfolderBase]: For 1061039/1061041 co-relation queries the response was YES. [2024-06-20 16:33:40,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66314 conditions, 5744 events. 3546/5744 cut-off events. For 1061039/1061041 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35769 event pairs, 752 based on Foata normal form. 3/5743 useless extension candidates. Maximal degree in co-relation 66122. Up to 5199 conditions per place. [2024-06-20 16:33:40,443 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 537 selfloop transitions, 66 changer transitions 0/608 dead transitions. [2024-06-20 16:33:40,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 608 transitions, 9746 flow [2024-06-20 16:33:40,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:33:40,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:33:40,445 INFO L175 Difference]: Start difference. First operand has 400 places, 584 transitions, 8333 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:33:40,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 608 transitions, 9746 flow [2024-06-20 16:33:44,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 608 transitions, 9525 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:44,355 INFO L231 Difference]: Finished difference. Result has 405 places, 587 transitions, 8402 flow [2024-06-20 16:33:44,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8114, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8402, PETRI_PLACES=405, PETRI_TRANSITIONS=587} [2024-06-20 16:33:44,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-20 16:33:44,356 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 587 transitions, 8402 flow [2024-06-20 16:33:44,356 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) [2024-06-20 16:33:44,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:44,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:44,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:33:44,357 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:44,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:44,357 INFO L85 PathProgramCache]: Analyzing trace with hash 373763404, now seen corresponding path program 5 times [2024-06-20 16:33:44,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:44,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304934527] [2024-06-20 16:33:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:44,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:45,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304934527] [2024-06-20 16:33:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304934527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:45,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283612031] [2024-06-20 16:33:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:45,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:45,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:45,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 587 transitions, 8402 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) [2024-06-20 16:33:45,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:45,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:45,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:46,611 INFO L124 PetriNetUnfolderBase]: 3504/5676 cut-off events. [2024-06-20 16:33:46,611 INFO L125 PetriNetUnfolderBase]: For 1061688/1061690 co-relation queries the response was YES. [2024-06-20 16:33:46,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65380 conditions, 5676 events. 3504/5676 cut-off events. For 1061688/1061690 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35318 event pairs, 728 based on Foata normal form. 1/5675 useless extension candidates. Maximal degree in co-relation 65187. Up to 5015 conditions per place. [2024-06-20 16:33:46,712 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 487 selfloop transitions, 103 changer transitions 9/604 dead transitions. [2024-06-20 16:33:46,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 604 transitions, 9746 flow [2024-06-20 16:33:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:33:46,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:33:46,714 INFO L175 Difference]: Start difference. First operand has 405 places, 587 transitions, 8402 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:33:46,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 604 transitions, 9746 flow [2024-06-20 16:33:51,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 604 transitions, 9525 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:51,639 INFO L231 Difference]: Finished difference. Result has 405 places, 580 transitions, 8347 flow [2024-06-20 16:33:51,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8347, PETRI_PLACES=405, PETRI_TRANSITIONS=580} [2024-06-20 16:33:51,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-20 16:33:51,640 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 580 transitions, 8347 flow [2024-06-20 16:33:51,640 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) [2024-06-20 16:33:51,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:51,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:51,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:33:51,641 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:51,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 797299984, now seen corresponding path program 3 times [2024-06-20 16:33:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:51,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053427988] [2024-06-20 16:33:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:51,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:52,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:52,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053427988] [2024-06-20 16:33:52,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053427988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:52,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:52,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:52,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674142788] [2024-06-20 16:33:52,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:52,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:52,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:52,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 580 transitions, 8347 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) [2024-06-20 16:33:52,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:52,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:52,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:54,118 INFO L124 PetriNetUnfolderBase]: 3393/5495 cut-off events. [2024-06-20 16:33:54,119 INFO L125 PetriNetUnfolderBase]: For 1067560/1067562 co-relation queries the response was YES. [2024-06-20 16:33:54,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 5495 events. 3393/5495 cut-off events. For 1067560/1067562 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34000 event pairs, 668 based on Foata normal form. 1/5495 useless extension candidates. Maximal degree in co-relation 63738. Up to 5154 conditions per place. [2024-06-20 16:33:54,212 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 574 selfloop transitions, 21 changer transitions 0/600 dead transitions. [2024-06-20 16:33:54,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 600 transitions, 9743 flow [2024-06-20 16:33:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:33:54,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:33:54,213 INFO L175 Difference]: Start difference. First operand has 405 places, 580 transitions, 8347 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:33:54,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 600 transitions, 9743 flow [2024-06-20 16:33:58,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 600 transitions, 9463 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-20 16:33:58,552 INFO L231 Difference]: Finished difference. Result has 405 places, 583 transitions, 8285 flow [2024-06-20 16:33:58,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8285, PETRI_PLACES=405, PETRI_TRANSITIONS=583} [2024-06-20 16:33:58,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-20 16:33:58,553 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 583 transitions, 8285 flow [2024-06-20 16:33:58,553 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) [2024-06-20 16:33:58,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:58,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:33:58,554 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:58,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:58,554 INFO L85 PathProgramCache]: Analyzing trace with hash -569923408, now seen corresponding path program 6 times [2024-06-20 16:33:58,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:58,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523167005] [2024-06-20 16:33:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:58,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:59,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:59,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523167005] [2024-06-20 16:33:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523167005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:59,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045992752] [2024-06-20 16:33:59,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:59,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:59,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:59,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:59,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:59,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:33:59,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 583 transitions, 8285 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) [2024-06-20 16:33:59,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:59,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:33:59,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:00,755 INFO L124 PetriNetUnfolderBase]: 3390/5495 cut-off events. [2024-06-20 16:34:00,755 INFO L125 PetriNetUnfolderBase]: For 1048415/1048417 co-relation queries the response was YES. [2024-06-20 16:34:00,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63417 conditions, 5495 events. 3390/5495 cut-off events. For 1048415/1048417 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33987 event pairs, 731 based on Foata normal form. 1/5494 useless extension candidates. Maximal degree in co-relation 63224. Up to 4756 conditions per place. [2024-06-20 16:34:00,853 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 132 changer transitions 0/596 dead transitions. [2024-06-20 16:34:00,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 596 transitions, 9644 flow [2024-06-20 16:34:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:34:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:34:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:34:00,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:34:00,854 INFO L175 Difference]: Start difference. First operand has 405 places, 583 transitions, 8285 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:34:00,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 596 transitions, 9644 flow [2024-06-20 16:34:04,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 596 transitions, 9448 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:04,941 INFO L231 Difference]: Finished difference. Result has 405 places, 586 transitions, 8523 flow [2024-06-20 16:34:04,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8089, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8523, PETRI_PLACES=405, PETRI_TRANSITIONS=586} [2024-06-20 16:34:04,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-20 16:34:04,941 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 586 transitions, 8523 flow [2024-06-20 16:34:04,942 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) [2024-06-20 16:34:04,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:04,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:04,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:34:04,942 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:04,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash 796884274, now seen corresponding path program 4 times [2024-06-20 16:34:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507851982] [2024-06-20 16:34:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:05,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507851982] [2024-06-20 16:34:05,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507851982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:05,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:05,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746082801] [2024-06-20 16:34:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:05,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:05,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 586 transitions, 8523 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) [2024-06-20 16:34:05,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:05,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:05,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:07,258 INFO L124 PetriNetUnfolderBase]: 3387/5476 cut-off events. [2024-06-20 16:34:07,259 INFO L125 PetriNetUnfolderBase]: For 1062461/1062463 co-relation queries the response was YES. [2024-06-20 16:34:07,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63952 conditions, 5476 events. 3387/5476 cut-off events. For 1062461/1062463 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33787 event pairs, 677 based on Foata normal form. 3/5475 useless extension candidates. Maximal degree in co-relation 63758. Up to 4893 conditions per place. [2024-06-20 16:34:07,353 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 515 selfloop transitions, 90 changer transitions 0/610 dead transitions. [2024-06-20 16:34:07,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 610 transitions, 10304 flow [2024-06-20 16:34:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 16:34:07,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2024-06-20 16:34:07,354 INFO L175 Difference]: Start difference. First operand has 405 places, 586 transitions, 8523 flow. Second operand 10 states and 177 transitions. [2024-06-20 16:34:07,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 610 transitions, 10304 flow [2024-06-20 16:34:11,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 610 transitions, 9926 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:11,232 INFO L231 Difference]: Finished difference. Result has 411 places, 591 transitions, 8644 flow [2024-06-20 16:34:11,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8145, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8644, PETRI_PLACES=411, PETRI_TRANSITIONS=591} [2024-06-20 16:34:11,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-20 16:34:11,233 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 591 transitions, 8644 flow [2024-06-20 16:34:11,233 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) [2024-06-20 16:34:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:11,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:34:11,234 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:11,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1669257812, now seen corresponding path program 5 times [2024-06-20 16:34:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509426537] [2024-06-20 16:34:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:11,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509426537] [2024-06-20 16:34:11,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509426537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:11,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:11,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374837872] [2024-06-20 16:34:11,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:11,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:12,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:12,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 591 transitions, 8644 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) [2024-06-20 16:34:12,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:12,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:12,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:13,501 INFO L124 PetriNetUnfolderBase]: 3384/5472 cut-off events. [2024-06-20 16:34:13,501 INFO L125 PetriNetUnfolderBase]: For 1074737/1074739 co-relation queries the response was YES. [2024-06-20 16:34:13,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64037 conditions, 5472 events. 3384/5472 cut-off events. For 1074737/1074739 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33741 event pairs, 681 based on Foata normal form. 1/5469 useless extension candidates. Maximal degree in co-relation 63841. Up to 4927 conditions per place. [2024-06-20 16:34:13,598 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 543 selfloop transitions, 63 changer transitions 0/611 dead transitions. [2024-06-20 16:34:13,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 611 transitions, 9906 flow [2024-06-20 16:34:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:34:13,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:34:13,599 INFO L175 Difference]: Start difference. First operand has 411 places, 591 transitions, 8644 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:34:13,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 611 transitions, 9906 flow [2024-06-20 16:34:18,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 611 transitions, 9432 flow, removed 135 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:18,125 INFO L231 Difference]: Finished difference. Result has 412 places, 591 transitions, 8302 flow [2024-06-20 16:34:18,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8302, PETRI_PLACES=412, PETRI_TRANSITIONS=591} [2024-06-20 16:34:18,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-20 16:34:18,126 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 591 transitions, 8302 flow [2024-06-20 16:34:18,126 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) [2024-06-20 16:34:18,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:18,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:34:18,126 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:18,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1619075233, now seen corresponding path program 5 times [2024-06-20 16:34:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:18,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168626889] [2024-06-20 16:34:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:18,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:18,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:18,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168626889] [2024-06-20 16:34:18,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168626889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:18,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:18,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:18,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962566485] [2024-06-20 16:34:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:18,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:18,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:18,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 591 transitions, 8302 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) [2024-06-20 16:34:18,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:18,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:20,355 INFO L124 PetriNetUnfolderBase]: 3369/5453 cut-off events. [2024-06-20 16:34:20,356 INFO L125 PetriNetUnfolderBase]: For 1075565/1075567 co-relation queries the response was YES. [2024-06-20 16:34:20,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63307 conditions, 5453 events. 3369/5453 cut-off events. For 1075565/1075567 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33620 event pairs, 659 based on Foata normal form. 1/5452 useless extension candidates. Maximal degree in co-relation 63111. Up to 5012 conditions per place. [2024-06-20 16:34:20,448 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 567 selfloop transitions, 38 changer transitions 1/611 dead transitions. [2024-06-20 16:34:20,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 611 transitions, 9592 flow [2024-06-20 16:34:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:34:20,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:34:20,449 INFO L175 Difference]: Start difference. First operand has 412 places, 591 transitions, 8302 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:34:20,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 611 transitions, 9592 flow [2024-06-20 16:34:24,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 611 transitions, 9377 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:24,960 INFO L231 Difference]: Finished difference. Result has 414 places, 593 transitions, 8201 flow [2024-06-20 16:34:24,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8087, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8201, PETRI_PLACES=414, PETRI_TRANSITIONS=593} [2024-06-20 16:34:24,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-20 16:34:24,961 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 593 transitions, 8201 flow [2024-06-20 16:34:24,961 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) [2024-06-20 16:34:24,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:24,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:24,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:34:24,961 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:24,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1284877435, now seen corresponding path program 6 times [2024-06-20 16:34:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:24,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303714073] [2024-06-20 16:34:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303714073] [2024-06-20 16:34:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303714073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:25,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589078503] [2024-06-20 16:34:25,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:25,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:25,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 593 transitions, 8201 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) [2024-06-20 16:34:25,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:25,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:25,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:27,345 INFO L124 PetriNetUnfolderBase]: 3381/5470 cut-off events. [2024-06-20 16:34:27,346 INFO L125 PetriNetUnfolderBase]: For 1096414/1096416 co-relation queries the response was YES. [2024-06-20 16:34:27,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63605 conditions, 5470 events. 3381/5470 cut-off events. For 1096414/1096416 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33741 event pairs, 664 based on Foata normal form. 1/5470 useless extension candidates. Maximal degree in co-relation 63407. Up to 5131 conditions per place. [2024-06-20 16:34:27,443 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 584 selfloop transitions, 27 changer transitions 0/616 dead transitions. [2024-06-20 16:34:27,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 616 transitions, 9879 flow [2024-06-20 16:34:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 16:34:27,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-20 16:34:27,444 INFO L175 Difference]: Start difference. First operand has 414 places, 593 transitions, 8201 flow. Second operand 10 states and 164 transitions. [2024-06-20 16:34:27,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 616 transitions, 9879 flow [2024-06-20 16:34:32,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 616 transitions, 9768 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:32,020 INFO L231 Difference]: Finished difference. Result has 420 places, 600 transitions, 8348 flow [2024-06-20 16:34:32,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8348, PETRI_PLACES=420, PETRI_TRANSITIONS=600} [2024-06-20 16:34:32,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-20 16:34:32,021 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 600 transitions, 8348 flow [2024-06-20 16:34:32,021 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) [2024-06-20 16:34:32,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:32,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:34:32,022 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:32,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1332106503, now seen corresponding path program 7 times [2024-06-20 16:34:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491947053] [2024-06-20 16:34:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491947053] [2024-06-20 16:34:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491947053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301683495] [2024-06-20 16:34:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:32,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:32,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 600 transitions, 8348 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) [2024-06-20 16:34:32,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:32,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:32,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:34,386 INFO L124 PetriNetUnfolderBase]: 3383/5459 cut-off events. [2024-06-20 16:34:34,387 INFO L125 PetriNetUnfolderBase]: For 1110844/1110846 co-relation queries the response was YES. [2024-06-20 16:34:34,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63571 conditions, 5459 events. 3383/5459 cut-off events. For 1110844/1110846 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33501 event pairs, 664 based on Foata normal form. 2/5460 useless extension candidates. Maximal degree in co-relation 63371. Up to 5125 conditions per place. [2024-06-20 16:34:34,482 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 582 selfloop transitions, 30 changer transitions 0/617 dead transitions. [2024-06-20 16:34:34,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 617 transitions, 9704 flow [2024-06-20 16:34:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:34:34,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-20 16:34:34,483 INFO L175 Difference]: Start difference. First operand has 420 places, 600 transitions, 8348 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:34:34,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 617 transitions, 9704 flow [2024-06-20 16:34:39,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 617 transitions, 9548 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:39,335 INFO L231 Difference]: Finished difference. Result has 423 places, 603 transitions, 8366 flow [2024-06-20 16:34:39,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8366, PETRI_PLACES=423, PETRI_TRANSITIONS=603} [2024-06-20 16:34:39,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-20 16:34:39,336 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 603 transitions, 8366 flow [2024-06-20 16:34:39,336 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) [2024-06-20 16:34:39,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:39,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:39,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:34:39,336 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:39,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1344993513, now seen corresponding path program 8 times [2024-06-20 16:34:39,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:39,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754509923] [2024-06-20 16:34:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:39,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:40,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754509923] [2024-06-20 16:34:40,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754509923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:40,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:40,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199283979] [2024-06-20 16:34:40,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:40,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:40,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:40,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:40,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:40,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:40,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 603 transitions, 8366 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) [2024-06-20 16:34:40,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:40,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:40,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:41,723 INFO L124 PetriNetUnfolderBase]: 3388/5468 cut-off events. [2024-06-20 16:34:41,723 INFO L125 PetriNetUnfolderBase]: For 1118781/1118783 co-relation queries the response was YES. [2024-06-20 16:34:41,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63715 conditions, 5468 events. 3388/5468 cut-off events. For 1118781/1118783 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33571 event pairs, 653 based on Foata normal form. 1/5467 useless extension candidates. Maximal degree in co-relation 63514. Up to 5006 conditions per place. [2024-06-20 16:34:41,816 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 562 selfloop transitions, 57 changer transitions 0/624 dead transitions. [2024-06-20 16:34:41,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 624 transitions, 9747 flow [2024-06-20 16:34:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:34:41,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-20 16:34:41,820 INFO L175 Difference]: Start difference. First operand has 423 places, 603 transitions, 8366 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:34:41,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 624 transitions, 9747 flow [2024-06-20 16:34:46,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 624 transitions, 9613 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:46,317 INFO L231 Difference]: Finished difference. Result has 427 places, 610 transitions, 8487 flow [2024-06-20 16:34:46,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8232, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8487, PETRI_PLACES=427, PETRI_TRANSITIONS=610} [2024-06-20 16:34:46,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 16:34:46,319 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 610 transitions, 8487 flow [2024-06-20 16:34:46,319 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) [2024-06-20 16:34:46,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:46,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:46,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:34:46,321 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:46,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1919988689, now seen corresponding path program 9 times [2024-06-20 16:34:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:46,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340719454] [2024-06-20 16:34:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:47,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340719454] [2024-06-20 16:34:47,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340719454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:47,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:47,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:47,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853886323] [2024-06-20 16:34:47,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:47,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:47,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:47,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:47,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:47,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:47,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 610 transitions, 8487 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) [2024-06-20 16:34:47,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:47,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:47,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:48,740 INFO L124 PetriNetUnfolderBase]: 3398/5489 cut-off events. [2024-06-20 16:34:48,741 INFO L125 PetriNetUnfolderBase]: For 1142183/1142187 co-relation queries the response was YES. [2024-06-20 16:34:48,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64146 conditions, 5489 events. 3398/5489 cut-off events. For 1142183/1142187 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33772 event pairs, 677 based on Foata normal form. 4/5492 useless extension candidates. Maximal degree in co-relation 63942. Up to 4839 conditions per place. [2024-06-20 16:34:48,835 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 519 selfloop transitions, 107 changer transitions 0/631 dead transitions. [2024-06-20 16:34:48,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 631 transitions, 9924 flow [2024-06-20 16:34:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:34:48,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:34:48,836 INFO L175 Difference]: Start difference. First operand has 427 places, 610 transitions, 8487 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:34:48,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 631 transitions, 9924 flow [2024-06-20 16:34:53,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 631 transitions, 9762 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:53,419 INFO L231 Difference]: Finished difference. Result has 432 places, 616 transitions, 8687 flow [2024-06-20 16:34:53,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8325, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8687, PETRI_PLACES=432, PETRI_TRANSITIONS=616} [2024-06-20 16:34:53,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-20 16:34:53,420 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 616 transitions, 8687 flow [2024-06-20 16:34:53,420 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) [2024-06-20 16:34:53,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:53,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:53,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:34:53,421 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:53,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash 218571653, now seen corresponding path program 10 times [2024-06-20 16:34:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:53,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947242546] [2024-06-20 16:34:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:54,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:54,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947242546] [2024-06-20 16:34:54,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947242546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:54,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:54,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:54,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399873634] [2024-06-20 16:34:54,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:54,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:54,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:54,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:34:54,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 616 transitions, 8687 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) [2024-06-20 16:34:54,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:54,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:34:54,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:56,102 INFO L124 PetriNetUnfolderBase]: 3408/5503 cut-off events. [2024-06-20 16:34:56,103 INFO L125 PetriNetUnfolderBase]: For 1157902/1157906 co-relation queries the response was YES. [2024-06-20 16:34:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64597 conditions, 5503 events. 3408/5503 cut-off events. For 1157902/1157906 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33873 event pairs, 679 based on Foata normal form. 4/5506 useless extension candidates. Maximal degree in co-relation 64391. Up to 4802 conditions per place. [2024-06-20 16:34:56,192 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 506 selfloop transitions, 125 changer transitions 0/636 dead transitions. [2024-06-20 16:34:56,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 636 transitions, 10383 flow [2024-06-20 16:34:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:34:56,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:34:56,193 INFO L175 Difference]: Start difference. First operand has 432 places, 616 transitions, 8687 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:34:56,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 636 transitions, 10383 flow [2024-06-20 16:35:00,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 636 transitions, 10092 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:00,240 INFO L231 Difference]: Finished difference. Result has 435 places, 620 transitions, 8775 flow [2024-06-20 16:35:00,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8396, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8775, PETRI_PLACES=435, PETRI_TRANSITIONS=620} [2024-06-20 16:35:00,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 16:35:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 620 transitions, 8775 flow [2024-06-20 16:35:00,241 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) [2024-06-20 16:35:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:35:00,242 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:00,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1843322263, now seen corresponding path program 11 times [2024-06-20 16:35:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434882949] [2024-06-20 16:35:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:01,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434882949] [2024-06-20 16:35:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434882949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:01,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:01,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136651841] [2024-06-20 16:35:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:01,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:01,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 620 transitions, 8775 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) [2024-06-20 16:35:01,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:01,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:01,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:02,752 INFO L124 PetriNetUnfolderBase]: 3410/5512 cut-off events. [2024-06-20 16:35:02,753 INFO L125 PetriNetUnfolderBase]: For 1164543/1164547 co-relation queries the response was YES. [2024-06-20 16:35:02,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64613 conditions, 5512 events. 3410/5512 cut-off events. For 1164543/1164547 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 34024 event pairs, 677 based on Foata normal form. 4/5515 useless extension candidates. Maximal degree in co-relation 64406. Up to 4856 conditions per place. [2024-06-20 16:35:02,853 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 523 selfloop transitions, 113 changer transitions 0/641 dead transitions. [2024-06-20 16:35:02,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 641 transitions, 10238 flow [2024-06-20 16:35:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:35:02,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:35:02,854 INFO L175 Difference]: Start difference. First operand has 435 places, 620 transitions, 8775 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:35:02,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 641 transitions, 10238 flow [2024-06-20 16:35:06,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 641 transitions, 9922 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:06,993 INFO L231 Difference]: Finished difference. Result has 440 places, 628 transitions, 8874 flow [2024-06-20 16:35:06,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8874, PETRI_PLACES=440, PETRI_TRANSITIONS=628} [2024-06-20 16:35:06,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-20 16:35:06,994 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 628 transitions, 8874 flow [2024-06-20 16:35:06,994 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) [2024-06-20 16:35:06,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:06,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:35:06,995 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:06,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2052070319, now seen corresponding path program 12 times [2024-06-20 16:35:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:06,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111720598] [2024-06-20 16:35:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:07,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:07,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111720598] [2024-06-20 16:35:07,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111720598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:07,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:07,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788974048] [2024-06-20 16:35:07,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:07,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:07,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:07,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:08,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:08,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 628 transitions, 8874 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) [2024-06-20 16:35:08,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:09,659 INFO L124 PetriNetUnfolderBase]: 3431/5533 cut-off events. [2024-06-20 16:35:09,660 INFO L125 PetriNetUnfolderBase]: For 1187510/1187514 co-relation queries the response was YES. [2024-06-20 16:35:09,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65269 conditions, 5533 events. 3431/5533 cut-off events. For 1187510/1187514 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34032 event pairs, 666 based on Foata normal form. 3/5535 useless extension candidates. Maximal degree in co-relation 65059. Up to 5153 conditions per place. [2024-06-20 16:35:09,759 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 590 selfloop transitions, 55 changer transitions 0/650 dead transitions. [2024-06-20 16:35:09,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 650 transitions, 10668 flow [2024-06-20 16:35:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-20 16:35:09,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-20 16:35:09,761 INFO L175 Difference]: Start difference. First operand has 440 places, 628 transitions, 8874 flow. Second operand 11 states and 182 transitions. [2024-06-20 16:35:09,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 650 transitions, 10668 flow [2024-06-20 16:35:15,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 650 transitions, 10405 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-20 16:35:15,327 INFO L231 Difference]: Finished difference. Result has 448 places, 636 transitions, 8965 flow [2024-06-20 16:35:15,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8612, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8965, PETRI_PLACES=448, PETRI_TRANSITIONS=636} [2024-06-20 16:35:15,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-20 16:35:15,328 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 636 transitions, 8965 flow [2024-06-20 16:35:15,328 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) [2024-06-20 16:35:15,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:15,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:35:15,328 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2051624849, now seen corresponding path program 13 times [2024-06-20 16:35:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425713300] [2024-06-20 16:35:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:16,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:16,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425713300] [2024-06-20 16:35:16,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425713300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:16,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:16,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:16,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215837069] [2024-06-20 16:35:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:16,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:16,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:16,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:16,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:16,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 636 transitions, 8965 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) [2024-06-20 16:35:16,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:16,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:16,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:18,150 INFO L124 PetriNetUnfolderBase]: 3449/5551 cut-off events. [2024-06-20 16:35:18,150 INFO L125 PetriNetUnfolderBase]: For 1221290/1221292 co-relation queries the response was YES. [2024-06-20 16:35:18,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65746 conditions, 5551 events. 3449/5551 cut-off events. For 1221290/1221292 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 34023 event pairs, 672 based on Foata normal form. 2/5551 useless extension candidates. Maximal degree in co-relation 65534. Up to 5112 conditions per place. [2024-06-20 16:35:18,250 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 568 selfloop transitions, 86 changer transitions 0/659 dead transitions. [2024-06-20 16:35:18,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 659 transitions, 10938 flow [2024-06-20 16:35:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-20 16:35:18,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-20 16:35:18,251 INFO L175 Difference]: Start difference. First operand has 448 places, 636 transitions, 8965 flow. Second operand 11 states and 188 transitions. [2024-06-20 16:35:18,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 659 transitions, 10938 flow [2024-06-20 16:35:23,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 659 transitions, 10750 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:23,572 INFO L231 Difference]: Finished difference. Result has 453 places, 645 transitions, 9380 flow [2024-06-20 16:35:23,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8788, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9380, PETRI_PLACES=453, PETRI_TRANSITIONS=645} [2024-06-20 16:35:23,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-20 16:35:23,573 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 645 transitions, 9380 flow [2024-06-20 16:35:23,573 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) [2024-06-20 16:35:23,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:23,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:23,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:35:23,573 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:23,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash -304750325, now seen corresponding path program 14 times [2024-06-20 16:35:23,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:23,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613454430] [2024-06-20 16:35:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:23,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613454430] [2024-06-20 16:35:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613454430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453926425] [2024-06-20 16:35:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:24,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:24,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 645 transitions, 9380 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) [2024-06-20 16:35:24,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:24,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:24,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:26,103 INFO L124 PetriNetUnfolderBase]: 3443/5554 cut-off events. [2024-06-20 16:35:26,104 INFO L125 PetriNetUnfolderBase]: For 1230553/1230557 co-relation queries the response was YES. [2024-06-20 16:35:26,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65991 conditions, 5554 events. 3443/5554 cut-off events. For 1230553/1230557 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34173 event pairs, 666 based on Foata normal form. 4/5557 useless extension candidates. Maximal degree in co-relation 65778. Up to 5180 conditions per place. [2024-06-20 16:35:26,204 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 604 selfloop transitions, 47 changer transitions 0/656 dead transitions. [2024-06-20 16:35:26,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 656 transitions, 10708 flow [2024-06-20 16:35:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:35:26,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-20 16:35:26,205 INFO L175 Difference]: Start difference. First operand has 453 places, 645 transitions, 9380 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:35:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 656 transitions, 10708 flow [2024-06-20 16:35:32,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 656 transitions, 10332 flow, removed 121 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:32,756 INFO L231 Difference]: Finished difference. Result has 454 places, 645 transitions, 9105 flow [2024-06-20 16:35:32,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9105, PETRI_PLACES=454, PETRI_TRANSITIONS=645} [2024-06-20 16:35:32,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-20 16:35:32,757 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 645 transitions, 9105 flow [2024-06-20 16:35:32,757 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) [2024-06-20 16:35:32,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:32,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:32,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:35:32,757 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:32,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1356623705, now seen corresponding path program 15 times [2024-06-20 16:35:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:32,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091035674] [2024-06-20 16:35:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:33,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:33,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091035674] [2024-06-20 16:35:33,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091035674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:33,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:33,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:33,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348154647] [2024-06-20 16:35:33,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:33,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:33,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:33,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:33,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:33,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 645 transitions, 9105 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) [2024-06-20 16:35:33,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:33,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:35,672 INFO L124 PetriNetUnfolderBase]: 3449/5553 cut-off events. [2024-06-20 16:35:35,673 INFO L125 PetriNetUnfolderBase]: For 1253711/1253715 co-relation queries the response was YES. [2024-06-20 16:35:35,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65581 conditions, 5553 events. 3449/5553 cut-off events. For 1253711/1253715 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34049 event pairs, 668 based on Foata normal form. 8/5560 useless extension candidates. Maximal degree in co-relation 65367. Up to 4996 conditions per place. [2024-06-20 16:35:35,762 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 524 selfloop transitions, 137 changer transitions 0/666 dead transitions. [2024-06-20 16:35:35,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 666 transitions, 10952 flow [2024-06-20 16:35:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-20 16:35:35,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-20 16:35:35,764 INFO L175 Difference]: Start difference. First operand has 454 places, 645 transitions, 9105 flow. Second operand 11 states and 191 transitions. [2024-06-20 16:35:35,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 666 transitions, 10952 flow [2024-06-20 16:35:42,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 666 transitions, 10874 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:35:42,161 INFO L231 Difference]: Finished difference. Result has 460 places, 652 transitions, 9556 flow [2024-06-20 16:35:42,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9556, PETRI_PLACES=460, PETRI_TRANSITIONS=652} [2024-06-20 16:35:42,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-20 16:35:42,177 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 652 transitions, 9556 flow [2024-06-20 16:35:42,177 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) [2024-06-20 16:35:42,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:42,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:35:42,177 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:42,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1131074849, now seen corresponding path program 16 times [2024-06-20 16:35:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48812230] [2024-06-20 16:35:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:43,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:43,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48812230] [2024-06-20 16:35:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48812230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:43,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:43,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:43,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750852214] [2024-06-20 16:35:43,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:43,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:43,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 652 transitions, 9556 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) [2024-06-20 16:35:43,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:43,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:43,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:44,823 INFO L124 PetriNetUnfolderBase]: 3454/5566 cut-off events. [2024-06-20 16:35:44,824 INFO L125 PetriNetUnfolderBase]: For 1226757/1226761 co-relation queries the response was YES. [2024-06-20 16:35:44,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66106 conditions, 5566 events. 3454/5566 cut-off events. For 1226757/1226761 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34238 event pairs, 668 based on Foata normal form. 3/5568 useless extension candidates. Maximal degree in co-relation 65891. Up to 5102 conditions per place. [2024-06-20 16:35:44,921 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 577 selfloop transitions, 93 changer transitions 0/675 dead transitions. [2024-06-20 16:35:44,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 675 transitions, 11516 flow [2024-06-20 16:35:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:35:44,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:35:44,922 INFO L175 Difference]: Start difference. First operand has 460 places, 652 transitions, 9556 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:35:44,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 675 transitions, 11516 flow [2024-06-20 16:35:52,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 675 transitions, 11023 flow, removed 141 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:52,213 INFO L231 Difference]: Finished difference. Result has 463 places, 661 transitions, 9616 flow [2024-06-20 16:35:52,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9152, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9616, PETRI_PLACES=463, PETRI_TRANSITIONS=661} [2024-06-20 16:35:52,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-20 16:35:52,214 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 661 transitions, 9616 flow [2024-06-20 16:35:52,214 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) [2024-06-20 16:35:52,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:52,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:35:52,215 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:52,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1419949927, now seen corresponding path program 17 times [2024-06-20 16:35:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:52,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492657382] [2024-06-20 16:35:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492657382] [2024-06-20 16:35:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492657382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:53,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:53,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625755221] [2024-06-20 16:35:53,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:53,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:53,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:35:53,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 661 transitions, 9616 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) [2024-06-20 16:35:53,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:53,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:35:53,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:54,801 INFO L124 PetriNetUnfolderBase]: 3454/5561 cut-off events. [2024-06-20 16:35:54,802 INFO L125 PetriNetUnfolderBase]: For 1224859/1224863 co-relation queries the response was YES. [2024-06-20 16:35:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65710 conditions, 5561 events. 3454/5561 cut-off events. For 1224859/1224863 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 34140 event pairs, 668 based on Foata normal form. 4/5564 useless extension candidates. Maximal degree in co-relation 65493. Up to 5196 conditions per place. [2024-06-20 16:35:54,905 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 620 selfloop transitions, 50 changer transitions 0/675 dead transitions. [2024-06-20 16:35:54,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 675 transitions, 11104 flow [2024-06-20 16:35:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:35:54,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:35:54,906 INFO L175 Difference]: Start difference. First operand has 463 places, 661 transitions, 9616 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:35:54,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 675 transitions, 11104 flow [2024-06-20 16:36:01,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 675 transitions, 10910 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-20 16:36:01,245 INFO L231 Difference]: Finished difference. Result has 467 places, 664 transitions, 9660 flow [2024-06-20 16:36:01,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9422, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9660, PETRI_PLACES=467, PETRI_TRANSITIONS=664} [2024-06-20 16:36:01,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-20 16:36:01,246 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 664 transitions, 9660 flow [2024-06-20 16:36:01,246 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) [2024-06-20 16:36:01,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:01,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:01,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:36:01,247 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:01,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash -717898035, now seen corresponding path program 18 times [2024-06-20 16:36:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:01,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849542356] [2024-06-20 16:36:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:02,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:02,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849542356] [2024-06-20 16:36:02,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849542356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:02,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:02,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097667515] [2024-06-20 16:36:02,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:02,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:36:02,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 664 transitions, 9660 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) [2024-06-20 16:36:02,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:02,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:36:02,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:03,765 INFO L124 PetriNetUnfolderBase]: 3449/5561 cut-off events. [2024-06-20 16:36:03,765 INFO L125 PetriNetUnfolderBase]: For 1220484/1220488 co-relation queries the response was YES. [2024-06-20 16:36:03,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65578 conditions, 5561 events. 3449/5561 cut-off events. For 1220484/1220488 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34217 event pairs, 666 based on Foata normal form. 3/5563 useless extension candidates. Maximal degree in co-relation 65359. Up to 5213 conditions per place. [2024-06-20 16:36:03,874 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 633 selfloop transitions, 39 changer transitions 0/677 dead transitions. [2024-06-20 16:36:03,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 677 transitions, 11084 flow [2024-06-20 16:36:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 16:36:03,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-20 16:36:03,875 INFO L175 Difference]: Start difference. First operand has 467 places, 664 transitions, 9660 flow. Second operand 10 states and 164 transitions. [2024-06-20 16:36:03,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 677 transitions, 11084 flow [2024-06-20 16:36:11,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 677 transitions, 10843 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:11,304 INFO L231 Difference]: Finished difference. Result has 468 places, 665 transitions, 9557 flow [2024-06-20 16:36:11,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9419, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9557, PETRI_PLACES=468, PETRI_TRANSITIONS=665} [2024-06-20 16:36:11,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-20 16:36:11,305 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 665 transitions, 9557 flow [2024-06-20 16:36:11,305 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) [2024-06-20 16:36:11,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:11,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:11,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:36:11,306 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:11,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1407062917, now seen corresponding path program 19 times [2024-06-20 16:36:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642315782] [2024-06-20 16:36:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642315782] [2024-06-20 16:36:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642315782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:12,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:12,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:12,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046704837] [2024-06-20 16:36:12,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:12,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:12,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:12,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:36:12,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 665 transitions, 9557 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) [2024-06-20 16:36:12,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:12,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:36:12,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:13,775 INFO L124 PetriNetUnfolderBase]: 3444/5551 cut-off events. [2024-06-20 16:36:13,775 INFO L125 PetriNetUnfolderBase]: For 1225152/1225156 co-relation queries the response was YES. [2024-06-20 16:36:13,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65312 conditions, 5551 events. 3444/5551 cut-off events. For 1225152/1225156 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34133 event pairs, 677 based on Foata normal form. 3/5553 useless extension candidates. Maximal degree in co-relation 65094. Up to 4907 conditions per place. [2024-06-20 16:36:13,877 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 548 selfloop transitions, 127 changer transitions 0/680 dead transitions. [2024-06-20 16:36:13,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 680 transitions, 10968 flow [2024-06-20 16:36:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:36:13,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:36:13,878 INFO L175 Difference]: Start difference. First operand has 468 places, 665 transitions, 9557 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:36:13,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 680 transitions, 10968 flow [2024-06-20 16:36:20,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 680 transitions, 10731 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:20,182 INFO L231 Difference]: Finished difference. Result has 470 places, 669 transitions, 9635 flow [2024-06-20 16:36:20,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9320, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9635, PETRI_PLACES=470, PETRI_TRANSITIONS=669} [2024-06-20 16:36:20,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-20 16:36:20,182 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 669 transitions, 9635 flow [2024-06-20 16:36:20,182 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) [2024-06-20 16:36:20,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:20,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:20,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:36:20,183 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:20,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash 207139504, now seen corresponding path program 7 times [2024-06-20 16:36:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686272327] [2024-06-20 16:36:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686272327] [2024-06-20 16:36:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686272327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:20,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919674382] [2024-06-20 16:36:20,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:20,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:21,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:36:21,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 669 transitions, 9635 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) [2024-06-20 16:36:21,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:21,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:36:21,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:22,773 INFO L124 PetriNetUnfolderBase]: 3488/5633 cut-off events. [2024-06-20 16:36:22,773 INFO L125 PetriNetUnfolderBase]: For 1346104/1346108 co-relation queries the response was YES. [2024-06-20 16:36:22,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66791 conditions, 5633 events. 3488/5633 cut-off events. For 1346104/1346108 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34859 event pairs, 685 based on Foata normal form. 14/5646 useless extension candidates. Maximal degree in co-relation 66571. Up to 4746 conditions per place. [2024-06-20 16:36:22,871 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 506 selfloop transitions, 177 changer transitions 0/688 dead transitions. [2024-06-20 16:36:22,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 688 transitions, 11343 flow [2024-06-20 16:36:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:36:22,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-20 16:36:22,873 INFO L175 Difference]: Start difference. First operand has 470 places, 669 transitions, 9635 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:36:22,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 688 transitions, 11343 flow [2024-06-20 16:36:29,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 688 transitions, 11149 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:36:29,493 INFO L231 Difference]: Finished difference. Result has 475 places, 671 transitions, 9949 flow [2024-06-20 16:36:29,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9442, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9949, PETRI_PLACES=475, PETRI_TRANSITIONS=671} [2024-06-20 16:36:29,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 16:36:29,494 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 671 transitions, 9949 flow [2024-06-20 16:36:29,494 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) [2024-06-20 16:36:29,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:29,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:36:29,494 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:29,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 207130204, now seen corresponding path program 8 times [2024-06-20 16:36:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056626229] [2024-06-20 16:36:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:30,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:30,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056626229] [2024-06-20 16:36:30,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056626229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:30,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:30,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992719162] [2024-06-20 16:36:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:30,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:36:30,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 671 transitions, 9949 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) [2024-06-20 16:36:30,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:30,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:36:30,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:32,037 INFO L124 PetriNetUnfolderBase]: 3591/5778 cut-off events. [2024-06-20 16:36:32,037 INFO L125 PetriNetUnfolderBase]: For 1476690/1476694 co-relation queries the response was YES. [2024-06-20 16:36:32,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71092 conditions, 5778 events. 3591/5778 cut-off events. For 1476690/1476694 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35696 event pairs, 696 based on Foata normal form. 14/5791 useless extension candidates. Maximal degree in co-relation 70871. Up to 4709 conditions per place. [2024-06-20 16:36:32,142 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 511 selfloop transitions, 181 changer transitions 0/697 dead transitions. [2024-06-20 16:36:32,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 697 transitions, 12255 flow [2024-06-20 16:36:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:36:32,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 16:36:32,144 INFO L175 Difference]: Start difference. First operand has 475 places, 671 transitions, 9949 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:36:32,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 697 transitions, 12255 flow [2024-06-20 16:36:39,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 697 transitions, 11814 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 16:36:39,470 INFO L231 Difference]: Finished difference. Result has 477 places, 675 transitions, 10171 flow [2024-06-20 16:36:39,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9508, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10171, PETRI_PLACES=477, PETRI_TRANSITIONS=675} [2024-06-20 16:36:39,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-20 16:36:39,471 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 675 transitions, 10171 flow [2024-06-20 16:36:39,471 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) [2024-06-20 16:36:39,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:39,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:36:39,472 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:39,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 218181394, now seen corresponding path program 9 times [2024-06-20 16:36:39,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:39,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517602524] [2024-06-20 16:36:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:40,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:40,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517602524] [2024-06-20 16:36:40,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517602524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:40,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:40,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600256511] [2024-06-20 16:36:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:40,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:40,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:36:40,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 675 transitions, 10171 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) [2024-06-20 16:36:40,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:40,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:36:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:42,115 INFO L124 PetriNetUnfolderBase]: 3635/5852 cut-off events. [2024-06-20 16:36:42,115 INFO L125 PetriNetUnfolderBase]: For 1507072/1507076 co-relation queries the response was YES. [2024-06-20 16:36:42,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72225 conditions, 5852 events. 3635/5852 cut-off events. For 1507072/1507076 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36256 event pairs, 728 based on Foata normal form. 14/5865 useless extension candidates. Maximal degree in co-relation 72003. Up to 4971 conditions per place. [2024-06-20 16:36:42,228 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 524 selfloop transitions, 165 changer transitions 0/694 dead transitions. [2024-06-20 16:36:42,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 694 transitions, 11898 flow [2024-06-20 16:36:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:36:42,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-20 16:36:42,230 INFO L175 Difference]: Start difference. First operand has 477 places, 675 transitions, 10171 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:36:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 694 transitions, 11898 flow [2024-06-20 16:36:49,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 694 transitions, 11430 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-20 16:36:49,559 INFO L231 Difference]: Finished difference. Result has 480 places, 677 transitions, 10194 flow [2024-06-20 16:36:49,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9715, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10194, PETRI_PLACES=480, PETRI_TRANSITIONS=677} [2024-06-20 16:36:49,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 16:36:49,560 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 677 transitions, 10194 flow [2024-06-20 16:36:49,560 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) [2024-06-20 16:36:49,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:49,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:36:49,560 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:49,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:49,561 INFO L85 PathProgramCache]: Analyzing trace with hash -852754236, now seen corresponding path program 10 times [2024-06-20 16:36:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:49,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275803370] [2024-06-20 16:36:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:50,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:50,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275803370] [2024-06-20 16:36:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275803370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:50,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:50,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:50,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753012418] [2024-06-20 16:36:50,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:50,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:50,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:50,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:36:50,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 677 transitions, 10194 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) [2024-06-20 16:36:50,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:50,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:36:50,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:52,203 INFO L124 PetriNetUnfolderBase]: 3607/5808 cut-off events. [2024-06-20 16:36:52,204 INFO L125 PetriNetUnfolderBase]: For 1403725/1403729 co-relation queries the response was YES. [2024-06-20 16:36:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69513 conditions, 5808 events. 3607/5808 cut-off events. For 1403725/1403729 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35938 event pairs, 707 based on Foata normal form. 14/5821 useless extension candidates. Maximal degree in co-relation 69290. Up to 5339 conditions per place. [2024-06-20 16:36:52,314 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 616 selfloop transitions, 72 changer transitions 0/693 dead transitions. [2024-06-20 16:36:52,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 693 transitions, 11760 flow [2024-06-20 16:36:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:36:52,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:36:52,315 INFO L175 Difference]: Start difference. First operand has 480 places, 677 transitions, 10194 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:36:52,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 693 transitions, 11760 flow [2024-06-20 16:36:59,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 693 transitions, 11273 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-20 16:36:59,437 INFO L231 Difference]: Finished difference. Result has 482 places, 677 transitions, 9858 flow [2024-06-20 16:36:59,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9707, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9858, PETRI_PLACES=482, PETRI_TRANSITIONS=677} [2024-06-20 16:36:59,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-20 16:36:59,438 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 677 transitions, 9858 flow [2024-06-20 16:36:59,438 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) [2024-06-20 16:36:59,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:59,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:59,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:36:59,438 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:59,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash 146192500, now seen corresponding path program 5 times [2024-06-20 16:36:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442590149] [2024-06-20 16:36:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:00,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:00,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442590149] [2024-06-20 16:37:00,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442590149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:00,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:00,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:00,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645494537] [2024-06-20 16:37:00,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:00,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:00,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:00,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:37:00,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 677 transitions, 9858 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) [2024-06-20 16:37:00,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:00,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:37:00,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:02,475 INFO L124 PetriNetUnfolderBase]: 3759/6054 cut-off events. [2024-06-20 16:37:02,476 INFO L125 PetriNetUnfolderBase]: For 1607889/1607893 co-relation queries the response was YES. [2024-06-20 16:37:02,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75155 conditions, 6054 events. 3759/6054 cut-off events. For 1607889/1607893 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 37868 event pairs, 734 based on Foata normal form. 14/6067 useless extension candidates. Maximal degree in co-relation 74931. Up to 5357 conditions per place. [2024-06-20 16:37:02,590 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 605 selfloop transitions, 93 changer transitions 0/703 dead transitions. [2024-06-20 16:37:02,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 703 transitions, 12058 flow [2024-06-20 16:37:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-20 16:37:02,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-20 16:37:02,592 INFO L175 Difference]: Start difference. First operand has 482 places, 677 transitions, 9858 flow. Second operand 11 states and 190 transitions. [2024-06-20 16:37:02,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 703 transitions, 12058 flow [2024-06-20 16:37:10,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 703 transitions, 11889 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:10,317 INFO L231 Difference]: Finished difference. Result has 486 places, 681 transitions, 10132 flow [2024-06-20 16:37:10,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9689, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10132, PETRI_PLACES=486, PETRI_TRANSITIONS=681} [2024-06-20 16:37:10,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 445 predicate places. [2024-06-20 16:37:10,318 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 681 transitions, 10132 flow [2024-06-20 16:37:10,318 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) [2024-06-20 16:37:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:10,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:37:10,319 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:37:10,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1874381884, now seen corresponding path program 6 times [2024-06-20 16:37:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766722321] [2024-06-20 16:37:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766722321] [2024-06-20 16:37:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766722321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:11,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578433165] [2024-06-20 16:37:11,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:11,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:11,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:11,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:37:11,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 681 transitions, 10132 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) [2024-06-20 16:37:11,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:11,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:37:11,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:13,329 INFO L124 PetriNetUnfolderBase]: 3815/6142 cut-off events. [2024-06-20 16:37:13,330 INFO L125 PetriNetUnfolderBase]: For 1704201/1704205 co-relation queries the response was YES. [2024-06-20 16:37:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77199 conditions, 6142 events. 3815/6142 cut-off events. For 1704201/1704205 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 38535 event pairs, 757 based on Foata normal form. 18/6159 useless extension candidates. Maximal degree in co-relation 76973. Up to 5695 conditions per place. [2024-06-20 16:37:13,450 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 642 selfloop transitions, 52 changer transitions 0/699 dead transitions. [2024-06-20 16:37:13,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 699 transitions, 11790 flow [2024-06-20 16:37:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 16:37:13,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-20 16:37:13,452 INFO L175 Difference]: Start difference. First operand has 486 places, 681 transitions, 10132 flow. Second operand 10 states and 169 transitions. [2024-06-20 16:37:13,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 699 transitions, 11790 flow [2024-06-20 16:37:22,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 699 transitions, 11557 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-20 16:37:22,248 INFO L231 Difference]: Finished difference. Result has 490 places, 683 transitions, 10149 flow [2024-06-20 16:37:22,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9899, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10149, PETRI_PLACES=490, PETRI_TRANSITIONS=683} [2024-06-20 16:37:22,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-20 16:37:22,249 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 683 transitions, 10149 flow [2024-06-20 16:37:22,249 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) [2024-06-20 16:37:22,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:22,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:37:22,250 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:37:22,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1930824894, now seen corresponding path program 7 times [2024-06-20 16:37:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644435320] [2024-06-20 16:37:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:23,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644435320] [2024-06-20 16:37:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644435320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:23,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391491476] [2024-06-20 16:37:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:23,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:23,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:23,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:37:23,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 683 transitions, 10149 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) [2024-06-20 16:37:23,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:23,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:37:23,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:25,502 INFO L124 PetriNetUnfolderBase]: 4005/6459 cut-off events. [2024-06-20 16:37:25,503 INFO L125 PetriNetUnfolderBase]: For 2102807/2102809 co-relation queries the response was YES. [2024-06-20 16:37:25,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81455 conditions, 6459 events. 4005/6459 cut-off events. For 2102807/2102809 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 41098 event pairs, 872 based on Foata normal form. 52/6507 useless extension candidates. Maximal degree in co-relation 81227. Up to 5067 conditions per place. [2024-06-20 16:37:25,619 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 444 selfloop transitions, 250 changer transitions 18/717 dead transitions. [2024-06-20 16:37:25,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 717 transitions, 13103 flow [2024-06-20 16:37:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:37:25,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-20 16:37:25,621 INFO L175 Difference]: Start difference. First operand has 490 places, 683 transitions, 10149 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:37:25,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 717 transitions, 13103 flow [2024-06-20 16:37:34,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 717 transitions, 12920 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 16:37:34,376 INFO L231 Difference]: Finished difference. Result has 496 places, 680 transitions, 10815 flow [2024-06-20 16:37:34,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9966, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10815, PETRI_PLACES=496, PETRI_TRANSITIONS=680} [2024-06-20 16:37:34,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-20 16:37:34,377 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 680 transitions, 10815 flow [2024-06-20 16:37:34,377 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) [2024-06-20 16:37:34,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:34,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:37:34,378 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:37:34,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1992113952, now seen corresponding path program 8 times [2024-06-20 16:37:34,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:34,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183891166] [2024-06-20 16:37:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:34,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:35,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:35,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183891166] [2024-06-20 16:37:35,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183891166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:35,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:35,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:35,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016122840] [2024-06-20 16:37:35,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:35,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:35,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:37:35,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 680 transitions, 10815 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) [2024-06-20 16:37:35,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:35,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:37:35,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:37,399 INFO L124 PetriNetUnfolderBase]: 3858/6225 cut-off events. [2024-06-20 16:37:37,399 INFO L125 PetriNetUnfolderBase]: For 1740720/1740724 co-relation queries the response was YES. [2024-06-20 16:37:37,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79041 conditions, 6225 events. 3858/6225 cut-off events. For 1740720/1740724 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39298 event pairs, 775 based on Foata normal form. 18/6242 useless extension candidates. Maximal degree in co-relation 78809. Up to 5682 conditions per place. [2024-06-20 16:37:37,525 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 597 selfloop transitions, 97 changer transitions 0/699 dead transitions. [2024-06-20 16:37:37,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 699 transitions, 12480 flow [2024-06-20 16:37:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-20 16:37:37,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:37:37,527 INFO L175 Difference]: Start difference. First operand has 496 places, 680 transitions, 10815 flow. Second operand 11 states and 187 transitions. [2024-06-20 16:37:37,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 699 transitions, 12480 flow [2024-06-20 16:37:44,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 699 transitions, 11878 flow, removed 76 selfloop flow, removed 9 redundant places. [2024-06-20 16:37:44,187 INFO L231 Difference]: Finished difference. Result has 498 places, 682 transitions, 10554 flow [2024-06-20 16:37:44,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10217, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10554, PETRI_PLACES=498, PETRI_TRANSITIONS=682} [2024-06-20 16:37:44,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 16:37:44,188 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 682 transitions, 10554 flow [2024-06-20 16:37:44,188 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) [2024-06-20 16:37:44,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:44,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:44,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:37:44,189 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:37:44,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 218568088, now seen corresponding path program 9 times [2024-06-20 16:37:44,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:44,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595149382] [2024-06-20 16:37:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:44,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:45,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595149382] [2024-06-20 16:37:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595149382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:45,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:45,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210564635] [2024-06-20 16:37:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:45,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:37:45,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 682 transitions, 10554 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) [2024-06-20 16:37:45,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:45,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:37:45,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:47,677 INFO L124 PetriNetUnfolderBase]: 4058/6571 cut-off events. [2024-06-20 16:37:47,677 INFO L125 PetriNetUnfolderBase]: For 2007108/2007112 co-relation queries the response was YES. [2024-06-20 16:37:47,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82820 conditions, 6571 events. 4058/6571 cut-off events. For 2007108/2007112 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42071 event pairs, 864 based on Foata normal form. 45/6613 useless extension candidates. Maximal degree in co-relation 82589. Up to 5299 conditions per place. [2024-06-20 16:37:47,797 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 503 selfloop transitions, 193 changer transitions 12/713 dead transitions. [2024-06-20 16:37:47,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 713 transitions, 13084 flow [2024-06-20 16:37:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-20 16:37:47,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-20 16:37:47,799 INFO L175 Difference]: Start difference. First operand has 498 places, 682 transitions, 10554 flow. Second operand 11 states and 203 transitions. [2024-06-20 16:37:47,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 713 transitions, 13084 flow [2024-06-20 16:37:55,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 713 transitions, 12750 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:55,870 INFO L231 Difference]: Finished difference. Result has 501 places, 680 transitions, 11164 flow [2024-06-20 16:37:55,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10220, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11164, PETRI_PLACES=501, PETRI_TRANSITIONS=680} [2024-06-20 16:37:55,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-20 16:37:55,871 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 680 transitions, 11164 flow [2024-06-20 16:37:55,871 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) [2024-06-20 16:37:55,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:55,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:37:55,871 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:37:55,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1919712324, now seen corresponding path program 10 times [2024-06-20 16:37:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34932450] [2024-06-20 16:37:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:56,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:56,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34932450] [2024-06-20 16:37:56,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34932450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:56,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:56,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987837759] [2024-06-20 16:37:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:56,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:37:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 680 transitions, 11164 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) [2024-06-20 16:37:56,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:56,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:37:56,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:59,260 INFO L124 PetriNetUnfolderBase]: 4477/7296 cut-off events. [2024-06-20 16:37:59,261 INFO L125 PetriNetUnfolderBase]: For 2714286/2714290 co-relation queries the response was YES. [2024-06-20 16:37:59,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103481 conditions, 7296 events. 4477/7296 cut-off events. For 2714286/2714290 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 47735 event pairs, 966 based on Foata normal form. 44/7335 useless extension candidates. Maximal degree in co-relation 103248. Up to 5158 conditions per place. [2024-06-20 16:37:59,406 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 527 selfloop transitions, 182 changer transitions 0/714 dead transitions. [2024-06-20 16:37:59,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 714 transitions, 14022 flow [2024-06-20 16:37:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 16:37:59,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-20 16:37:59,408 INFO L175 Difference]: Start difference. First operand has 501 places, 680 transitions, 11164 flow. Second operand 10 states and 192 transitions. [2024-06-20 16:37:59,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 714 transitions, 14022 flow [2024-06-20 16:38:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 714 transitions, 13238 flow, removed 180 selfloop flow, removed 14 redundant places. [2024-06-20 16:38:08,509 INFO L231 Difference]: Finished difference. Result has 498 places, 684 transitions, 11055 flow [2024-06-20 16:38:08,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11055, PETRI_PLACES=498, PETRI_TRANSITIONS=684} [2024-06-20 16:38:08,510 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 16:38:08,510 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 684 transitions, 11055 flow [2024-06-20 16:38:08,510 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) [2024-06-20 16:38:08,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:08,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:08,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:38:08,510 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:38:08,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1977368802, now seen corresponding path program 11 times [2024-06-20 16:38:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:08,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145447166] [2024-06-20 16:38:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145447166] [2024-06-20 16:38:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145447166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:09,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:38:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007398406] [2024-06-20 16:38:09,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:38:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:38:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:38:09,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:38:09,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 684 transitions, 11055 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) [2024-06-20 16:38:09,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:09,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:38:09,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:12,535 INFO L124 PetriNetUnfolderBase]: 4636/7539 cut-off events. [2024-06-20 16:38:12,535 INFO L125 PetriNetUnfolderBase]: For 2670623/2670627 co-relation queries the response was YES. [2024-06-20 16:38:12,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110056 conditions, 7539 events. 4636/7539 cut-off events. For 2670623/2670627 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49614 event pairs, 1084 based on Foata normal form. 14/7552 useless extension candidates. Maximal degree in co-relation 109825. Up to 6365 conditions per place. [2024-06-20 16:38:12,765 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 610 selfloop transitions, 102 changer transitions 0/717 dead transitions. [2024-06-20 16:38:12,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 717 transitions, 13874 flow [2024-06-20 16:38:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:12,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-20 16:38:12,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-20 16:38:12,767 INFO L175 Difference]: Start difference. First operand has 498 places, 684 transitions, 11055 flow. Second operand 11 states and 193 transitions. [2024-06-20 16:38:12,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 717 transitions, 13874 flow [2024-06-20 16:38:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 717 transitions, 13537 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-20 16:38:22,364 INFO L231 Difference]: Finished difference. Result has 505 places, 690 transitions, 11330 flow [2024-06-20 16:38:22,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10718, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11330, PETRI_PLACES=505, PETRI_TRANSITIONS=690} [2024-06-20 16:38:22,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-20 16:38:22,366 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 690 transitions, 11330 flow [2024-06-20 16:38:22,366 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) [2024-06-20 16:38:22,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:22,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:22,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:38:22,367 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:38:22,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1874769694, now seen corresponding path program 12 times [2024-06-20 16:38:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794771646] [2024-06-20 16:38:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:22,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:23,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794771646] [2024-06-20 16:38:23,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794771646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:23,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:23,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:38:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003047092] [2024-06-20 16:38:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:38:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:38:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:38:23,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:38:23,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 690 transitions, 11330 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) [2024-06-20 16:38:23,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:23,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:38:23,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:26,596 INFO L124 PetriNetUnfolderBase]: 4683/7628 cut-off events. [2024-06-20 16:38:26,596 INFO L125 PetriNetUnfolderBase]: For 2708971/2708975 co-relation queries the response was YES. [2024-06-20 16:38:26,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111302 conditions, 7628 events. 4683/7628 cut-off events. For 2708971/2708975 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50486 event pairs, 1109 based on Foata normal form. 14/7641 useless extension candidates. Maximal degree in co-relation 111067. Up to 6830 conditions per place. [2024-06-20 16:38:26,853 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 644 selfloop transitions, 65 changer transitions 0/714 dead transitions. [2024-06-20 16:38:26,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 714 transitions, 13599 flow [2024-06-20 16:38:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:38:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:38:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:38:26,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 16:38:26,854 INFO L175 Difference]: Start difference. First operand has 505 places, 690 transitions, 11330 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:38:26,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 714 transitions, 13599 flow [2024-06-20 16:38:36,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 714 transitions, 13318 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-20 16:38:36,536 INFO L231 Difference]: Finished difference. Result has 510 places, 693 transitions, 11437 flow [2024-06-20 16:38:36,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11057, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11437, PETRI_PLACES=510, PETRI_TRANSITIONS=693} [2024-06-20 16:38:36,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-20 16:38:36,537 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 693 transitions, 11437 flow [2024-06-20 16:38:36,537 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) [2024-06-20 16:38:36,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:36,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:36,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:38:36,537 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:38:36,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1874756674, now seen corresponding path program 13 times [2024-06-20 16:38:36,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:36,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416054877] [2024-06-20 16:38:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:36,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:37,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:37,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416054877] [2024-06-20 16:38:37,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416054877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:37,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:37,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:38:37,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152868110] [2024-06-20 16:38:37,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:37,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:38:37,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:37,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:38:37,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:38:37,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:38:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 693 transitions, 11437 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) [2024-06-20 16:38:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:37,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:38:37,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:40,853 INFO L124 PetriNetUnfolderBase]: 4693/7636 cut-off events. [2024-06-20 16:38:40,854 INFO L125 PetriNetUnfolderBase]: For 2706753/2706757 co-relation queries the response was YES. [2024-06-20 16:38:40,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109381 conditions, 7636 events. 4693/7636 cut-off events. For 2706753/2706757 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50525 event pairs, 1153 based on Foata normal form. 18/7653 useless extension candidates. Maximal degree in co-relation 109143. Up to 7092 conditions per place. [2024-06-20 16:38:41,045 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 638 selfloop transitions, 68 changer transitions 0/711 dead transitions. [2024-06-20 16:38:41,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 711 transitions, 13151 flow [2024-06-20 16:38:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:38:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:38:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:38:41,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:38:41,047 INFO L175 Difference]: Start difference. First operand has 510 places, 693 transitions, 11437 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:38:41,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 711 transitions, 13151 flow [2024-06-20 16:38:50,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 711 transitions, 12834 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-20 16:38:50,947 INFO L231 Difference]: Finished difference. Result has 512 places, 695 transitions, 11422 flow [2024-06-20 16:38:50,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11422, PETRI_PLACES=512, PETRI_TRANSITIONS=695} [2024-06-20 16:38:50,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 471 predicate places. [2024-06-20 16:38:50,965 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 695 transitions, 11422 flow [2024-06-20 16:38:50,965 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) [2024-06-20 16:38:50,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:50,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:50,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:38:50,965 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:38:50,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:50,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1876619826, now seen corresponding path program 1 times [2024-06-20 16:38:50,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:50,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954614899] [2024-06-20 16:38:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:50,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954614899] [2024-06-20 16:38:51,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954614899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:51,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:38:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47526765] [2024-06-20 16:38:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:38:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:38:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:38:52,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:38:52,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 695 transitions, 11422 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) [2024-06-20 16:38:52,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:52,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:38:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:54,958 INFO L124 PetriNetUnfolderBase]: 4721/7689 cut-off events. [2024-06-20 16:38:54,959 INFO L125 PetriNetUnfolderBase]: For 2641286/2641288 co-relation queries the response was YES. [2024-06-20 16:38:55,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109209 conditions, 7689 events. 4721/7689 cut-off events. For 2641286/2641288 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 51005 event pairs, 1130 based on Foata normal form. 8/7696 useless extension candidates. Maximal degree in co-relation 108971. Up to 7247 conditions per place. [2024-06-20 16:38:55,138 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 691 selfloop transitions, 22 changer transitions 0/718 dead transitions. [2024-06-20 16:38:55,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 718 transitions, 13072 flow [2024-06-20 16:38:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:38:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:38:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:38:55,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-20 16:38:55,140 INFO L175 Difference]: Start difference. First operand has 512 places, 695 transitions, 11422 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:38:55,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 718 transitions, 13072 flow [2024-06-20 16:39:04,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 718 transitions, 12838 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-20 16:39:04,740 INFO L231 Difference]: Finished difference. Result has 514 places, 696 transitions, 11285 flow [2024-06-20 16:39:04,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11188, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11285, PETRI_PLACES=514, PETRI_TRANSITIONS=696} [2024-06-20 16:39:04,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 473 predicate places. [2024-06-20 16:39:04,740 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 696 transitions, 11285 flow [2024-06-20 16:39:04,740 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) [2024-06-20 16:39:04,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:04,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:39:04,741 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:39:04,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 230204020, now seen corresponding path program 2 times [2024-06-20 16:39:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387665172] [2024-06-20 16:39:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387665172] [2024-06-20 16:39:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387665172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:05,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:05,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:39:05,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425394334] [2024-06-20 16:39:05,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:05,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:39:05,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:39:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:39:06,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:39:06,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 696 transitions, 11285 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) [2024-06-20 16:39:06,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:06,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:39:06,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:09,089 INFO L124 PetriNetUnfolderBase]: 4749/7739 cut-off events. [2024-06-20 16:39:09,089 INFO L125 PetriNetUnfolderBase]: For 2653634/2653636 co-relation queries the response was YES. [2024-06-20 16:39:09,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109226 conditions, 7739 events. 4749/7739 cut-off events. For 2653634/2653636 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 51415 event pairs, 1138 based on Foata normal form. 8/7746 useless extension candidates. Maximal degree in co-relation 108987. Up to 7268 conditions per place. [2024-06-20 16:39:09,388 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 671 selfloop transitions, 40 changer transitions 0/716 dead transitions. [2024-06-20 16:39:09,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 716 transitions, 12925 flow [2024-06-20 16:39:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:39:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:39:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 16:39:09,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 16:39:09,390 INFO L175 Difference]: Start difference. First operand has 514 places, 696 transitions, 11285 flow. Second operand 10 states and 168 transitions. [2024-06-20 16:39:09,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 716 transitions, 12925 flow [2024-06-20 16:39:19,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 716 transitions, 12860 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:39:19,366 INFO L231 Difference]: Finished difference. Result has 516 places, 697 transitions, 11355 flow [2024-06-20 16:39:19,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11220, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11355, PETRI_PLACES=516, PETRI_TRANSITIONS=697} [2024-06-20 16:39:19,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-20 16:39:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 697 transitions, 11355 flow [2024-06-20 16:39:19,367 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) [2024-06-20 16:39:19,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:19,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:39:19,367 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:39:19,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1284861842, now seen corresponding path program 3 times [2024-06-20 16:39:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205995008] [2024-06-20 16:39:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:20,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:20,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205995008] [2024-06-20 16:39:20,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205995008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:20,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:20,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:39:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742859592] [2024-06-20 16:39:20,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:20,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:39:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:39:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:39:20,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:39:20,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 697 transitions, 11355 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) [2024-06-20 16:39:20,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:20,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:39:20,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:23,805 INFO L124 PetriNetUnfolderBase]: 4815/7841 cut-off events. [2024-06-20 16:39:23,805 INFO L125 PetriNetUnfolderBase]: For 2750806/2750808 co-relation queries the response was YES. [2024-06-20 16:39:23,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112127 conditions, 7841 events. 4815/7841 cut-off events. For 2750806/2750808 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 52216 event pairs, 1146 based on Foata normal form. 6/7846 useless extension candidates. Maximal degree in co-relation 111887. Up to 7308 conditions per place. [2024-06-20 16:39:23,985 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 685 selfloop transitions, 32 changer transitions 0/722 dead transitions. [2024-06-20 16:39:23,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 722 transitions, 13446 flow [2024-06-20 16:39:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:39:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:39:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:39:23,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:39:23,987 INFO L175 Difference]: Start difference. First operand has 516 places, 697 transitions, 11355 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:39:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 722 transitions, 13446 flow [2024-06-20 16:39:32,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 722 transitions, 13345 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:39:32,279 INFO L231 Difference]: Finished difference. Result has 519 places, 699 transitions, 11434 flow [2024-06-20 16:39:32,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11254, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11434, PETRI_PLACES=519, PETRI_TRANSITIONS=699} [2024-06-20 16:39:32,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 478 predicate places. [2024-06-20 16:39:32,283 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 699 transitions, 11434 flow [2024-06-20 16:39:32,283 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) [2024-06-20 16:39:32,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:32,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:39:32,284 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:39:32,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1331854690, now seen corresponding path program 4 times [2024-06-20 16:39:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:32,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354020841] [2024-06-20 16:39:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354020841] [2024-06-20 16:39:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354020841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:33,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:33,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:39:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586024770] [2024-06-20 16:39:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:33,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:39:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:39:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:39:33,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:39:33,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 699 transitions, 11434 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) [2024-06-20 16:39:33,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:33,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:39:33,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:36,680 INFO L124 PetriNetUnfolderBase]: 4853/7889 cut-off events. [2024-06-20 16:39:36,680 INFO L125 PetriNetUnfolderBase]: For 2817732/2817734 co-relation queries the response was YES. [2024-06-20 16:39:36,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113127 conditions, 7889 events. 4853/7889 cut-off events. For 2817732/2817734 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 52497 event pairs, 1179 based on Foata normal form. 8/7896 useless extension candidates. Maximal degree in co-relation 112885. Up to 7451 conditions per place. [2024-06-20 16:39:36,846 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 693 selfloop transitions, 27 changer transitions 0/725 dead transitions. [2024-06-20 16:39:36,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 725 transitions, 13180 flow [2024-06-20 16:39:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:39:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:39:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:39:36,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-20 16:39:36,848 INFO L175 Difference]: Start difference. First operand has 519 places, 699 transitions, 11434 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:39:36,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 725 transitions, 13180 flow [2024-06-20 16:39:47,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 725 transitions, 13086 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 16:39:47,118 INFO L231 Difference]: Finished difference. Result has 523 places, 706 transitions, 11547 flow [2024-06-20 16:39:47,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11351, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11547, PETRI_PLACES=523, PETRI_TRANSITIONS=706} [2024-06-20 16:39:47,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 482 predicate places. [2024-06-20 16:39:47,119 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 706 transitions, 11547 flow [2024-06-20 16:39:47,119 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) [2024-06-20 16:39:47,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:47,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:47,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 16:39:47,119 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:39:47,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1290433472, now seen corresponding path program 5 times [2024-06-20 16:39:47,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:47,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364645722] [2024-06-20 16:39:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:47,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:48,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:48,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364645722] [2024-06-20 16:39:48,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364645722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:48,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:48,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:39:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996151396] [2024-06-20 16:39:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:48,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:39:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:39:48,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:39:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:39:48,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 706 transitions, 11547 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) [2024-06-20 16:39:48,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:48,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:39:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:51,321 INFO L124 PetriNetUnfolderBase]: 4835/7873 cut-off events. [2024-06-20 16:39:51,321 INFO L125 PetriNetUnfolderBase]: For 2756180/2756182 co-relation queries the response was YES. [2024-06-20 16:39:51,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111536 conditions, 7873 events. 4835/7873 cut-off events. For 2756180/2756182 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 52484 event pairs, 1150 based on Foata normal form. 8/7880 useless extension candidates. Maximal degree in co-relation 111292. Up to 7425 conditions per place. [2024-06-20 16:39:51,481 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 693 selfloop transitions, 27 changer transitions 0/725 dead transitions. [2024-06-20 16:39:51,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 725 transitions, 13157 flow [2024-06-20 16:39:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:39:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:39:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:39:51,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-20 16:39:51,483 INFO L175 Difference]: Start difference. First operand has 523 places, 706 transitions, 11547 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:39:51,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 725 transitions, 13157 flow [2024-06-20 16:40:00,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 725 transitions, 13066 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:00,068 INFO L231 Difference]: Finished difference. Result has 527 places, 706 transitions, 11515 flow [2024-06-20 16:40:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11456, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11515, PETRI_PLACES=527, PETRI_TRANSITIONS=706} [2024-06-20 16:40:00,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 486 predicate places. [2024-06-20 16:40:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 706 transitions, 11515 flow [2024-06-20 16:40:00,069 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) [2024-06-20 16:40:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:00,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 16:40:00,070 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:40:00,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1414839360, now seen corresponding path program 6 times [2024-06-20 16:40:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502139864] [2024-06-20 16:40:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502139864] [2024-06-20 16:40:01,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502139864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:01,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:01,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:01,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820625160] [2024-06-20 16:40:01,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:01,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:01,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:01,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:40:01,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 706 transitions, 11515 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) [2024-06-20 16:40:01,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:01,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:40:01,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:04,359 INFO L124 PetriNetUnfolderBase]: 4863/7908 cut-off events. [2024-06-20 16:40:04,359 INFO L125 PetriNetUnfolderBase]: For 2786529/2786533 co-relation queries the response was YES. [2024-06-20 16:40:04,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112143 conditions, 7908 events. 4863/7908 cut-off events. For 2786529/2786533 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 52645 event pairs, 1179 based on Foata normal form. 10/7917 useless extension candidates. Maximal degree in co-relation 111898. Up to 7442 conditions per place. [2024-06-20 16:40:04,526 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 670 selfloop transitions, 48 changer transitions 0/723 dead transitions. [2024-06-20 16:40:04,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 723 transitions, 13164 flow [2024-06-20 16:40:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:40:04,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-20 16:40:04,528 INFO L175 Difference]: Start difference. First operand has 527 places, 706 transitions, 11515 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:40:04,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 723 transitions, 13164 flow [2024-06-20 16:40:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 723 transitions, 13053 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-20 16:40:13,528 INFO L231 Difference]: Finished difference. Result has 525 places, 707 transitions, 11558 flow [2024-06-20 16:40:13,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11404, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11558, PETRI_PLACES=525, PETRI_TRANSITIONS=707} [2024-06-20 16:40:13,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 484 predicate places. [2024-06-20 16:40:13,529 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 707 transitions, 11558 flow [2024-06-20 16:40:13,529 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) [2024-06-20 16:40:13,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:13,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:13,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 16:40:13,530 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:40:13,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash -717889882, now seen corresponding path program 7 times [2024-06-20 16:40:13,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:13,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340651495] [2024-06-20 16:40:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:13,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340651495] [2024-06-20 16:40:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340651495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:14,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342193735] [2024-06-20 16:40:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:14,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:40:14,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 707 transitions, 11558 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) [2024-06-20 16:40:14,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:14,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:40:14,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:17,675 INFO L124 PetriNetUnfolderBase]: 4891/7955 cut-off events. [2024-06-20 16:40:17,675 INFO L125 PetriNetUnfolderBase]: For 2824734/2824736 co-relation queries the response was YES. [2024-06-20 16:40:17,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113066 conditions, 7955 events. 4891/7955 cut-off events. For 2824734/2824736 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 53029 event pairs, 1189 based on Foata normal form. 8/7961 useless extension candidates. Maximal degree in co-relation 112823. Up to 7462 conditions per place. [2024-06-20 16:40:17,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 657 selfloop transitions, 62 changer transitions 0/724 dead transitions. [2024-06-20 16:40:17,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 724 transitions, 13210 flow [2024-06-20 16:40:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:40:17,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:40:17,835 INFO L175 Difference]: Start difference. First operand has 525 places, 707 transitions, 11558 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:40:17,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 724 transitions, 13210 flow [2024-06-20 16:40:27,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 724 transitions, 13093 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:40:27,830 INFO L231 Difference]: Finished difference. Result has 527 places, 708 transitions, 11624 flow [2024-06-20 16:40:27,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11441, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11624, PETRI_PLACES=527, PETRI_TRANSITIONS=708} [2024-06-20 16:40:27,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 486 predicate places. [2024-06-20 16:40:27,831 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 708 transitions, 11624 flow [2024-06-20 16:40:27,831 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) [2024-06-20 16:40:27,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:27,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 16:40:27,831 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:40:27,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash -718091692, now seen corresponding path program 8 times [2024-06-20 16:40:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:27,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105280853] [2024-06-20 16:40:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:29,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105280853] [2024-06-20 16:40:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105280853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:29,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:29,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:29,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524105307] [2024-06-20 16:40:29,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:29,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:29,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:40:29,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 708 transitions, 11624 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) [2024-06-20 16:40:29,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:29,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:40:29,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:32,443 INFO L124 PetriNetUnfolderBase]: 4914/7997 cut-off events. [2024-06-20 16:40:32,443 INFO L125 PetriNetUnfolderBase]: For 2830205/2830209 co-relation queries the response was YES. [2024-06-20 16:40:32,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113210 conditions, 7997 events. 4914/7997 cut-off events. For 2830205/2830209 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 53426 event pairs, 1188 based on Foata normal form. 10/8006 useless extension candidates. Maximal degree in co-relation 112966. Up to 7517 conditions per place. [2024-06-20 16:40:32,609 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 673 selfloop transitions, 49 changer transitions 0/727 dead transitions. [2024-06-20 16:40:32,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 727 transitions, 13296 flow [2024-06-20 16:40:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 16:40:32,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-20 16:40:32,611 INFO L175 Difference]: Start difference. First operand has 527 places, 708 transitions, 11624 flow. Second operand 10 states and 169 transitions. [2024-06-20 16:40:32,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 727 transitions, 13296 flow [2024-06-20 16:40:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 727 transitions, 13147 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:40:42,915 INFO L231 Difference]: Finished difference. Result has 529 places, 711 transitions, 11653 flow [2024-06-20 16:40:42,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11475, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11653, PETRI_PLACES=529, PETRI_TRANSITIONS=711} [2024-06-20 16:40:42,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-20 16:40:42,915 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 711 transitions, 11653 flow [2024-06-20 16:40:42,915 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) [2024-06-20 16:40:42,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 16:40:42,916 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:40:42,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash -717882442, now seen corresponding path program 9 times [2024-06-20 16:40:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:42,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452131988] [2024-06-20 16:40:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:44,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:44,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452131988] [2024-06-20 16:40:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452131988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:44,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842514745] [2024-06-20 16:40:44,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:44,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:44,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:40:44,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 711 transitions, 11653 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) [2024-06-20 16:40:44,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:44,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:40:44,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:47,219 INFO L124 PetriNetUnfolderBase]: 4934/8029 cut-off events. [2024-06-20 16:40:47,219 INFO L125 PetriNetUnfolderBase]: For 2835099/2835103 co-relation queries the response was YES.