./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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 17:02:37,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:02:37,341 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:02:37,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:02:37,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:02:37,369 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:02:37,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:02:37,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:02:37,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:02:37,372 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:02:37,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:02:37,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:02:37,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:02:37,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:02:37,374 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:02:37,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:02:37,374 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:02:37,374 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:02:37,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:02:37,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:02:37,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:02:37,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:02:37,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:02:37,375 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:02:37,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:02:37,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:02:37,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:02:37,376 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:02:37,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:02:37,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:02:37,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:02:37,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:02:37,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:02:37,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:02:37,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:02:37,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:02:37,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:02:37,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:02:37,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:02:37,618 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:02:37,618 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:02:37,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 17:02:38,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:02:38,832 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:02:38,832 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 17:02:38,844 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69db8d3c/a04baf7ff9804620a37730958c0805e4/FLAG0d5014902 [2024-06-20 17:02:38,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69db8d3c/a04baf7ff9804620a37730958c0805e4 [2024-06-20 17:02:38,866 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:02:38,866 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:02:38,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-20 17:02:39,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:02:39,005 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:02:39,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:02:39,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:02:39,011 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:02:39,012 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:02:38" (1/2) ... [2024-06-20 17:02:39,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654b7d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:02:39, skipping insertion in model container [2024-06-20 17:02:39,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:02:38" (1/2) ... [2024-06-20 17:02:39,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@248dd53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:02:39, skipping insertion in model container [2024-06-20 17:02:39,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:02:39" (2/2) ... [2024-06-20 17:02:39,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654b7d04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:02:39, skipping insertion in model container [2024-06-20 17:02:39,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:02:39" (2/2) ... [2024-06-20 17:02:39,015 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:02:39,088 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:02:39,089 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) [2024-06-20 17:02:39,089 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) [2024-06-20 17:02:39,090 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) [2024-06-20 17:02:39,090 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:02:39,090 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-20 17:02:39,126 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:02:39,422 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:02:39,433 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:02:39,545 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:02:39,582 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:02:39,583 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:02:39 WrapperNode [2024-06-20 17:02:39,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:02:39,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:02:39,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:02:39,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:02:39,589 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,616 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,651 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-20 17:02:39,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:02:39,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:02:39,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:02:39,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:02:39,661 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,661 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,675 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,693 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 17:02:39,694 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,695 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,701 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,702 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,703 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,704 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:02:39,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:02:39,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:02:39,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:02:39,708 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 05:02:39" (1/1) ... [2024-06-20 17:02:39,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:02:39,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:02:39,736 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 17:02:39,738 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 17:02:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:02:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:02:39,768 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:02:39,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:02:39,768 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:02:39,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:02:39,768 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:02:39,769 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:02:39,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:02:39,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:02:39,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:02:39,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:02:39,771 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 17:02:39,873 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:02:39,875 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:02:40,220 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:02:40,228 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:02:40,338 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:02:40,338 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:02:40,338 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:02:40 BoogieIcfgContainer [2024-06-20 17:02:40,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:02:40,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:02:40,340 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:02:40,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:02:40,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:02:38" (1/4) ... [2024-06-20 17:02:40,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa32623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:02:40, skipping insertion in model container [2024-06-20 17:02:40,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:02:39" (2/4) ... [2024-06-20 17:02:40,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa32623 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:02:40, skipping insertion in model container [2024-06-20 17:02:40,343 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 05:02:39" (3/4) ... [2024-06-20 17:02:40,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa32623 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:02:40, skipping insertion in model container [2024-06-20 17:02:40,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:02:40" (4/4) ... [2024-06-20 17:02:40,344 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 17:02:40,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:02:40,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:02:40,357 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:02:40,394 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:02:40,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:02:40,448 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 17:02:40,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:02:40,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:02:40,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:02:40,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 17:02:40,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:02:40,474 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;@34e0b259, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:02:40,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:02:40,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:02:40,481 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:02:40,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:02:40,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:40,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:02:40,482 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 17:02:40,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash 362811812, now seen corresponding path program 1 times [2024-06-20 17:02:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:40,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230332389] [2024-06-20 17:02:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:41,373 INFO 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 17:02:41,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:41,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230332389] [2024-06-20 17:02:41,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230332389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:41,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:41,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:02:41,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547506230] [2024-06-20 17:02:41,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:02:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:02:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:02:41,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 17:02:41,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 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 17:02:41,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:41,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 17:02:41,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:41,781 INFO L124 PetriNetUnfolderBase]: 1152/1761 cut-off events. [2024-06-20 17:02:41,781 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 17:02:41,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3578 conditions, 1761 events. 1152/1761 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8407 event pairs, 785 based on Foata normal form. 1/1725 useless extension candidates. Maximal degree in co-relation 3566. Up to 1732 conditions per place. [2024-06-20 17:02:41,792 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 17:02:41,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-20 17:02:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:02:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:02:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-20 17:02:41,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 17:02:41,811 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-20 17:02:41,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-20 17:02:41,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:02:41,816 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 17:02:41,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 17:02:41,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 17:02:41,820 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 17:02:41,820 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 17:02:41,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:41,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:41,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:02:41,821 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 17:02:41,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:41,822 INFO L85 PathProgramCache]: Analyzing trace with hash 769830979, now seen corresponding path program 1 times [2024-06-20 17:02:41,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:41,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066986107] [2024-06-20 17:02:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066986107] [2024-06-20 17:02:42,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066986107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:42,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:42,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:02:42,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664289437] [2024-06-20 17:02:42,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:42,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:02:42,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:02:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:02:42,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 17:02:42,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:42,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:42,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 17:02:42,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:42,676 INFO L124 PetriNetUnfolderBase]: 1168/1795 cut-off events. [2024-06-20 17:02:42,676 INFO L125 PetriNetUnfolderBase]: For 366/374 co-relation queries the response was YES. [2024-06-20 17:02:42,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 1795 events. 1168/1795 cut-off events. For 366/374 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8694 event pairs, 595 based on Foata normal form. 13/1806 useless extension candidates. Maximal degree in co-relation 4116. Up to 1669 conditions per place. [2024-06-20 17:02:42,685 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2024-06-20 17:02:42,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2024-06-20 17:02:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:02:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:02:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-20 17:02:42,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 17:02:42,689 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 108 transitions. [2024-06-20 17:02:42,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2024-06-20 17:02:42,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:02:42,693 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-20 17:02:42,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-20 17:02:42,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 17:02:42,693 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-20 17:02:42,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:42,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:42,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:42,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:02:42,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:42,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1615943924, now seen corresponding path program 1 times [2024-06-20 17:02:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:42,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103389906] [2024-06-20 17:02:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:42,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:43,378 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 17:02:43,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:43,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103389906] [2024-06-20 17:02:43,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103389906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:43,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:43,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:02:43,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990493627] [2024-06-20 17:02:43,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:43,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:02:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:02:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:02:43,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:02:43,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 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 17:02:43,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:43,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:02:43,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:43,715 INFO L124 PetriNetUnfolderBase]: 1163/1784 cut-off events. [2024-06-20 17:02:43,716 INFO L125 PetriNetUnfolderBase]: For 1189/1206 co-relation queries the response was YES. [2024-06-20 17:02:43,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4881 conditions, 1784 events. 1163/1784 cut-off events. For 1189/1206 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8538 event pairs, 690 based on Foata normal form. 8/1790 useless extension candidates. Maximal degree in co-relation 4865. Up to 1738 conditions per place. [2024-06-20 17:02:43,724 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 17:02:43,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 316 flow [2024-06-20 17:02:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:02:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:02:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-20 17:02:43,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:02:43,727 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 100 transitions. [2024-06-20 17:02:43,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 316 flow [2024-06-20 17:02:43,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 312 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:02:43,729 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 212 flow [2024-06-20 17:02:43,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-06-20 17:02:43,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 17:02:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 212 flow [2024-06-20 17:02:43,730 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 17:02:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:02:43,731 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 17:02:43,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 580485505, now seen corresponding path program 1 times [2024-06-20 17:02:43,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:43,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806552052] [2024-06-20 17:02:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:44,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806552052] [2024-06-20 17:02:44,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806552052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:44,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:44,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:02:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56960172] [2024-06-20 17:02:44,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:44,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:02:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:02:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:02:44,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 17:02:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:44,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:44,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 17:02:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:45,166 INFO L124 PetriNetUnfolderBase]: 1203/1852 cut-off events. [2024-06-20 17:02:45,166 INFO L125 PetriNetUnfolderBase]: For 2090/2112 co-relation queries the response was YES. [2024-06-20 17:02:45,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5503 conditions, 1852 events. 1203/1852 cut-off events. For 2090/2112 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8977 event pairs, 389 based on Foata normal form. 25/1875 useless extension candidates. Maximal degree in co-relation 5484. Up to 1638 conditions per place. [2024-06-20 17:02:45,176 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-20 17:02:45,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 490 flow [2024-06-20 17:02:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:02:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:02:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 17:02:45,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-20 17:02:45,180 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 212 flow. Second operand 6 states and 155 transitions. [2024-06-20 17:02:45,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 490 flow [2024-06-20 17:02:45,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 86 transitions, 470 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:02:45,185 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 272 flow [2024-06-20 17:02:45,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-20 17:02:45,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 17:02:45,187 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 272 flow [2024-06-20 17:02:45,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:45,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:45,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:45,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:02:45,188 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 17:02:45,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1445347293, now seen corresponding path program 1 times [2024-06-20 17:02:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:45,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102107132] [2024-06-20 17:02:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:45,855 INFO 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 17:02:45,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:45,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102107132] [2024-06-20 17:02:45,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102107132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:45,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:45,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:02:45,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104476801] [2024-06-20 17:02:45,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:45,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:02:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:02:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:02:45,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:45,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 272 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 17:02:45,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:45,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:45,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:46,226 INFO L124 PetriNetUnfolderBase]: 1388/2114 cut-off events. [2024-06-20 17:02:46,227 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-06-20 17:02:46,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6839 conditions, 2114 events. 1388/2114 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10313 event pairs, 597 based on Foata normal form. 2/2114 useless extension candidates. Maximal degree in co-relation 6818. Up to 2060 conditions per place. [2024-06-20 17:02:46,239 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-20 17:02:46,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 496 flow [2024-06-20 17:02:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:02:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:02:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 17:02:46,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:02:46,242 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 272 flow. Second operand 6 states and 112 transitions. [2024-06-20 17:02:46,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 496 flow [2024-06-20 17:02:46,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 456 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:02:46,249 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 330 flow [2024-06-20 17:02:46,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-20 17:02:46,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-20 17:02:46,251 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 330 flow [2024-06-20 17:02:46,252 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 17:02:46,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:46,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:46,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:02:46,253 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 17:02:46,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -587341517, now seen corresponding path program 1 times [2024-06-20 17:02:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:46,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364943331] [2024-06-20 17:02:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:46,823 INFO 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 17:02:46,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:46,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364943331] [2024-06-20 17:02:46,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364943331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:46,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:46,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:02:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378089194] [2024-06-20 17:02:46,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:46,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:02:46,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:02:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:02:46,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:02:46,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:46,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:46,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:02:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:47,235 INFO L124 PetriNetUnfolderBase]: 1372/2114 cut-off events. [2024-06-20 17:02:47,235 INFO L125 PetriNetUnfolderBase]: For 4992/5024 co-relation queries the response was YES. [2024-06-20 17:02:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7275 conditions, 2114 events. 1372/2114 cut-off events. For 4992/5024 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10452 event pairs, 515 based on Foata normal form. 20/2126 useless extension candidates. Maximal degree in co-relation 7250. Up to 1986 conditions per place. [2024-06-20 17:02:47,249 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 65 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-06-20 17:02:47,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 617 flow [2024-06-20 17:02:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:02:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:02:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-20 17:02:47,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-20 17:02:47,251 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 330 flow. Second operand 6 states and 127 transitions. [2024-06-20 17:02:47,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 617 flow [2024-06-20 17:02:47,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 609 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 17:02:47,255 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 463 flow [2024-06-20 17:02:47,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-20 17:02:47,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 17:02:47,257 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 463 flow [2024-06-20 17:02:47,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:47,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:47,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:02:47,258 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 17:02:47,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1856085611, now seen corresponding path program 2 times [2024-06-20 17:02:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737917253] [2024-06-20 17:02:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737917253] [2024-06-20 17:02:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737917253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:47,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:47,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:02:47,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217875775] [2024-06-20 17:02:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:02:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:02:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:02:47,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:02:47,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:47,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:47,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:02:47,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:48,283 INFO L124 PetriNetUnfolderBase]: 1462/2257 cut-off events. [2024-06-20 17:02:48,283 INFO L125 PetriNetUnfolderBase]: For 7367/7394 co-relation queries the response was YES. [2024-06-20 17:02:48,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 2257 events. 1462/2257 cut-off events. For 7367/7394 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11383 event pairs, 520 based on Foata normal form. 17/2263 useless extension candidates. Maximal degree in co-relation 8951. Up to 2014 conditions per place. [2024-06-20 17:02:48,299 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 66 selfloop transitions, 25 changer transitions 0/100 dead transitions. [2024-06-20 17:02:48,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 793 flow [2024-06-20 17:02:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:02:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:02:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-20 17:02:48,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-20 17:02:48,301 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 463 flow. Second operand 6 states and 128 transitions. [2024-06-20 17:02:48,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 793 flow [2024-06-20 17:02:48,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 763 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 17:02:48,308 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 578 flow [2024-06-20 17:02:48,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-20 17:02:48,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-20 17:02:48,309 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 578 flow [2024-06-20 17:02:48,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:48,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:48,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:48,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:02:48,310 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 17:02:48,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1856094539, now seen corresponding path program 1 times [2024-06-20 17:02:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:48,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154007043] [2024-06-20 17:02:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:49,202 INFO 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 17:02:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154007043] [2024-06-20 17:02:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154007043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:02:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516481172] [2024-06-20 17:02:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:02:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:02:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:02:49,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:49,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 578 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:49,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:49,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:49,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:49,692 INFO L124 PetriNetUnfolderBase]: 1511/2311 cut-off events. [2024-06-20 17:02:49,692 INFO L125 PetriNetUnfolderBase]: For 9551/9551 co-relation queries the response was YES. [2024-06-20 17:02:49,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9793 conditions, 2311 events. 1511/2311 cut-off events. For 9551/9551 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11451 event pairs, 578 based on Foata normal form. 2/2311 useless extension candidates. Maximal degree in co-relation 9760. Up to 2226 conditions per place. [2024-06-20 17:02:49,706 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-20 17:02:49,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 836 flow [2024-06-20 17:02:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:02:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:02:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:02:49,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 17:02:49,710 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 578 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:02:49,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 836 flow [2024-06-20 17:02:49,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 797 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 17:02:49,718 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 599 flow [2024-06-20 17:02:49,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-20 17:02:49,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-20 17:02:49,720 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 599 flow [2024-06-20 17:02:49,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:49,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:49,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:02:49,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:49,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1027716458, now seen corresponding path program 1 times [2024-06-20 17:02:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990949397] [2024-06-20 17:02:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:50,409 INFO 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 17:02:50,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990949397] [2024-06-20 17:02:50,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990949397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:50,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:50,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:02:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958230682] [2024-06-20 17:02:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:50,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:02:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:02:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:02:50,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:50,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 599 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:50,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:50,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:50,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:50,949 INFO L124 PetriNetUnfolderBase]: 1567/2399 cut-off events. [2024-06-20 17:02:50,949 INFO L125 PetriNetUnfolderBase]: For 10972/10972 co-relation queries the response was YES. [2024-06-20 17:02:50,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10533 conditions, 2399 events. 1567/2399 cut-off events. For 10972/10972 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11846 event pairs, 575 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 10498. Up to 2274 conditions per place. [2024-06-20 17:02:50,964 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-06-20 17:02:50,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 1005 flow [2024-06-20 17:02:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:02:50,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:02:50,967 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 599 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:02:50,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 1005 flow [2024-06-20 17:02:50,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 967 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:50,974 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 757 flow [2024-06-20 17:02:50,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-20 17:02:50,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-20 17:02:50,976 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 757 flow [2024-06-20 17:02:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:50,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:50,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:50,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:02:50,977 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 17:02:50,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash 74925906, now seen corresponding path program 2 times [2024-06-20 17:02:50,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:50,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742752594] [2024-06-20 17:02:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:51,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742752594] [2024-06-20 17:02:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742752594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:51,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:02:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464511251] [2024-06-20 17:02:51,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:51,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:02:51,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:02:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:02:51,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:51,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:51,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:51,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:51,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:52,256 INFO L124 PetriNetUnfolderBase]: 1624/2486 cut-off events. [2024-06-20 17:02:52,257 INFO L125 PetriNetUnfolderBase]: For 13588/13588 co-relation queries the response was YES. [2024-06-20 17:02:52,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11567 conditions, 2486 events. 1624/2486 cut-off events. For 13588/13588 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12369 event pairs, 596 based on Foata normal form. 4/2488 useless extension candidates. Maximal degree in co-relation 11528. Up to 2331 conditions per place. [2024-06-20 17:02:52,276 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 105 selfloop transitions, 30 changer transitions 0/140 dead transitions. [2024-06-20 17:02:52,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 140 transitions, 1251 flow [2024-06-20 17:02:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:02:52,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:02:52,278 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 757 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:02:52,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 140 transitions, 1251 flow [2024-06-20 17:02:52,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 1207 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 17:02:52,291 INFO L231 Difference]: Finished difference. Result has 91 places, 114 transitions, 975 flow [2024-06-20 17:02:52,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=975, PETRI_PLACES=91, PETRI_TRANSITIONS=114} [2024-06-20 17:02:52,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 17:02:52,293 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 114 transitions, 975 flow [2024-06-20 17:02:52,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:52,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:52,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:52,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:02:52,294 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 17:02:52,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1704080478, now seen corresponding path program 3 times [2024-06-20 17:02:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785849673] [2024-06-20 17:02:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785849673] [2024-06-20 17:02:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785849673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:52,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:02:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571735519] [2024-06-20 17:02:52,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:52,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:02:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:02:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:02:53,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:53,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 114 transitions, 975 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:53,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:53,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:53,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:53,440 INFO L124 PetriNetUnfolderBase]: 1662/2548 cut-off events. [2024-06-20 17:02:53,441 INFO L125 PetriNetUnfolderBase]: For 17104/17104 co-relation queries the response was YES. [2024-06-20 17:02:53,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12572 conditions, 2548 events. 1662/2548 cut-off events. For 17104/17104 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12677 event pairs, 564 based on Foata normal form. 4/2545 useless extension candidates. Maximal degree in co-relation 12528. Up to 2262 conditions per place. [2024-06-20 17:02:53,460 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-20 17:02:53,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 145 transitions, 1441 flow [2024-06-20 17:02:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:02:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:02:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 17:02:53,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-20 17:02:53,462 INFO L175 Difference]: Start difference. First operand has 91 places, 114 transitions, 975 flow. Second operand 7 states and 138 transitions. [2024-06-20 17:02:53,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 145 transitions, 1441 flow [2024-06-20 17:02:53,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 145 transitions, 1416 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 17:02:53,475 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1129 flow [2024-06-20 17:02:53,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-20 17:02:53,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-20 17:02:53,476 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1129 flow [2024-06-20 17:02:53,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:53,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:53,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:53,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:02:53,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:53,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:53,477 INFO L85 PathProgramCache]: Analyzing trace with hash -868113680, now seen corresponding path program 4 times [2024-06-20 17:02:53,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:53,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288290657] [2024-06-20 17:02:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:53,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:54,141 INFO 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 17:02:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288290657] [2024-06-20 17:02:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288290657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:54,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:54,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:02:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182426741] [2024-06-20 17:02:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:54,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:02:54,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:02:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:02:54,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:54,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1129 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:54,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:54,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:54,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:54,613 INFO L124 PetriNetUnfolderBase]: 1652/2534 cut-off events. [2024-06-20 17:02:54,613 INFO L125 PetriNetUnfolderBase]: For 20240/20240 co-relation queries the response was YES. [2024-06-20 17:02:54,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13177 conditions, 2534 events. 1652/2534 cut-off events. For 20240/20240 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12639 event pairs, 499 based on Foata normal form. 4/2532 useless extension candidates. Maximal degree in co-relation 13130. Up to 2254 conditions per place. [2024-06-20 17:02:54,633 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-20 17:02:54,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 1492 flow [2024-06-20 17:02:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:02:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:02:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 17:02:54,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 17:02:54,635 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1129 flow. Second operand 7 states and 135 transitions. [2024-06-20 17:02:54,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 1492 flow [2024-06-20 17:02:54,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1365 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:54,654 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 1115 flow [2024-06-20 17:02:54,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1115, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2024-06-20 17:02:54,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-20 17:02:54,655 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 1115 flow [2024-06-20 17:02:54,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:54,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:54,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:54,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:02:54,655 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 17:02:54,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash -868103760, now seen corresponding path program 1 times [2024-06-20 17:02:54,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:54,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145760412] [2024-06-20 17:02:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:54,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:55,575 INFO 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 17:02:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145760412] [2024-06-20 17:02:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145760412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:55,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:55,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157769696] [2024-06-20 17:02:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:55,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:55,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:55,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 1115 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 17:02:55,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:55,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:55,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:56,105 INFO L124 PetriNetUnfolderBase]: 1644/2529 cut-off events. [2024-06-20 17:02:56,105 INFO L125 PetriNetUnfolderBase]: For 21502/21502 co-relation queries the response was YES. [2024-06-20 17:02:56,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13094 conditions, 2529 events. 1644/2529 cut-off events. For 21502/21502 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12668 event pairs, 614 based on Foata normal form. 4/2531 useless extension candidates. Maximal degree in co-relation 13047. Up to 2401 conditions per place. [2024-06-20 17:02:56,124 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 17 changer transitions 0/148 dead transitions. [2024-06-20 17:02:56,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 148 transitions, 1491 flow [2024-06-20 17:02:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:02:56,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 17:02:56,126 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 1115 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:02:56,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 148 transitions, 1491 flow [2024-06-20 17:02:56,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1419 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 17:02:56,151 INFO L231 Difference]: Finished difference. Result has 103 places, 125 transitions, 1110 flow [2024-06-20 17:02:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1110, PETRI_PLACES=103, PETRI_TRANSITIONS=125} [2024-06-20 17:02:56,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-20 17:02:56,152 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 125 transitions, 1110 flow [2024-06-20 17:02:56,153 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 17:02:56,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:56,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:02:56,153 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 17:02:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1028916310, now seen corresponding path program 1 times [2024-06-20 17:02:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956398771] [2024-06-20 17:02:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:56,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:56,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956398771] [2024-06-20 17:02:56,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956398771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:56,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:56,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:02:56,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534568570] [2024-06-20 17:02:56,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:56,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:02:56,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:56,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:02:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:02:57,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:02:57,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 125 transitions, 1110 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 17:02:57,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:57,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:02:57,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:57,548 INFO L124 PetriNetUnfolderBase]: 1589/2474 cut-off events. [2024-06-20 17:02:57,549 INFO L125 PetriNetUnfolderBase]: For 25502/25545 co-relation queries the response was YES. [2024-06-20 17:02:57,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13106 conditions, 2474 events. 1589/2474 cut-off events. For 25502/25545 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12654 event pairs, 556 based on Foata normal form. 23/2448 useless extension candidates. Maximal degree in co-relation 13058. Up to 2215 conditions per place. [2024-06-20 17:02:57,568 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 32 changer transitions 0/160 dead transitions. [2024-06-20 17:02:57,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 160 transitions, 1570 flow [2024-06-20 17:02:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:02:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:02:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-20 17:02:57,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-20 17:02:57,569 INFO L175 Difference]: Start difference. First operand has 103 places, 125 transitions, 1110 flow. Second operand 7 states and 149 transitions. [2024-06-20 17:02:57,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 160 transitions, 1570 flow [2024-06-20 17:02:57,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 160 transitions, 1521 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:57,587 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1259 flow [2024-06-20 17:02:57,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1259, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2024-06-20 17:02:57,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 17:02:57,588 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1259 flow [2024-06-20 17:02:57,588 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 17:02:57,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:57,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:02:57,588 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 17:02:57,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1033684854, now seen corresponding path program 1 times [2024-06-20 17:02:57,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:57,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976110066] [2024-06-20 17:02:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976110066] [2024-06-20 17:02:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976110066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257170759] [2024-06-20 17:02:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:58,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:58,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1259 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 17:02:58,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:58,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:58,952 INFO L124 PetriNetUnfolderBase]: 1672/2577 cut-off events. [2024-06-20 17:02:58,953 INFO L125 PetriNetUnfolderBase]: For 27375/27375 co-relation queries the response was YES. [2024-06-20 17:02:58,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14311 conditions, 2577 events. 1672/2577 cut-off events. For 27375/27375 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12858 event pairs, 393 based on Foata normal form. 4/2579 useless extension candidates. Maximal degree in co-relation 14260. Up to 2326 conditions per place. [2024-06-20 17:02:58,972 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 38 changer transitions 0/165 dead transitions. [2024-06-20 17:02:58,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 165 transitions, 1699 flow [2024-06-20 17:02:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:02:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:02:58,974 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1259 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:02:58,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 165 transitions, 1699 flow [2024-06-20 17:02:58,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 1623 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 17:02:58,996 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1314 flow [2024-06-20 17:02:58,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-20 17:02:58,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-20 17:02:58,996 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1314 flow [2024-06-20 17:02:58,997 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 17:02:58,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:58,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:58,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:02:58,997 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:58,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1149993098, now seen corresponding path program 2 times [2024-06-20 17:02:58,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:58,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450224880] [2024-06-20 17:02:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:58,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:59,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:59,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450224880] [2024-06-20 17:02:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450224880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836001930] [2024-06-20 17:02:59,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:59,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:59,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:02:59,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1314 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 17:02:59,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:59,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:02:59,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:00,482 INFO L124 PetriNetUnfolderBase]: 1694/2601 cut-off events. [2024-06-20 17:03:00,482 INFO L125 PetriNetUnfolderBase]: For 31518/31518 co-relation queries the response was YES. [2024-06-20 17:03:00,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15044 conditions, 2601 events. 1694/2601 cut-off events. For 31518/31518 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13042 event pairs, 520 based on Foata normal form. 4/2598 useless extension candidates. Maximal degree in co-relation 14991. Up to 2297 conditions per place. [2024-06-20 17:03:00,498 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 116 selfloop transitions, 47 changer transitions 0/168 dead transitions. [2024-06-20 17:03:00,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 168 transitions, 1774 flow [2024-06-20 17:03:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:03:00,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:03:00,500 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1314 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:03:00,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 168 transitions, 1774 flow [2024-06-20 17:03:00,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 168 transitions, 1677 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:00,522 INFO L231 Difference]: Finished difference. Result has 113 places, 143 transitions, 1372 flow [2024-06-20 17:03:00,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1372, PETRI_PLACES=113, PETRI_TRANSITIONS=143} [2024-06-20 17:03:00,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 17:03:00,523 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 143 transitions, 1372 flow [2024-06-20 17:03:00,523 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 17:03:00,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:00,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:03:00,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:00,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1295162892, now seen corresponding path program 3 times [2024-06-20 17:03:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490299675] [2024-06-20 17:03:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:00,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:01,293 INFO 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 17:03:01,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490299675] [2024-06-20 17:03:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490299675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:01,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280635673] [2024-06-20 17:03:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:01,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:01,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:01,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:01,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:01,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 143 transitions, 1372 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 17:03:01,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:01,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:01,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:01,813 INFO L124 PetriNetUnfolderBase]: 1705/2646 cut-off events. [2024-06-20 17:03:01,813 INFO L125 PetriNetUnfolderBase]: For 35461/35461 co-relation queries the response was YES. [2024-06-20 17:03:01,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15793 conditions, 2646 events. 1705/2646 cut-off events. For 35461/35461 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13461 event pairs, 448 based on Foata normal form. 2/2642 useless extension candidates. Maximal degree in co-relation 15739. Up to 2413 conditions per place. [2024-06-20 17:03:01,832 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 141 selfloop transitions, 43 changer transitions 0/189 dead transitions. [2024-06-20 17:03:01,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 189 transitions, 2061 flow [2024-06-20 17:03:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:03:01,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:03:01,835 INFO L175 Difference]: Start difference. First operand has 113 places, 143 transitions, 1372 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:03:01,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 189 transitions, 2061 flow [2024-06-20 17:03:01,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 189 transitions, 1907 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:01,867 INFO L231 Difference]: Finished difference. Result has 118 places, 167 transitions, 1645 flow [2024-06-20 17:03:01,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1645, PETRI_PLACES=118, PETRI_TRANSITIONS=167} [2024-06-20 17:03:01,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-20 17:03:01,868 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 167 transitions, 1645 flow [2024-06-20 17:03:01,868 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 17:03:01,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:01,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:03:01,869 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1295459562, now seen corresponding path program 4 times [2024-06-20 17:03:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:01,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393587530] [2024-06-20 17:03:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:02,722 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 17:03:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393587530] [2024-06-20 17:03:02,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393587530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:02,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:02,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941284595] [2024-06-20 17:03:02,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:02,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:02,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:02,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:02,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 167 transitions, 1645 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 17:03:02,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:02,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:02,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:03,373 INFO L124 PetriNetUnfolderBase]: 1711/2641 cut-off events. [2024-06-20 17:03:03,374 INFO L125 PetriNetUnfolderBase]: For 39360/39360 co-relation queries the response was YES. [2024-06-20 17:03:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16347 conditions, 2641 events. 1711/2641 cut-off events. For 39360/39360 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13270 event pairs, 400 based on Foata normal form. 4/2639 useless extension candidates. Maximal degree in co-relation 16289. Up to 2252 conditions per place. [2024-06-20 17:03:03,391 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 110 selfloop transitions, 82 changer transitions 0/197 dead transitions. [2024-06-20 17:03:03,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 197 transitions, 2165 flow [2024-06-20 17:03:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:03:03,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:03:03,393 INFO L175 Difference]: Start difference. First operand has 118 places, 167 transitions, 1645 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:03:03,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 197 transitions, 2165 flow [2024-06-20 17:03:03,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 2100 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:03,425 INFO L231 Difference]: Finished difference. Result has 125 places, 171 transitions, 1824 flow [2024-06-20 17:03:03,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1824, PETRI_PLACES=125, PETRI_TRANSITIONS=171} [2024-06-20 17:03:03,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 17:03:03,425 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 171 transitions, 1824 flow [2024-06-20 17:03:03,425 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 17:03:03,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:03,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:03,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:03:03,426 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 17:03:03,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:03,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1858745691, now seen corresponding path program 1 times [2024-06-20 17:03:03,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:03,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31032442] [2024-06-20 17:03:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31032442] [2024-06-20 17:03:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31032442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:03,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:03:03,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413917485] [2024-06-20 17:03:03,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:03,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:03:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:03:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:03:04,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 171 transitions, 1824 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 17:03:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:04,464 INFO L124 PetriNetUnfolderBase]: 1660/2552 cut-off events. [2024-06-20 17:03:04,464 INFO L125 PetriNetUnfolderBase]: For 41937/41937 co-relation queries the response was YES. [2024-06-20 17:03:04,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16536 conditions, 2552 events. 1660/2552 cut-off events. For 41937/41937 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12747 event pairs, 386 based on Foata normal form. 6/2549 useless extension candidates. Maximal degree in co-relation 16476. Up to 2366 conditions per place. [2024-06-20 17:03:04,482 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 150 selfloop transitions, 26 changer transitions 0/181 dead transitions. [2024-06-20 17:03:04,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 181 transitions, 2232 flow [2024-06-20 17:03:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:03:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:03:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-20 17:03:04,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-20 17:03:04,484 INFO L175 Difference]: Start difference. First operand has 125 places, 171 transitions, 1824 flow. Second operand 5 states and 99 transitions. [2024-06-20 17:03:04,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 181 transitions, 2232 flow [2024-06-20 17:03:04,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 2024 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:04,520 INFO L231 Difference]: Finished difference. Result has 123 places, 171 transitions, 1683 flow [2024-06-20 17:03:04,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1683, PETRI_PLACES=123, PETRI_TRANSITIONS=171} [2024-06-20 17:03:04,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 17:03:04,521 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 171 transitions, 1683 flow [2024-06-20 17:03:04,521 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 17:03:04,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:04,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:03:04,522 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:04,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1660315, now seen corresponding path program 1 times [2024-06-20 17:03:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551299286] [2024-06-20 17:03:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:05,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:05,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551299286] [2024-06-20 17:03:05,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551299286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:05,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:05,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:05,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144670562] [2024-06-20 17:03:05,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:05,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:05,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:05,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:05,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 171 transitions, 1683 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 17:03:05,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:05,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:05,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:05,916 INFO L124 PetriNetUnfolderBase]: 1655/2557 cut-off events. [2024-06-20 17:03:05,917 INFO L125 PetriNetUnfolderBase]: For 39234/39234 co-relation queries the response was YES. [2024-06-20 17:03:05,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15989 conditions, 2557 events. 1655/2557 cut-off events. For 39234/39234 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12795 event pairs, 361 based on Foata normal form. 2/2557 useless extension candidates. Maximal degree in co-relation 15928. Up to 2396 conditions per place. [2024-06-20 17:03:05,933 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 25 changer transitions 0/207 dead transitions. [2024-06-20 17:03:05,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 207 transitions, 2281 flow [2024-06-20 17:03:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:03:05,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:03:05,935 INFO L175 Difference]: Start difference. First operand has 123 places, 171 transitions, 1683 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:03:05,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 207 transitions, 2281 flow [2024-06-20 17:03:05,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 207 transitions, 2210 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:05,965 INFO L231 Difference]: Finished difference. Result has 129 places, 180 transitions, 1807 flow [2024-06-20 17:03:05,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1807, PETRI_PLACES=129, PETRI_TRANSITIONS=180} [2024-06-20 17:03:05,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 17:03:05,966 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 180 transitions, 1807 flow [2024-06-20 17:03:05,966 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 17:03:05,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:05,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:03:05,966 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 17:03:05,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1979460849, now seen corresponding path program 1 times [2024-06-20 17:03:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:05,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662852697] [2024-06-20 17:03:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:05,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:06,977 INFO 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 17:03:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662852697] [2024-06-20 17:03:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662852697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:06,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:06,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234833481] [2024-06-20 17:03:06,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:06,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:07,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 180 transitions, 1807 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:07,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:07,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:07,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:07,701 INFO L124 PetriNetUnfolderBase]: 1747/2719 cut-off events. [2024-06-20 17:03:07,701 INFO L125 PetriNetUnfolderBase]: For 48989/48989 co-relation queries the response was YES. [2024-06-20 17:03:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17252 conditions, 2719 events. 1747/2719 cut-off events. For 48989/48989 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13915 event pairs, 356 based on Foata normal form. 24/2741 useless extension candidates. Maximal degree in co-relation 17189. Up to 2305 conditions per place. [2024-06-20 17:03:07,719 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 52 changer transitions 0/217 dead transitions. [2024-06-20 17:03:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 217 transitions, 2407 flow [2024-06-20 17:03:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:03:07,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 17:03:07,721 INFO L175 Difference]: Start difference. First operand has 129 places, 180 transitions, 1807 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:03:07,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 217 transitions, 2407 flow [2024-06-20 17:03:07,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 217 transitions, 2316 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:07,756 INFO L231 Difference]: Finished difference. Result has 135 places, 182 transitions, 1867 flow [2024-06-20 17:03:07,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1867, PETRI_PLACES=135, PETRI_TRANSITIONS=182} [2024-06-20 17:03:07,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-20 17:03:07,756 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 182 transitions, 1867 flow [2024-06-20 17:03:07,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:07,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:07,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:07,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:03:07,757 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:07,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -598858937, now seen corresponding path program 2 times [2024-06-20 17:03:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:07,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050004094] [2024-06-20 17:03:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:08,690 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 17:03:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050004094] [2024-06-20 17:03:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050004094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:08,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:08,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782423719] [2024-06-20 17:03:08,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:08,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:08,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:08,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:08,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 182 transitions, 1867 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:08,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:08,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:09,346 INFO L124 PetriNetUnfolderBase]: 1764/2743 cut-off events. [2024-06-20 17:03:09,346 INFO L125 PetriNetUnfolderBase]: For 49315/49315 co-relation queries the response was YES. [2024-06-20 17:03:09,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17867 conditions, 2743 events. 1764/2743 cut-off events. For 49315/49315 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14030 event pairs, 424 based on Foata normal form. 4/2741 useless extension candidates. Maximal degree in co-relation 17802. Up to 2499 conditions per place. [2024-06-20 17:03:09,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 44 changer transitions 0/215 dead transitions. [2024-06-20 17:03:09,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 2421 flow [2024-06-20 17:03:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:03:09,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:03:09,368 INFO L175 Difference]: Start difference. First operand has 135 places, 182 transitions, 1867 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:03:09,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 2421 flow [2024-06-20 17:03:09,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 215 transitions, 2310 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:09,409 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 1917 flow [2024-06-20 17:03:09,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1917, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2024-06-20 17:03:09,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 17:03:09,409 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 1917 flow [2024-06-20 17:03:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:09,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:09,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:03:09,410 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:09,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1504868635, now seen corresponding path program 3 times [2024-06-20 17:03:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:09,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839829400] [2024-06-20 17:03:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:09,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:10,252 INFO 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 17:03:10,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839829400] [2024-06-20 17:03:10,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839829400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:10,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:10,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:10,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282866048] [2024-06-20 17:03:10,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:10,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:10,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:10,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 1917 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:10,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:10,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:10,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:10,898 INFO L124 PetriNetUnfolderBase]: 1781/2772 cut-off events. [2024-06-20 17:03:10,939 INFO L125 PetriNetUnfolderBase]: For 53098/53098 co-relation queries the response was YES. [2024-06-20 17:03:10,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18298 conditions, 2772 events. 1781/2772 cut-off events. For 53098/53098 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14190 event pairs, 449 based on Foata normal form. 4/2769 useless extension candidates. Maximal degree in co-relation 18231. Up to 2394 conditions per place. [2024-06-20 17:03:10,960 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 65 changer transitions 0/227 dead transitions. [2024-06-20 17:03:10,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 227 transitions, 2645 flow [2024-06-20 17:03:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:03:10,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:03:10,961 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 1917 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:03:10,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 227 transitions, 2645 flow [2024-06-20 17:03:10,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 227 transitions, 2564 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:11,000 INFO L231 Difference]: Finished difference. Result has 146 places, 197 transitions, 2136 flow [2024-06-20 17:03:11,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2136, PETRI_PLACES=146, PETRI_TRANSITIONS=197} [2024-06-20 17:03:11,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 17:03:11,001 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 197 transitions, 2136 flow [2024-06-20 17:03:11,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:11,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:11,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:11,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:03:11,002 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 17:03:11,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1504542205, now seen corresponding path program 4 times [2024-06-20 17:03:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:11,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84752178] [2024-06-20 17:03:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:11,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84752178] [2024-06-20 17:03:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84752178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:11,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875524571] [2024-06-20 17:03:11,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:11,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:11,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:11,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 197 transitions, 2136 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:12,537 INFO L124 PetriNetUnfolderBase]: 1798/2794 cut-off events. [2024-06-20 17:03:12,537 INFO L125 PetriNetUnfolderBase]: For 58199/58199 co-relation queries the response was YES. [2024-06-20 17:03:12,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19029 conditions, 2794 events. 1798/2794 cut-off events. For 58199/58199 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14279 event pairs, 484 based on Foata normal form. 4/2791 useless extension candidates. Maximal degree in co-relation 18959. Up to 2509 conditions per place. [2024-06-20 17:03:12,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 58 changer transitions 0/226 dead transitions. [2024-06-20 17:03:12,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 226 transitions, 2704 flow [2024-06-20 17:03:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:03:12,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:03:12,560 INFO L175 Difference]: Start difference. First operand has 146 places, 197 transitions, 2136 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:03:12,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 226 transitions, 2704 flow [2024-06-20 17:03:12,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 226 transitions, 2585 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:12,610 INFO L231 Difference]: Finished difference. Result has 151 places, 199 transitions, 2190 flow [2024-06-20 17:03:12,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2190, PETRI_PLACES=151, PETRI_TRANSITIONS=199} [2024-06-20 17:03:12,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 17:03:12,610 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 199 transitions, 2190 flow [2024-06-20 17:03:12,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:12,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:12,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:12,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:03:12,610 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 17:03:12,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1495345435, now seen corresponding path program 5 times [2024-06-20 17:03:12,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:12,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021899745] [2024-06-20 17:03:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:13,567 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 17:03:13,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:13,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021899745] [2024-06-20 17:03:13,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021899745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:13,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:13,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738096315] [2024-06-20 17:03:13,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:13,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:13,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:13,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:13,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 199 transitions, 2190 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:13,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:13,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:13,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:14,221 INFO L124 PetriNetUnfolderBase]: 1848/2885 cut-off events. [2024-06-20 17:03:14,221 INFO L125 PetriNetUnfolderBase]: For 64341/64341 co-relation queries the response was YES. [2024-06-20 17:03:14,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19480 conditions, 2885 events. 1848/2885 cut-off events. For 64341/64341 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14971 event pairs, 492 based on Foata normal form. 20/2898 useless extension candidates. Maximal degree in co-relation 19408. Up to 2447 conditions per place. [2024-06-20 17:03:14,243 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 73 changer transitions 0/230 dead transitions. [2024-06-20 17:03:14,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 230 transitions, 2780 flow [2024-06-20 17:03:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:03:14,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 17:03:14,245 INFO L175 Difference]: Start difference. First operand has 151 places, 199 transitions, 2190 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:03:14,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 230 transitions, 2780 flow [2024-06-20 17:03:14,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 230 transitions, 2574 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 17:03:14,298 INFO L231 Difference]: Finished difference. Result has 152 places, 200 transitions, 2166 flow [2024-06-20 17:03:14,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2166, PETRI_PLACES=152, PETRI_TRANSITIONS=200} [2024-06-20 17:03:14,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-20 17:03:14,299 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 200 transitions, 2166 flow [2024-06-20 17:03:14,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:14,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:14,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:14,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:03:14,299 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:14,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1284934385, now seen corresponding path program 1 times [2024-06-20 17:03:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:14,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302640387] [2024-06-20 17:03:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:14,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:15,006 INFO 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 17:03:15,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302640387] [2024-06-20 17:03:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302640387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:15,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184042093] [2024-06-20 17:03:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:15,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:15,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:03:15,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 200 transitions, 2166 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:15,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:15,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:03:15,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:15,726 INFO L124 PetriNetUnfolderBase]: 1827/2894 cut-off events. [2024-06-20 17:03:15,726 INFO L125 PetriNetUnfolderBase]: For 71033/71100 co-relation queries the response was YES. [2024-06-20 17:03:15,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19394 conditions, 2894 events. 1827/2894 cut-off events. For 71033/71100 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15418 event pairs, 396 based on Foata normal form. 18/2871 useless extension candidates. Maximal degree in co-relation 19323. Up to 2483 conditions per place. [2024-06-20 17:03:15,747 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 35 changer transitions 0/236 dead transitions. [2024-06-20 17:03:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 236 transitions, 2690 flow [2024-06-20 17:03:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-20 17:03:15,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-20 17:03:15,749 INFO L175 Difference]: Start difference. First operand has 152 places, 200 transitions, 2166 flow. Second operand 8 states and 168 transitions. [2024-06-20 17:03:15,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 236 transitions, 2690 flow [2024-06-20 17:03:15,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 236 transitions, 2522 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:15,808 INFO L231 Difference]: Finished difference. Result has 154 places, 204 transitions, 2130 flow [2024-06-20 17:03:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2130, PETRI_PLACES=154, PETRI_TRANSITIONS=204} [2024-06-20 17:03:15,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-20 17:03:15,808 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 204 transitions, 2130 flow [2024-06-20 17:03:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:03:15,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2115579889, now seen corresponding path program 2 times [2024-06-20 17:03:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135286383] [2024-06-20 17:03:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:16,632 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 17:03:16,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:16,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135286383] [2024-06-20 17:03:16,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135286383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:16,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:16,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:16,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372885076] [2024-06-20 17:03:16,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:16,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:16,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:03:16,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 204 transitions, 2130 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:16,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:16,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:03:16,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:17,456 INFO L124 PetriNetUnfolderBase]: 1884/2983 cut-off events. [2024-06-20 17:03:17,457 INFO L125 PetriNetUnfolderBase]: For 78333/78402 co-relation queries the response was YES. [2024-06-20 17:03:17,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20210 conditions, 2983 events. 1884/2983 cut-off events. For 78333/78402 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15997 event pairs, 378 based on Foata normal form. 20/2958 useless extension candidates. Maximal degree in co-relation 20137. Up to 2565 conditions per place. [2024-06-20 17:03:17,483 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 150 selfloop transitions, 42 changer transitions 0/241 dead transitions. [2024-06-20 17:03:17,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 241 transitions, 2730 flow [2024-06-20 17:03:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 17:03:17,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-20 17:03:17,484 INFO L175 Difference]: Start difference. First operand has 154 places, 204 transitions, 2130 flow. Second operand 8 states and 167 transitions. [2024-06-20 17:03:17,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 241 transitions, 2730 flow [2024-06-20 17:03:17,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 241 transitions, 2646 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:03:17,542 INFO L231 Difference]: Finished difference. Result has 158 places, 210 transitions, 2229 flow [2024-06-20 17:03:17,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=158, PETRI_TRANSITIONS=210} [2024-06-20 17:03:17,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 17:03:17,543 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 210 transitions, 2229 flow [2024-06-20 17:03:17,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:17,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:17,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:17,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:03:17,543 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:17,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1483781383, now seen corresponding path program 3 times [2024-06-20 17:03:17,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:17,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790742315] [2024-06-20 17:03:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:17,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:18,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790742315] [2024-06-20 17:03:18,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790742315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:18,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:18,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244812099] [2024-06-20 17:03:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:18,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:18,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:18,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:03:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 210 transitions, 2229 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:18,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:18,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:03:18,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:19,064 INFO L124 PetriNetUnfolderBase]: 1937/3068 cut-off events. [2024-06-20 17:03:19,064 INFO L125 PetriNetUnfolderBase]: For 85578/85671 co-relation queries the response was YES. [2024-06-20 17:03:19,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21184 conditions, 3068 events. 1937/3068 cut-off events. For 85578/85671 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16547 event pairs, 396 based on Foata normal form. 18/3039 useless extension candidates. Maximal degree in co-relation 21109. Up to 2669 conditions per place. [2024-06-20 17:03:19,091 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 158 selfloop transitions, 38 changer transitions 0/245 dead transitions. [2024-06-20 17:03:19,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 245 transitions, 2799 flow [2024-06-20 17:03:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-20 17:03:19,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-20 17:03:19,092 INFO L175 Difference]: Start difference. First operand has 158 places, 210 transitions, 2229 flow. Second operand 8 states and 170 transitions. [2024-06-20 17:03:19,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 245 transitions, 2799 flow [2024-06-20 17:03:19,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 245 transitions, 2698 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:03:19,166 INFO L231 Difference]: Finished difference. Result has 161 places, 212 transitions, 2251 flow [2024-06-20 17:03:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2251, PETRI_PLACES=161, PETRI_TRANSITIONS=212} [2024-06-20 17:03:19,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 17:03:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 212 transitions, 2251 flow [2024-06-20 17:03:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:19,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:03:19,167 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:19,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2122251089, now seen corresponding path program 1 times [2024-06-20 17:03:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378192434] [2024-06-20 17:03:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:20,341 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 17:03:20,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:20,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378192434] [2024-06-20 17:03:20,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378192434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:20,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:20,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455455477] [2024-06-20 17:03:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:20,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:20,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:20,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 212 transitions, 2251 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:20,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:20,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:20,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:21,294 INFO L124 PetriNetUnfolderBase]: 2063/3246 cut-off events. [2024-06-20 17:03:21,295 INFO L125 PetriNetUnfolderBase]: For 81063/81063 co-relation queries the response was YES. [2024-06-20 17:03:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22301 conditions, 3246 events. 2063/3246 cut-off events. For 81063/81063 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17352 event pairs, 417 based on Foata normal form. 2/3246 useless extension candidates. Maximal degree in co-relation 22225. Up to 2917 conditions per place. [2024-06-20 17:03:21,322 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 186 selfloop transitions, 65 changer transitions 0/256 dead transitions. [2024-06-20 17:03:21,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 256 transitions, 3002 flow [2024-06-20 17:03:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 17:03:21,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-20 17:03:21,325 INFO L175 Difference]: Start difference. First operand has 161 places, 212 transitions, 2251 flow. Second operand 10 states and 186 transitions. [2024-06-20 17:03:21,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 256 transitions, 3002 flow [2024-06-20 17:03:21,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 256 transitions, 2911 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:21,390 INFO L231 Difference]: Finished difference. Result has 165 places, 224 transitions, 2457 flow [2024-06-20 17:03:21,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2457, PETRI_PLACES=165, PETRI_TRANSITIONS=224} [2024-06-20 17:03:21,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-20 17:03:21,391 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 224 transitions, 2457 flow [2024-06-20 17:03:21,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:21,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:21,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:21,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:03:21,392 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:21,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1834654545, now seen corresponding path program 2 times [2024-06-20 17:03:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5869806] [2024-06-20 17:03:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:22,414 INFO 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 17:03:22,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5869806] [2024-06-20 17:03:22,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5869806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:22,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:22,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155375386] [2024-06-20 17:03:22,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:22,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:22,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:22,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 224 transitions, 2457 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:22,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:22,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:22,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:23,200 INFO L124 PetriNetUnfolderBase]: 2074/3263 cut-off events. [2024-06-20 17:03:23,200 INFO L125 PetriNetUnfolderBase]: For 87585/87585 co-relation queries the response was YES. [2024-06-20 17:03:23,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22882 conditions, 3263 events. 2074/3263 cut-off events. For 87585/87585 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17408 event pairs, 428 based on Foata normal form. 2/3263 useless extension candidates. Maximal degree in co-relation 22805. Up to 3053 conditions per place. [2024-06-20 17:03:23,227 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 225 selfloop transitions, 28 changer transitions 0/258 dead transitions. [2024-06-20 17:03:23,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 258 transitions, 3123 flow [2024-06-20 17:03:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:03:23,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:03:23,229 INFO L175 Difference]: Start difference. First operand has 165 places, 224 transitions, 2457 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:03:23,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 258 transitions, 3123 flow [2024-06-20 17:03:23,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 2963 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:23,301 INFO L231 Difference]: Finished difference. Result has 168 places, 227 transitions, 2433 flow [2024-06-20 17:03:23,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2433, PETRI_PLACES=168, PETRI_TRANSITIONS=227} [2024-06-20 17:03:23,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 17:03:23,302 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 227 transitions, 2433 flow [2024-06-20 17:03:23,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:23,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:23,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:03:23,303 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:23,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1343405899, now seen corresponding path program 4 times [2024-06-20 17:03:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:23,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440824987] [2024-06-20 17:03:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:24,183 INFO 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 17:03:24,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:24,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440824987] [2024-06-20 17:03:24,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440824987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:24,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:24,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:24,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845505394] [2024-06-20 17:03:24,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:24,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:24,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:24,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:24,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:24,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:03:24,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 227 transitions, 2433 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:24,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:24,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:03:24,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:24,905 INFO L124 PetriNetUnfolderBase]: 2035/3229 cut-off events. [2024-06-20 17:03:24,905 INFO L125 PetriNetUnfolderBase]: For 104900/104971 co-relation queries the response was YES. [2024-06-20 17:03:24,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23011 conditions, 3229 events. 2035/3229 cut-off events. For 104900/104971 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17653 event pairs, 388 based on Foata normal form. 18/3192 useless extension candidates. Maximal degree in co-relation 22933. Up to 2621 conditions per place. [2024-06-20 17:03:24,934 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 63 changer transitions 0/269 dead transitions. [2024-06-20 17:03:24,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 269 transitions, 3233 flow [2024-06-20 17:03:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-20 17:03:24,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-20 17:03:24,935 INFO L175 Difference]: Start difference. First operand has 168 places, 227 transitions, 2433 flow. Second operand 8 states and 169 transitions. [2024-06-20 17:03:24,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 269 transitions, 3233 flow [2024-06-20 17:03:25,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 269 transitions, 3121 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:25,011 INFO L231 Difference]: Finished difference. Result has 171 places, 236 transitions, 2647 flow [2024-06-20 17:03:25,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2647, PETRI_PLACES=171, PETRI_TRANSITIONS=236} [2024-06-20 17:03:25,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-20 17:03:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 236 transitions, 2647 flow [2024-06-20 17:03:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:25,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:03:25,012 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash -250520439, now seen corresponding path program 3 times [2024-06-20 17:03:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405174188] [2024-06-20 17:03:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:26,138 INFO 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 17:03:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405174188] [2024-06-20 17:03:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405174188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:26,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551964005] [2024-06-20 17:03:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:26,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:26,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:26,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:26,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 236 transitions, 2647 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:26,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:26,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:26,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:26,959 INFO L124 PetriNetUnfolderBase]: 2140/3362 cut-off events. [2024-06-20 17:03:26,959 INFO L125 PetriNetUnfolderBase]: For 101142/101142 co-relation queries the response was YES. [2024-06-20 17:03:26,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24655 conditions, 3362 events. 2140/3362 cut-off events. For 101142/101142 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18014 event pairs, 477 based on Foata normal form. 2/3357 useless extension candidates. Maximal degree in co-relation 24574. Up to 2979 conditions per place. [2024-06-20 17:03:26,989 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 187 selfloop transitions, 80 changer transitions 0/272 dead transitions. [2024-06-20 17:03:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 272 transitions, 3366 flow [2024-06-20 17:03:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 17:03:26,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 17:03:26,990 INFO L175 Difference]: Start difference. First operand has 171 places, 236 transitions, 2647 flow. Second operand 10 states and 188 transitions. [2024-06-20 17:03:26,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 272 transitions, 3366 flow [2024-06-20 17:03:27,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 272 transitions, 3291 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:27,096 INFO L231 Difference]: Finished difference. Result has 178 places, 242 transitions, 2841 flow [2024-06-20 17:03:27,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2841, PETRI_PLACES=178, PETRI_TRANSITIONS=242} [2024-06-20 17:03:27,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 17:03:27,097 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 242 transitions, 2841 flow [2024-06-20 17:03:27,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:27,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:27,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:27,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:03:27,097 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:27,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -277514919, now seen corresponding path program 4 times [2024-06-20 17:03:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:27,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290293259] [2024-06-20 17:03:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:28,188 INFO 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 17:03:28,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290293259] [2024-06-20 17:03:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290293259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:28,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:28,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:28,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406749747] [2024-06-20 17:03:28,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:28,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:28,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:28,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:28,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 242 transitions, 2841 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:28,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:28,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:28,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:29,069 INFO L124 PetriNetUnfolderBase]: 2135/3351 cut-off events. [2024-06-20 17:03:29,069 INFO L125 PetriNetUnfolderBase]: For 107307/107307 co-relation queries the response was YES. [2024-06-20 17:03:29,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24989 conditions, 3351 events. 2135/3351 cut-off events. For 107307/107307 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17997 event pairs, 479 based on Foata normal form. 2/3346 useless extension candidates. Maximal degree in co-relation 24906. Up to 2866 conditions per place. [2024-06-20 17:03:29,100 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 108 changer transitions 0/279 dead transitions. [2024-06-20 17:03:29,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 279 transitions, 3571 flow [2024-06-20 17:03:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:03:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:03:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-20 17:03:29,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 17:03:29,102 INFO L175 Difference]: Start difference. First operand has 178 places, 242 transitions, 2841 flow. Second operand 11 states and 205 transitions. [2024-06-20 17:03:29,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 279 transitions, 3571 flow [2024-06-20 17:03:29,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 279 transitions, 3345 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:29,269 INFO L231 Difference]: Finished difference. Result has 182 places, 245 transitions, 2926 flow [2024-06-20 17:03:29,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2926, PETRI_PLACES=182, PETRI_TRANSITIONS=245} [2024-06-20 17:03:29,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 17:03:29,270 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 245 transitions, 2926 flow [2024-06-20 17:03:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:29,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:29,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:03:29,271 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 17:03:29,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash -629234464, now seen corresponding path program 1 times [2024-06-20 17:03:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637519943] [2024-06-20 17:03:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:29,899 INFO 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 17:03:29,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:29,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637519943] [2024-06-20 17:03:29,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637519943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:29,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:29,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6902394] [2024-06-20 17:03:29,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:29,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:29,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:29,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:29,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 245 transitions, 2926 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 17:03:29,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:29,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:29,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:30,550 INFO L124 PetriNetUnfolderBase]: 2140/3369 cut-off events. [2024-06-20 17:03:30,550 INFO L125 PetriNetUnfolderBase]: For 114356/114356 co-relation queries the response was YES. [2024-06-20 17:03:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25505 conditions, 3369 events. 2140/3369 cut-off events. For 114356/114356 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18129 event pairs, 456 based on Foata normal form. 1/3368 useless extension candidates. Maximal degree in co-relation 25421. Up to 3196 conditions per place. [2024-06-20 17:03:30,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 22 changer transitions 0/267 dead transitions. [2024-06-20 17:03:30,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 267 transitions, 3664 flow [2024-06-20 17:03:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:03:30,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 17:03:30,576 INFO L175 Difference]: Start difference. First operand has 182 places, 245 transitions, 2926 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:03:30,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 267 transitions, 3664 flow [2024-06-20 17:03:30,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 267 transitions, 3369 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-20 17:03:30,690 INFO L231 Difference]: Finished difference. Result has 179 places, 251 transitions, 2791 flow [2024-06-20 17:03:30,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2791, PETRI_PLACES=179, PETRI_TRANSITIONS=251} [2024-06-20 17:03:30,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-20 17:03:30,691 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 251 transitions, 2791 flow [2024-06-20 17:03:30,691 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 17:03:30,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:30,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:30,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:03:30,691 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 17:03:30,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -629114494, now seen corresponding path program 2 times [2024-06-20 17:03:30,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:30,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8641989] [2024-06-20 17:03:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:31,341 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 17:03:31,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8641989] [2024-06-20 17:03:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8641989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:31,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:31,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:31,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248215786] [2024-06-20 17:03:31,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:31,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:31,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:31,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:31,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 251 transitions, 2791 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 17:03:31,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:31,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:31,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:32,030 INFO L124 PetriNetUnfolderBase]: 2150/3383 cut-off events. [2024-06-20 17:03:32,030 INFO L125 PetriNetUnfolderBase]: For 118452/118452 co-relation queries the response was YES. [2024-06-20 17:03:32,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25516 conditions, 3383 events. 2150/3383 cut-off events. For 118452/118452 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18170 event pairs, 465 based on Foata normal form. 1/3382 useless extension candidates. Maximal degree in co-relation 25432. Up to 3222 conditions per place. [2024-06-20 17:03:32,057 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 20 changer transitions 0/269 dead transitions. [2024-06-20 17:03:32,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 269 transitions, 3446 flow [2024-06-20 17:03:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:03:32,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 17:03:32,058 INFO L175 Difference]: Start difference. First operand has 179 places, 251 transitions, 2791 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:03:32,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 269 transitions, 3446 flow [2024-06-20 17:03:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 269 transitions, 3373 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:32,156 INFO L231 Difference]: Finished difference. Result has 183 places, 257 transitions, 2863 flow [2024-06-20 17:03:32,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2863, PETRI_PLACES=183, PETRI_TRANSITIONS=257} [2024-06-20 17:03:32,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-20 17:03:32,156 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 257 transitions, 2863 flow [2024-06-20 17:03:32,156 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 17:03:32,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:32,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:32,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:03:32,157 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 17:03:32,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash -629114308, now seen corresponding path program 1 times [2024-06-20 17:03:32,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:32,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600379895] [2024-06-20 17:03:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:32,786 INFO 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 17:03:32,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:32,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600379895] [2024-06-20 17:03:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600379895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:32,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:32,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:32,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439079897] [2024-06-20 17:03:32,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:32,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:32,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 257 transitions, 2863 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 17:03:32,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:32,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:32,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:33,499 INFO L124 PetriNetUnfolderBase]: 2220/3500 cut-off events. [2024-06-20 17:03:33,500 INFO L125 PetriNetUnfolderBase]: For 125917/125917 co-relation queries the response was YES. [2024-06-20 17:03:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26309 conditions, 3500 events. 2220/3500 cut-off events. For 125917/125917 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18993 event pairs, 435 based on Foata normal form. 6/3500 useless extension candidates. Maximal degree in co-relation 26223. Up to 3062 conditions per place. [2024-06-20 17:03:33,535 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 71 changer transitions 0/293 dead transitions. [2024-06-20 17:03:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 293 transitions, 3799 flow [2024-06-20 17:03:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 17:03:33,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-20 17:03:33,537 INFO L175 Difference]: Start difference. First operand has 183 places, 257 transitions, 2863 flow. Second operand 7 states and 138 transitions. [2024-06-20 17:03:33,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 293 transitions, 3799 flow [2024-06-20 17:03:33,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 293 transitions, 3719 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:33,668 INFO L231 Difference]: Finished difference. Result has 187 places, 273 transitions, 3128 flow [2024-06-20 17:03:33,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3128, PETRI_PLACES=187, PETRI_TRANSITIONS=273} [2024-06-20 17:03:33,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-20 17:03:33,669 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 273 transitions, 3128 flow [2024-06-20 17:03:33,669 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 17:03:33,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:33,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:03:33,669 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 17:03:33,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -12808568, now seen corresponding path program 3 times [2024-06-20 17:03:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300266418] [2024-06-20 17:03:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:34,290 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 17:03:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:34,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300266418] [2024-06-20 17:03:34,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300266418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:34,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:34,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:34,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120969895] [2024-06-20 17:03:34,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:34,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:34,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:34,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 273 transitions, 3128 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 17:03:34,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:34,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:34,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:34,981 INFO L124 PetriNetUnfolderBase]: 2217/3499 cut-off events. [2024-06-20 17:03:34,981 INFO L125 PetriNetUnfolderBase]: For 128552/128552 co-relation queries the response was YES. [2024-06-20 17:03:34,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26669 conditions, 3499 events. 2217/3499 cut-off events. For 128552/128552 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19052 event pairs, 459 based on Foata normal form. 1/3498 useless extension candidates. Maximal degree in co-relation 26581. Up to 3310 conditions per place. [2024-06-20 17:03:35,010 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 20 changer transitions 0/287 dead transitions. [2024-06-20 17:03:35,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 287 transitions, 3734 flow [2024-06-20 17:03:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 17:03:35,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:03:35,011 INFO L175 Difference]: Start difference. First operand has 187 places, 273 transitions, 3128 flow. Second operand 6 states and 114 transitions. [2024-06-20 17:03:35,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 287 transitions, 3734 flow [2024-06-20 17:03:35,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 287 transitions, 3600 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:35,124 INFO L231 Difference]: Finished difference. Result has 190 places, 273 transitions, 3044 flow [2024-06-20 17:03:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3044, PETRI_PLACES=190, PETRI_TRANSITIONS=273} [2024-06-20 17:03:35,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-20 17:03:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 273 transitions, 3044 flow [2024-06-20 17:03:35,125 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 17:03:35,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:35,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:03:35,125 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 17:03:35,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2433076, now seen corresponding path program 2 times [2024-06-20 17:03:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:35,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422294898] [2024-06-20 17:03:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:35,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:35,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422294898] [2024-06-20 17:03:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422294898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:35,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648810323] [2024-06-20 17:03:35,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:35,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:35,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 273 transitions, 3044 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 17:03:35,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:35,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:35,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:36,315 INFO L124 PetriNetUnfolderBase]: 2247/3538 cut-off events. [2024-06-20 17:03:36,315 INFO L125 PetriNetUnfolderBase]: For 134629/134629 co-relation queries the response was YES. [2024-06-20 17:03:36,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26853 conditions, 3538 events. 2247/3538 cut-off events. For 134629/134629 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19218 event pairs, 422 based on Foata normal form. 6/3538 useless extension candidates. Maximal degree in co-relation 26764. Up to 3080 conditions per place. [2024-06-20 17:03:36,347 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 71 changer transitions 0/293 dead transitions. [2024-06-20 17:03:36,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 293 transitions, 3846 flow [2024-06-20 17:03:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 17:03:36,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:03:36,349 INFO L175 Difference]: Start difference. First operand has 190 places, 273 transitions, 3044 flow. Second operand 6 states and 120 transitions. [2024-06-20 17:03:36,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 293 transitions, 3846 flow [2024-06-20 17:03:36,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 293 transitions, 3796 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:03:36,546 INFO L231 Difference]: Finished difference. Result has 191 places, 277 transitions, 3210 flow [2024-06-20 17:03:36,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3210, PETRI_PLACES=191, PETRI_TRANSITIONS=277} [2024-06-20 17:03:36,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-20 17:03:36,547 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 277 transitions, 3210 flow [2024-06-20 17:03:36,547 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 17:03:36,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:36,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:36,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:03:36,547 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 17:03:36,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -10239496, now seen corresponding path program 3 times [2024-06-20 17:03:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:36,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655319728] [2024-06-20 17:03:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:36,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655319728] [2024-06-20 17:03:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655319728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625581821] [2024-06-20 17:03:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:37,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:37,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 277 transitions, 3210 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 17:03:37,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:37,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:37,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:37,792 INFO L124 PetriNetUnfolderBase]: 2208/3469 cut-off events. [2024-06-20 17:03:37,792 INFO L125 PetriNetUnfolderBase]: For 136157/136157 co-relation queries the response was YES. [2024-06-20 17:03:37,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26668 conditions, 3469 events. 2208/3469 cut-off events. For 136157/136157 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18695 event pairs, 436 based on Foata normal form. 6/3469 useless extension candidates. Maximal degree in co-relation 26578. Up to 3257 conditions per place. [2024-06-20 17:03:37,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 24 changer transitions 0/287 dead transitions. [2024-06-20 17:03:37,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 287 transitions, 3830 flow [2024-06-20 17:03:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 17:03:37,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:03:37,827 INFO L175 Difference]: Start difference. First operand has 191 places, 277 transitions, 3210 flow. Second operand 6 states and 112 transitions. [2024-06-20 17:03:37,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 287 transitions, 3830 flow [2024-06-20 17:03:37,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 287 transitions, 3739 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:37,976 INFO L231 Difference]: Finished difference. Result has 194 places, 277 transitions, 3174 flow [2024-06-20 17:03:37,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3174, PETRI_PLACES=194, PETRI_TRANSITIONS=277} [2024-06-20 17:03:37,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 17:03:37,977 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 277 transitions, 3174 flow [2024-06-20 17:03:37,977 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 17:03:37,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:37,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:37,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:03:37,978 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 17:03:37,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -10230568, now seen corresponding path program 1 times [2024-06-20 17:03:37,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:37,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231281898] [2024-06-20 17:03:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:37,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:38,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231281898] [2024-06-20 17:03:38,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231281898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:38,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:38,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:03:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124179289] [2024-06-20 17:03:38,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:38,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:03:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:03:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:03:38,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:38,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 277 transitions, 3174 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 17:03:38,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:38,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:39,571 INFO L124 PetriNetUnfolderBase]: 2247/3528 cut-off events. [2024-06-20 17:03:39,572 INFO L125 PetriNetUnfolderBase]: For 140837/140837 co-relation queries the response was YES. [2024-06-20 17:03:39,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26736 conditions, 3528 events. 2247/3528 cut-off events. For 140837/140837 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19050 event pairs, 455 based on Foata normal form. 14/3533 useless extension candidates. Maximal degree in co-relation 26645. Up to 3222 conditions per place. [2024-06-20 17:03:39,606 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 260 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2024-06-20 17:03:39,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 295 transitions, 3912 flow [2024-06-20 17:03:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-20 17:03:39,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 17:03:39,607 INFO L175 Difference]: Start difference. First operand has 194 places, 277 transitions, 3174 flow. Second operand 6 states and 118 transitions. [2024-06-20 17:03:39,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 295 transitions, 3912 flow [2024-06-20 17:03:39,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 295 transitions, 3751 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:39,752 INFO L231 Difference]: Finished difference. Result has 194 places, 279 transitions, 3110 flow [2024-06-20 17:03:39,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3110, PETRI_PLACES=194, PETRI_TRANSITIONS=279} [2024-06-20 17:03:39,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 17:03:39,753 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 279 transitions, 3110 flow [2024-06-20 17:03:39,753 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 17:03:39,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:39,753 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 17:03:39,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:03:39,754 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:39,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash -311187866, now seen corresponding path program 1 times [2024-06-20 17:03:39,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:39,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825295885] [2024-06-20 17:03:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:40,638 INFO 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 17:03:40,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825295885] [2024-06-20 17:03:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825295885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:40,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059883876] [2024-06-20 17:03:40,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:40,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:40,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:40,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:40,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 279 transitions, 3110 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:40,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:40,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:40,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:41,591 INFO L124 PetriNetUnfolderBase]: 2264/3564 cut-off events. [2024-06-20 17:03:41,591 INFO L125 PetriNetUnfolderBase]: For 138593/138593 co-relation queries the response was YES. [2024-06-20 17:03:41,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27125 conditions, 3564 events. 2264/3564 cut-off events. For 138593/138593 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19307 event pairs, 424 based on Foata normal form. 4/3566 useless extension candidates. Maximal degree in co-relation 27034. Up to 3183 conditions per place. [2024-06-20 17:03:41,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 57 changer transitions 0/315 dead transitions. [2024-06-20 17:03:41,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 315 transitions, 3940 flow [2024-06-20 17:03:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:03:41,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:03:41,628 INFO L175 Difference]: Start difference. First operand has 194 places, 279 transitions, 3110 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:03:41,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 315 transitions, 3940 flow [2024-06-20 17:03:41,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 315 transitions, 3865 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:41,856 INFO L231 Difference]: Finished difference. Result has 200 places, 285 transitions, 3299 flow [2024-06-20 17:03:41,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3299, PETRI_PLACES=200, PETRI_TRANSITIONS=285} [2024-06-20 17:03:41,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-20 17:03:41,856 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 285 transitions, 3299 flow [2024-06-20 17:03:41,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:41,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:41,857 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 17:03:41,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:03:41,857 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:41,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash -823143596, now seen corresponding path program 2 times [2024-06-20 17:03:41,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:41,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670583079] [2024-06-20 17:03:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:42,688 INFO 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 17:03:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:42,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670583079] [2024-06-20 17:03:42,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670583079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:42,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:42,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994077351] [2024-06-20 17:03:42,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:42,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 285 transitions, 3299 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:43,637 INFO L124 PetriNetUnfolderBase]: 2281/3591 cut-off events. [2024-06-20 17:03:43,638 INFO L125 PetriNetUnfolderBase]: For 146106/146106 co-relation queries the response was YES. [2024-06-20 17:03:43,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27719 conditions, 3591 events. 2281/3591 cut-off events. For 146106/146106 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19441 event pairs, 408 based on Foata normal form. 4/3593 useless extension candidates. Maximal degree in co-relation 27626. Up to 3313 conditions per place. [2024-06-20 17:03:43,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 25 changer transitions 0/325 dead transitions. [2024-06-20 17:03:43,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 325 transitions, 4181 flow [2024-06-20 17:03:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:03:43,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:03:43,678 INFO L175 Difference]: Start difference. First operand has 200 places, 285 transitions, 3299 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:03:43,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 325 transitions, 4181 flow [2024-06-20 17:03:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 325 transitions, 4026 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:43,872 INFO L231 Difference]: Finished difference. Result has 207 places, 291 transitions, 3357 flow [2024-06-20 17:03:43,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3357, PETRI_PLACES=207, PETRI_TRANSITIONS=291} [2024-06-20 17:03:43,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 17:03:43,872 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 291 transitions, 3357 flow [2024-06-20 17:03:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:43,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:43,876 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 17:03:43,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:03:43,876 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:43,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash -734429966, now seen corresponding path program 3 times [2024-06-20 17:03:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:43,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987745547] [2024-06-20 17:03:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:43,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:44,809 INFO 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 17:03:44,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:44,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987745547] [2024-06-20 17:03:44,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987745547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:44,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:44,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519655931] [2024-06-20 17:03:44,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:44,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:44,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:44,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 291 transitions, 3357 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:44,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:44,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:44,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:45,652 INFO L124 PetriNetUnfolderBase]: 2298/3618 cut-off events. [2024-06-20 17:03:45,652 INFO L125 PetriNetUnfolderBase]: For 153143/153143 co-relation queries the response was YES. [2024-06-20 17:03:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28044 conditions, 3618 events. 2298/3618 cut-off events. For 153143/153143 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19716 event pairs, 444 based on Foata normal form. 4/3620 useless extension candidates. Maximal degree in co-relation 27947. Up to 3380 conditions per place. [2024-06-20 17:03:45,748 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 293 selfloop transitions, 27 changer transitions 0/325 dead transitions. [2024-06-20 17:03:45,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 325 transitions, 4149 flow [2024-06-20 17:03:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:03:45,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:03:45,749 INFO L175 Difference]: Start difference. First operand has 207 places, 291 transitions, 3357 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:03:45,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 325 transitions, 4149 flow [2024-06-20 17:03:45,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 325 transitions, 4001 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:45,931 INFO L231 Difference]: Finished difference. Result has 212 places, 293 transitions, 3330 flow [2024-06-20 17:03:45,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3209, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3330, PETRI_PLACES=212, PETRI_TRANSITIONS=293} [2024-06-20 17:03:45,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-20 17:03:45,932 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 293 transitions, 3330 flow [2024-06-20 17:03:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:45,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:45,932 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 17:03:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:03:45,933 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1039563672, now seen corresponding path program 4 times [2024-06-20 17:03:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:45,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822989923] [2024-06-20 17:03:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822989923] [2024-06-20 17:03:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822989923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:46,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773574720] [2024-06-20 17:03:46,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:46,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:46,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:46,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:46,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 293 transitions, 3330 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:46,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:46,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:46,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:47,699 INFO L124 PetriNetUnfolderBase]: 2315/3645 cut-off events. [2024-06-20 17:03:47,699 INFO L125 PetriNetUnfolderBase]: For 159065/159065 co-relation queries the response was YES. [2024-06-20 17:03:47,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28335 conditions, 3645 events. 2315/3645 cut-off events. For 159065/159065 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19898 event pairs, 437 based on Foata normal form. 4/3647 useless extension candidates. Maximal degree in co-relation 28236. Up to 3366 conditions per place. [2024-06-20 17:03:47,737 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 30 changer transitions 0/330 dead transitions. [2024-06-20 17:03:47,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 330 transitions, 4188 flow [2024-06-20 17:03:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:03:47,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:03:47,738 INFO L175 Difference]: Start difference. First operand has 212 places, 293 transitions, 3330 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:03:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 330 transitions, 4188 flow [2024-06-20 17:03:48,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 330 transitions, 4085 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:48,004 INFO L231 Difference]: Finished difference. Result has 215 places, 297 transitions, 3416 flow [2024-06-20 17:03:48,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3416, PETRI_PLACES=215, PETRI_TRANSITIONS=297} [2024-06-20 17:03:48,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 17:03:48,005 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 297 transitions, 3416 flow [2024-06-20 17:03:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:48,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:48,005 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 17:03:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:03:48,005 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:48,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1764204666, now seen corresponding path program 1 times [2024-06-20 17:03:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:48,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265448491] [2024-06-20 17:03:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:48,931 INFO 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 17:03:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265448491] [2024-06-20 17:03:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265448491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:48,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:03:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936180177] [2024-06-20 17:03:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:03:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:03:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:03:49,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:49,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 297 transitions, 3416 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:49,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:49,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:49,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:49,945 INFO L124 PetriNetUnfolderBase]: 2483/3939 cut-off events. [2024-06-20 17:03:49,945 INFO L125 PetriNetUnfolderBase]: For 189673/189673 co-relation queries the response was YES. [2024-06-20 17:03:49,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31195 conditions, 3939 events. 2483/3939 cut-off events. For 189673/189673 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22159 event pairs, 476 based on Foata normal form. 12/3949 useless extension candidates. Maximal degree in co-relation 31094. Up to 3212 conditions per place. [2024-06-20 17:03:49,978 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 76 changer transitions 0/342 dead transitions. [2024-06-20 17:03:49,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 342 transitions, 4544 flow [2024-06-20 17:03:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 17:03:49,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-20 17:03:49,980 INFO L175 Difference]: Start difference. First operand has 215 places, 297 transitions, 3416 flow. Second operand 10 states and 193 transitions. [2024-06-20 17:03:49,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 342 transitions, 4544 flow [2024-06-20 17:03:50,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 342 transitions, 4392 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:50,201 INFO L231 Difference]: Finished difference. Result has 220 places, 300 transitions, 3539 flow [2024-06-20 17:03:50,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3539, PETRI_PLACES=220, PETRI_TRANSITIONS=300} [2024-06-20 17:03:50,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-20 17:03:50,201 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 300 transitions, 3539 flow [2024-06-20 17:03:50,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:50,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:50,202 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 17:03:50,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:03:50,202 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:50,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash -408865742, now seen corresponding path program 2 times [2024-06-20 17:03:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:50,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60776263] [2024-06-20 17:03:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:51,303 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 17:03:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:51,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60776263] [2024-06-20 17:03:51,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60776263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:51,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:51,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:03:51,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134732695] [2024-06-20 17:03:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:03:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:03:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:03:51,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:51,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 300 transitions, 3539 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:51,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:51,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:51,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:52,516 INFO L124 PetriNetUnfolderBase]: 2558/4064 cut-off events. [2024-06-20 17:03:52,516 INFO L125 PetriNetUnfolderBase]: For 201889/201889 co-relation queries the response was YES. [2024-06-20 17:03:52,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32256 conditions, 4064 events. 2558/4064 cut-off events. For 201889/201889 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23040 event pairs, 496 based on Foata normal form. 16/4078 useless extension candidates. Maximal degree in co-relation 32153. Up to 3587 conditions per place. [2024-06-20 17:03:52,561 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 68 changer transitions 0/343 dead transitions. [2024-06-20 17:03:52,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 343 transitions, 4434 flow [2024-06-20 17:03:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:03:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:03:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 17:03:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-20 17:03:52,562 INFO L175 Difference]: Start difference. First operand has 220 places, 300 transitions, 3539 flow. Second operand 11 states and 206 transitions. [2024-06-20 17:03:52,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 343 transitions, 4434 flow [2024-06-20 17:03:52,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 343 transitions, 4299 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:52,808 INFO L231 Difference]: Finished difference. Result has 225 places, 303 transitions, 3613 flow [2024-06-20 17:03:52,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3613, PETRI_PLACES=225, PETRI_TRANSITIONS=303} [2024-06-20 17:03:52,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 17:03:52,809 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 303 transitions, 3613 flow [2024-06-20 17:03:52,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:52,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:52,809 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 17:03:52,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:03:52,810 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:52,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash -734424014, now seen corresponding path program 3 times [2024-06-20 17:03:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:52,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255414634] [2024-06-20 17:03:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:52,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:53,978 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 17:03:53,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:53,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255414634] [2024-06-20 17:03:53,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255414634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:53,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:53,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:03:53,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500910354] [2024-06-20 17:03:53,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:53,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:03:53,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:53,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:03:53,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:03:54,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:54,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 303 transitions, 3613 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:54,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:54,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:54,987 INFO L124 PetriNetUnfolderBase]: 2571/4091 cut-off events. [2024-06-20 17:03:54,988 INFO L125 PetriNetUnfolderBase]: For 205857/205857 co-relation queries the response was YES. [2024-06-20 17:03:55,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31851 conditions, 4091 events. 2571/4091 cut-off events. For 205857/205857 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23289 event pairs, 504 based on Foata normal form. 28/4117 useless extension candidates. Maximal degree in co-relation 31746. Up to 3673 conditions per place. [2024-06-20 17:03:55,029 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 307 selfloop transitions, 31 changer transitions 0/343 dead transitions. [2024-06-20 17:03:55,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 343 transitions, 4493 flow [2024-06-20 17:03:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:03:55,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:03:55,030 INFO L175 Difference]: Start difference. First operand has 225 places, 303 transitions, 3613 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:03:55,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 343 transitions, 4493 flow [2024-06-20 17:03:55,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 343 transitions, 4347 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:03:55,278 INFO L231 Difference]: Finished difference. Result has 226 places, 304 transitions, 3583 flow [2024-06-20 17:03:55,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3583, PETRI_PLACES=226, PETRI_TRANSITIONS=304} [2024-06-20 17:03:55,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-20 17:03:55,279 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 304 transitions, 3583 flow [2024-06-20 17:03:55,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:55,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:55,279 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 17:03:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:03:55,279 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:55,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1794668230, now seen corresponding path program 5 times [2024-06-20 17:03:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965822918] [2024-06-20 17:03:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:56,173 INFO 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 17:03:56,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965822918] [2024-06-20 17:03:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965822918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:56,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:56,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259600179] [2024-06-20 17:03:56,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:56,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:56,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:56,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:56,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 304 transitions, 3583 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:56,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:56,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:56,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:57,085 INFO L124 PetriNetUnfolderBase]: 2588/4115 cut-off events. [2024-06-20 17:03:57,085 INFO L125 PetriNetUnfolderBase]: For 193124/193124 co-relation queries the response was YES. [2024-06-20 17:03:57,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32058 conditions, 4115 events. 2588/4115 cut-off events. For 193124/193124 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23482 event pairs, 509 based on Foata normal form. 4/4113 useless extension candidates. Maximal degree in co-relation 31952. Up to 3716 conditions per place. [2024-06-20 17:03:57,129 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 79 changer transitions 0/333 dead transitions. [2024-06-20 17:03:57,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 333 transitions, 4385 flow [2024-06-20 17:03:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:03:57,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:03:57,130 INFO L175 Difference]: Start difference. First operand has 226 places, 304 transitions, 3583 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:03:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 333 transitions, 4385 flow [2024-06-20 17:03:57,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 333 transitions, 4307 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:03:57,474 INFO L231 Difference]: Finished difference. Result has 227 places, 306 transitions, 3740 flow [2024-06-20 17:03:57,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3740, PETRI_PLACES=227, PETRI_TRANSITIONS=306} [2024-06-20 17:03:57,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-20 17:03:57,475 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 306 transitions, 3740 flow [2024-06-20 17:03:57,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:57,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:57,475 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 17:03:57,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:03:57,475 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash 816444828, now seen corresponding path program 6 times [2024-06-20 17:03:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090213279] [2024-06-20 17:03:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090213279] [2024-06-20 17:03:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090213279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:58,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:58,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131652413] [2024-06-20 17:03:58,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:58,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:58,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:58,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:03:58,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 306 transitions, 3740 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:58,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:58,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:03:58,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:59,287 INFO L124 PetriNetUnfolderBase]: 2605/4132 cut-off events. [2024-06-20 17:03:59,287 INFO L125 PetriNetUnfolderBase]: For 201159/201159 co-relation queries the response was YES. [2024-06-20 17:03:59,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32612 conditions, 4132 events. 2605/4132 cut-off events. For 201159/201159 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23496 event pairs, 504 based on Foata normal form. 4/4130 useless extension candidates. Maximal degree in co-relation 32505. Up to 3743 conditions per place. [2024-06-20 17:03:59,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 73 changer transitions 0/335 dead transitions. [2024-06-20 17:03:59,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 335 transitions, 4550 flow [2024-06-20 17:03:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:03:59,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:03:59,334 INFO L175 Difference]: Start difference. First operand has 227 places, 306 transitions, 3740 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:03:59,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 335 transitions, 4550 flow [2024-06-20 17:03:59,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 335 transitions, 4333 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:59,658 INFO L231 Difference]: Finished difference. Result has 229 places, 308 transitions, 3750 flow [2024-06-20 17:03:59,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3750, PETRI_PLACES=229, PETRI_TRANSITIONS=308} [2024-06-20 17:03:59,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-20 17:03:59,659 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 308 transitions, 3750 flow [2024-06-20 17:03:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:59,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:59,659 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 17:03:59,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:03:59,660 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:59,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash 617143038, now seen corresponding path program 7 times [2024-06-20 17:03:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408520564] [2024-06-20 17:03:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:00,589 INFO 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 17:04:00,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:00,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408520564] [2024-06-20 17:04:00,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408520564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:00,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:00,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320752162] [2024-06-20 17:04:00,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:00,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:00,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 308 transitions, 3750 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:00,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:00,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:00,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:01,610 INFO L124 PetriNetUnfolderBase]: 2622/4169 cut-off events. [2024-06-20 17:04:01,610 INFO L125 PetriNetUnfolderBase]: For 208978/208978 co-relation queries the response was YES. [2024-06-20 17:04:01,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32974 conditions, 4169 events. 2622/4169 cut-off events. For 208978/208978 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23774 event pairs, 514 based on Foata normal form. 4/4167 useless extension candidates. Maximal degree in co-relation 32866. Up to 3770 conditions per place. [2024-06-20 17:04:01,655 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 74 changer transitions 0/337 dead transitions. [2024-06-20 17:04:01,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 337 transitions, 4568 flow [2024-06-20 17:04:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:04:01,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:04:01,656 INFO L175 Difference]: Start difference. First operand has 229 places, 308 transitions, 3750 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:04:01,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 337 transitions, 4568 flow [2024-06-20 17:04:01,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 337 transitions, 4359 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:01,970 INFO L231 Difference]: Finished difference. Result has 231 places, 310 transitions, 3774 flow [2024-06-20 17:04:01,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3774, PETRI_PLACES=231, PETRI_TRANSITIONS=310} [2024-06-20 17:04:01,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-20 17:04:01,971 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 310 transitions, 3774 flow [2024-06-20 17:04:01,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:01,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:01,971 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 17:04:01,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:04:01,971 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:01,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash 616995168, now seen corresponding path program 8 times [2024-06-20 17:04:01,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:01,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194699418] [2024-06-20 17:04:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:02,896 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 17:04:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:02,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194699418] [2024-06-20 17:04:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194699418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:02,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:02,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383805106] [2024-06-20 17:04:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:02,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:03,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:03,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 310 transitions, 3774 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:03,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:03,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:03,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:03,806 INFO L124 PetriNetUnfolderBase]: 2614/4147 cut-off events. [2024-06-20 17:04:03,806 INFO L125 PetriNetUnfolderBase]: For 211636/211636 co-relation queries the response was YES. [2024-06-20 17:04:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32759 conditions, 4147 events. 2614/4147 cut-off events. For 211636/211636 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23591 event pairs, 500 based on Foata normal form. 4/4145 useless extension candidates. Maximal degree in co-relation 32650. Up to 3681 conditions per place. [2024-06-20 17:04:03,850 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 81 changer transitions 0/342 dead transitions. [2024-06-20 17:04:03,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 342 transitions, 4669 flow [2024-06-20 17:04:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:04:03,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:04:03,852 INFO L175 Difference]: Start difference. First operand has 231 places, 310 transitions, 3774 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:04:03,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 342 transitions, 4669 flow [2024-06-20 17:04:04,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 342 transitions, 4436 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:04,206 INFO L231 Difference]: Finished difference. Result has 234 places, 314 transitions, 3867 flow [2024-06-20 17:04:04,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3867, PETRI_PLACES=234, PETRI_TRANSITIONS=314} [2024-06-20 17:04:04,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 17:04:04,207 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 314 transitions, 3867 flow [2024-06-20 17:04:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:04,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:04,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:04,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:04:04,207 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:04,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:04,208 INFO L85 PathProgramCache]: Analyzing trace with hash 816450780, now seen corresponding path program 4 times [2024-06-20 17:04:04,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:04,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498215113] [2024-06-20 17:04:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:04,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:05,415 INFO 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 17:04:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498215113] [2024-06-20 17:04:05,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498215113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:05,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706341850] [2024-06-20 17:04:05,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:05,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:05,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 314 transitions, 3867 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:05,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:05,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:05,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:06,518 INFO L124 PetriNetUnfolderBase]: 2683/4267 cut-off events. [2024-06-20 17:04:06,519 INFO L125 PetriNetUnfolderBase]: For 236478/236478 co-relation queries the response was YES. [2024-06-20 17:04:06,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33800 conditions, 4267 events. 2683/4267 cut-off events. For 236478/236478 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 24529 event pairs, 528 based on Foata normal form. 16/4274 useless extension candidates. Maximal degree in co-relation 33690. Up to 3719 conditions per place. [2024-06-20 17:04:06,565 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 268 selfloop transitions, 80 changer transitions 0/353 dead transitions. [2024-06-20 17:04:06,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 353 transitions, 4781 flow [2024-06-20 17:04:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 17:04:06,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-20 17:04:06,566 INFO L175 Difference]: Start difference. First operand has 234 places, 314 transitions, 3867 flow. Second operand 10 states and 191 transitions. [2024-06-20 17:04:06,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 353 transitions, 4781 flow [2024-06-20 17:04:06,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 353 transitions, 4578 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:06,909 INFO L231 Difference]: Finished difference. Result has 240 places, 318 transitions, 3913 flow [2024-06-20 17:04:06,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3913, PETRI_PLACES=240, PETRI_TRANSITIONS=318} [2024-06-20 17:04:06,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-20 17:04:06,909 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 318 transitions, 3913 flow [2024-06-20 17:04:06,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:06,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:06,910 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 17:04:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:04:06,910 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:06,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash 824069340, now seen corresponding path program 5 times [2024-06-20 17:04:06,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:06,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001237889] [2024-06-20 17:04:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001237889] [2024-06-20 17:04:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001237889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:08,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816269226] [2024-06-20 17:04:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:08,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:08,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:08,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:08,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 318 transitions, 3913 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:09,292 INFO L124 PetriNetUnfolderBase]: 2810/4494 cut-off events. [2024-06-20 17:04:09,292 INFO L125 PetriNetUnfolderBase]: For 262719/262719 co-relation queries the response was YES. [2024-06-20 17:04:09,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36585 conditions, 4494 events. 2810/4494 cut-off events. For 262719/262719 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26266 event pairs, 548 based on Foata normal form. 12/4500 useless extension candidates. Maximal degree in co-relation 36472. Up to 3694 conditions per place. [2024-06-20 17:04:09,345 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 266 selfloop transitions, 88 changer transitions 0/359 dead transitions. [2024-06-20 17:04:09,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 359 transitions, 5103 flow [2024-06-20 17:04:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 17:04:09,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:04:09,346 INFO L175 Difference]: Start difference. First operand has 240 places, 318 transitions, 3913 flow. Second operand 10 states and 195 transitions. [2024-06-20 17:04:09,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 359 transitions, 5103 flow [2024-06-20 17:04:09,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 359 transitions, 4920 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:09,721 INFO L231 Difference]: Finished difference. Result has 243 places, 320 transitions, 4022 flow [2024-06-20 17:04:09,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3730, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4022, PETRI_PLACES=243, PETRI_TRANSITIONS=320} [2024-06-20 17:04:09,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-20 17:04:09,722 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 320 transitions, 4022 flow [2024-06-20 17:04:09,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:09,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:09,722 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 17:04:09,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:04:09,722 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:09,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1225183110, now seen corresponding path program 6 times [2024-06-20 17:04:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:09,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693651392] [2024-06-20 17:04:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:10,840 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 17:04:10,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:10,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693651392] [2024-06-20 17:04:10,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693651392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:10,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:10,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579699360] [2024-06-20 17:04:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:10,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:10,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:10,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 320 transitions, 4022 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:10,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:10,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:10,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:12,025 INFO L124 PetriNetUnfolderBase]: 2912/4678 cut-off events. [2024-06-20 17:04:12,025 INFO L125 PetriNetUnfolderBase]: For 291245/291245 co-relation queries the response was YES. [2024-06-20 17:04:12,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38682 conditions, 4678 events. 2912/4678 cut-off events. For 291245/291245 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27727 event pairs, 469 based on Foata normal form. 12/4684 useless extension candidates. Maximal degree in co-relation 38568. Up to 2946 conditions per place. [2024-06-20 17:04:12,081 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 228 selfloop transitions, 129 changer transitions 0/362 dead transitions. [2024-06-20 17:04:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 362 transitions, 5228 flow [2024-06-20 17:04:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 17:04:12,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:04:12,082 INFO L175 Difference]: Start difference. First operand has 243 places, 320 transitions, 4022 flow. Second operand 10 states and 195 transitions. [2024-06-20 17:04:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 362 transitions, 5228 flow [2024-06-20 17:04:12,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 362 transitions, 5089 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:12,461 INFO L231 Difference]: Finished difference. Result has 247 places, 322 transitions, 4261 flow [2024-06-20 17:04:12,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4261, PETRI_PLACES=247, PETRI_TRANSITIONS=322} [2024-06-20 17:04:12,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-20 17:04:12,462 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 322 transitions, 4261 flow [2024-06-20 17:04:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:12,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:12,462 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 17:04:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:04:12,463 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:12,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1538882340, now seen corresponding path program 7 times [2024-06-20 17:04:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:12,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311146445] [2024-06-20 17:04:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:12,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:13,604 INFO 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 17:04:13,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311146445] [2024-06-20 17:04:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311146445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:13,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:13,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3697839] [2024-06-20 17:04:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:13,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:13,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:13,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 322 transitions, 4261 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:13,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:13,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:13,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:14,791 INFO L124 PetriNetUnfolderBase]: 2953/4749 cut-off events. [2024-06-20 17:04:14,791 INFO L125 PetriNetUnfolderBase]: For 300552/300552 co-relation queries the response was YES. [2024-06-20 17:04:14,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39758 conditions, 4749 events. 2953/4749 cut-off events. For 300552/300552 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28408 event pairs, 597 based on Foata normal form. 12/4755 useless extension candidates. Maximal degree in co-relation 39642. Up to 3843 conditions per place. [2024-06-20 17:04:14,847 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 245 selfloop transitions, 116 changer transitions 0/366 dead transitions. [2024-06-20 17:04:14,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 5435 flow [2024-06-20 17:04:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:04:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:04:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 17:04:14,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722838137472284 [2024-06-20 17:04:14,848 INFO L175 Difference]: Start difference. First operand has 247 places, 322 transitions, 4261 flow. Second operand 11 states and 213 transitions. [2024-06-20 17:04:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 5435 flow [2024-06-20 17:04:15,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 366 transitions, 5245 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:15,368 INFO L231 Difference]: Finished difference. Result has 252 places, 323 transitions, 4368 flow [2024-06-20 17:04:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4368, PETRI_PLACES=252, PETRI_TRANSITIONS=323} [2024-06-20 17:04:15,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 17:04:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 323 transitions, 4368 flow [2024-06-20 17:04:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:15,369 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 17:04:15,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:04:15,369 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:15,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1787310628, now seen corresponding path program 8 times [2024-06-20 17:04:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:15,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661292377] [2024-06-20 17:04:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:16,530 INFO 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 17:04:16,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661292377] [2024-06-20 17:04:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661292377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:16,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615033301] [2024-06-20 17:04:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:16,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:16,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 323 transitions, 4368 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:16,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:16,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:16,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:17,748 INFO L124 PetriNetUnfolderBase]: 3022/4868 cut-off events. [2024-06-20 17:04:17,748 INFO L125 PetriNetUnfolderBase]: For 316914/316914 co-relation queries the response was YES. [2024-06-20 17:04:17,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40879 conditions, 4868 events. 3022/4868 cut-off events. For 316914/316914 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29362 event pairs, 622 based on Foata normal form. 16/4878 useless extension candidates. Maximal degree in co-relation 40761. Up to 4325 conditions per place. [2024-06-20 17:04:17,805 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 271 selfloop transitions, 89 changer transitions 0/365 dead transitions. [2024-06-20 17:04:17,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 5321 flow [2024-06-20 17:04:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:04:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:04:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 17:04:17,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-20 17:04:17,806 INFO L175 Difference]: Start difference. First operand has 252 places, 323 transitions, 4368 flow. Second operand 11 states and 206 transitions. [2024-06-20 17:04:17,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 5321 flow [2024-06-20 17:04:18,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 365 transitions, 4939 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-20 17:04:18,234 INFO L231 Difference]: Finished difference. Result has 254 places, 327 transitions, 4261 flow [2024-06-20 17:04:18,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4261, PETRI_PLACES=254, PETRI_TRANSITIONS=327} [2024-06-20 17:04:18,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 17:04:18,235 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 327 transitions, 4261 flow [2024-06-20 17:04:18,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:18,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:18,235 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 17:04:18,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:04:18,235 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:18,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1539149250, now seen corresponding path program 9 times [2024-06-20 17:04:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333893631] [2024-06-20 17:04:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:19,261 INFO 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 17:04:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:19,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333893631] [2024-06-20 17:04:19,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333893631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:19,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:19,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:19,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571212864] [2024-06-20 17:04:19,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:19,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:19,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:19,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 327 transitions, 4261 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:19,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:19,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:19,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:20,457 INFO L124 PetriNetUnfolderBase]: 3055/4923 cut-off events. [2024-06-20 17:04:20,457 INFO L125 PetriNetUnfolderBase]: For 318020/318020 co-relation queries the response was YES. [2024-06-20 17:04:20,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40502 conditions, 4923 events. 3055/4923 cut-off events. For 318020/318020 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29810 event pairs, 641 based on Foata normal form. 16/4930 useless extension candidates. Maximal degree in co-relation 40383. Up to 4232 conditions per place. [2024-06-20 17:04:20,515 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 238 selfloop transitions, 120 changer transitions 0/363 dead transitions. [2024-06-20 17:04:20,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 363 transitions, 5175 flow [2024-06-20 17:04:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 17:04:20,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:04:20,517 INFO L175 Difference]: Start difference. First operand has 254 places, 327 transitions, 4261 flow. Second operand 10 states and 190 transitions. [2024-06-20 17:04:20,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 363 transitions, 5175 flow [2024-06-20 17:04:21,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 363 transitions, 4987 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 17:04:21,020 INFO L231 Difference]: Finished difference. Result has 256 places, 328 transitions, 4370 flow [2024-06-20 17:04:21,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4370, PETRI_PLACES=256, PETRI_TRANSITIONS=328} [2024-06-20 17:04:21,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-20 17:04:21,021 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 328 transitions, 4370 flow [2024-06-20 17:04:21,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:21,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:21,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:21,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:04:21,021 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:21,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1510898738, now seen corresponding path program 10 times [2024-06-20 17:04:21,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:21,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138840338] [2024-06-20 17:04:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:21,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:22,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138840338] [2024-06-20 17:04:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138840338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:22,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:22,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:22,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72539656] [2024-06-20 17:04:22,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:22,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:22,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 328 transitions, 4370 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:22,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:22,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:22,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:23,490 INFO L124 PetriNetUnfolderBase]: 3113/5025 cut-off events. [2024-06-20 17:04:23,490 INFO L125 PetriNetUnfolderBase]: For 331114/331114 co-relation queries the response was YES. [2024-06-20 17:04:23,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41498 conditions, 5025 events. 3113/5025 cut-off events. For 331114/331114 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30608 event pairs, 645 based on Foata normal form. 16/5035 useless extension candidates. Maximal degree in co-relation 41378. Up to 4473 conditions per place. [2024-06-20 17:04:23,556 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 276 selfloop transitions, 86 changer transitions 0/367 dead transitions. [2024-06-20 17:04:23,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 367 transitions, 5298 flow [2024-06-20 17:04:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:04:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:04:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-20 17:04:23,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-20 17:04:23,557 INFO L175 Difference]: Start difference. First operand has 256 places, 328 transitions, 4370 flow. Second operand 11 states and 208 transitions. [2024-06-20 17:04:23,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 367 transitions, 5298 flow [2024-06-20 17:04:24,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 367 transitions, 5021 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 17:04:24,116 INFO L231 Difference]: Finished difference. Result has 258 places, 329 transitions, 4323 flow [2024-06-20 17:04:24,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4323, PETRI_PLACES=258, PETRI_TRANSITIONS=329} [2024-06-20 17:04:24,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 17:04:24,116 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 329 transitions, 4323 flow [2024-06-20 17:04:24,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:24,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:24,117 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 17:04:24,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:04:24,117 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:24,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1304245298, now seen corresponding path program 11 times [2024-06-20 17:04:24,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:24,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619783419] [2024-06-20 17:04:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:25,242 INFO 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 17:04:25,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:25,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619783419] [2024-06-20 17:04:25,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619783419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:25,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:25,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:25,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671517739] [2024-06-20 17:04:25,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:25,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:25,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:25,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 329 transitions, 4323 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:25,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:25,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:25,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:26,454 INFO L124 PetriNetUnfolderBase]: 3085/4981 cut-off events. [2024-06-20 17:04:26,454 INFO L125 PetriNetUnfolderBase]: For 316569/316569 co-relation queries the response was YES. [2024-06-20 17:04:26,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40158 conditions, 4981 events. 3085/4981 cut-off events. For 316569/316569 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30285 event pairs, 629 based on Foata normal form. 16/4991 useless extension candidates. Maximal degree in co-relation 40038. Up to 4446 conditions per place. [2024-06-20 17:04:26,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 281 selfloop transitions, 77 changer transitions 0/363 dead transitions. [2024-06-20 17:04:26,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 363 transitions, 5185 flow [2024-06-20 17:04:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:04:26,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:04:26,515 INFO L175 Difference]: Start difference. First operand has 258 places, 329 transitions, 4323 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:04:26,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 363 transitions, 5185 flow [2024-06-20 17:04:27,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 363 transitions, 4989 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 17:04:27,026 INFO L231 Difference]: Finished difference. Result has 259 places, 329 transitions, 4290 flow [2024-06-20 17:04:27,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4290, PETRI_PLACES=259, PETRI_TRANSITIONS=329} [2024-06-20 17:04:27,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-20 17:04:27,027 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 329 transitions, 4290 flow [2024-06-20 17:04:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:27,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:27,027 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 17:04:27,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:04:27,027 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 17:04:27,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1326018610, now seen corresponding path program 1 times [2024-06-20 17:04:27,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:27,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173021818] [2024-06-20 17:04:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:27,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:27,830 INFO 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 17:04:27,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173021818] [2024-06-20 17:04:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173021818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:27,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038188535] [2024-06-20 17:04:27,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:27,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:27,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:27,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:27,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 329 transitions, 4290 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 17:04:27,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:27,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:27,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:28,832 INFO L124 PetriNetUnfolderBase]: 3090/4989 cut-off events. [2024-06-20 17:04:28,832 INFO L125 PetriNetUnfolderBase]: For 302385/302385 co-relation queries the response was YES. [2024-06-20 17:04:28,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40140 conditions, 4989 events. 3090/4989 cut-off events. For 302385/302385 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30364 event pairs, 654 based on Foata normal form. 1/4988 useless extension candidates. Maximal degree in co-relation 40019. Up to 4744 conditions per place. [2024-06-20 17:04:28,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 314 selfloop transitions, 36 changer transitions 0/355 dead transitions. [2024-06-20 17:04:28,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 355 transitions, 5290 flow [2024-06-20 17:04:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:04:28,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 17:04:28,891 INFO L175 Difference]: Start difference. First operand has 259 places, 329 transitions, 4290 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:04:28,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 355 transitions, 5290 flow [2024-06-20 17:04:29,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 355 transitions, 5089 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 17:04:29,487 INFO L231 Difference]: Finished difference. Result has 256 places, 335 transitions, 4301 flow [2024-06-20 17:04:29,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4301, PETRI_PLACES=256, PETRI_TRANSITIONS=335} [2024-06-20 17:04:29,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-20 17:04:29,487 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 335 transitions, 4301 flow [2024-06-20 17:04:29,487 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 17:04:29,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:29,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:29,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:04:29,488 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 17:04:29,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1968569607, now seen corresponding path program 1 times [2024-06-20 17:04:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:29,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510226945] [2024-06-20 17:04:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:29,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510226945] [2024-06-20 17:04:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510226945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:30,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:30,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:30,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979680402] [2024-06-20 17:04:30,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:30,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:30,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:30,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 335 transitions, 4301 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 17:04:30,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:30,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:30,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:31,269 INFO L124 PetriNetUnfolderBase]: 3216/5171 cut-off events. [2024-06-20 17:04:31,270 INFO L125 PetriNetUnfolderBase]: For 341925/341925 co-relation queries the response was YES. [2024-06-20 17:04:31,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42898 conditions, 5171 events. 3216/5171 cut-off events. For 341925/341925 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31595 event pairs, 629 based on Foata normal form. 6/5171 useless extension candidates. Maximal degree in co-relation 42778. Up to 4342 conditions per place. [2024-06-20 17:04:31,329 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 256 selfloop transitions, 113 changer transitions 0/374 dead transitions. [2024-06-20 17:04:31,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 374 transitions, 5785 flow [2024-06-20 17:04:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 17:04:31,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-20 17:04:31,330 INFO L175 Difference]: Start difference. First operand has 256 places, 335 transitions, 4301 flow. Second operand 8 states and 161 transitions. [2024-06-20 17:04:31,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 374 transitions, 5785 flow [2024-06-20 17:04:31,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 5686 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:31,890 INFO L231 Difference]: Finished difference. Result has 261 places, 346 transitions, 4746 flow [2024-06-20 17:04:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4746, PETRI_PLACES=261, PETRI_TRANSITIONS=346} [2024-06-20 17:04:31,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-20 17:04:31,890 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 346 transitions, 4746 flow [2024-06-20 17:04:31,891 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 17:04:31,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:31,891 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 17:04:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:04:31,891 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 17:04:31,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1968569452, now seen corresponding path program 2 times [2024-06-20 17:04:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118986534] [2024-06-20 17:04:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:32,831 INFO 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 17:04:32,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118986534] [2024-06-20 17:04:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118986534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:32,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:32,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:32,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540430327] [2024-06-20 17:04:32,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:32,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:32,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:32,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:32,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:32,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:32,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 346 transitions, 4746 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 17:04:32,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:32,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:32,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:33,944 INFO L124 PetriNetUnfolderBase]: 3221/5179 cut-off events. [2024-06-20 17:04:33,945 INFO L125 PetriNetUnfolderBase]: For 350954/350954 co-relation queries the response was YES. [2024-06-20 17:04:33,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44153 conditions, 5179 events. 3221/5179 cut-off events. For 350954/350954 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31639 event pairs, 669 based on Foata normal form. 1/5178 useless extension candidates. Maximal degree in co-relation 44030. Up to 4943 conditions per place. [2024-06-20 17:04:34,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 31 changer transitions 0/365 dead transitions. [2024-06-20 17:04:34,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 365 transitions, 5574 flow [2024-06-20 17:04:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:04:34,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 17:04:34,008 INFO L175 Difference]: Start difference. First operand has 261 places, 346 transitions, 4746 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:04:34,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 365 transitions, 5574 flow [2024-06-20 17:04:34,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 365 transitions, 5393 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 17:04:34,653 INFO L231 Difference]: Finished difference. Result has 266 places, 349 transitions, 4701 flow [2024-06-20 17:04:34,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4701, PETRI_PLACES=266, PETRI_TRANSITIONS=349} [2024-06-20 17:04:34,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-20 17:04:34,654 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 349 transitions, 4701 flow [2024-06-20 17:04:34,654 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 17:04:34,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:34,654 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 17:04:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:04:34,654 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 17:04:34,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1972294257, now seen corresponding path program 2 times [2024-06-20 17:04:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:34,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208253884] [2024-06-20 17:04:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:35,374 INFO 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 17:04:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208253884] [2024-06-20 17:04:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208253884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:35,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:35,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:35,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80766398] [2024-06-20 17:04:35,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:35,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:35,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:35,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:35,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:35,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 349 transitions, 4701 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 17:04:35,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:35,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:35,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:36,835 INFO L124 PetriNetUnfolderBase]: 3347/5368 cut-off events. [2024-06-20 17:04:36,836 INFO L125 PetriNetUnfolderBase]: For 391044/391044 co-relation queries the response was YES. [2024-06-20 17:04:36,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 5368 events. 3347/5368 cut-off events. For 391044/391044 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32939 event pairs, 635 based on Foata normal form. 6/5368 useless extension candidates. Maximal degree in co-relation 46342. Up to 4753 conditions per place. [2024-06-20 17:04:36,927 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 298 selfloop transitions, 88 changer transitions 0/391 dead transitions. [2024-06-20 17:04:36,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 391 transitions, 6245 flow [2024-06-20 17:04:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 17:04:36,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-20 17:04:36,929 INFO L175 Difference]: Start difference. First operand has 266 places, 349 transitions, 4701 flow. Second operand 10 states and 191 transitions. [2024-06-20 17:04:36,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 391 transitions, 6245 flow [2024-06-20 17:04:37,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 391 transitions, 6137 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:37,662 INFO L231 Difference]: Finished difference. Result has 271 places, 361 transitions, 5087 flow [2024-06-20 17:04:37,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5087, PETRI_PLACES=271, PETRI_TRANSITIONS=361} [2024-06-20 17:04:37,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 17:04:37,663 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 361 transitions, 5087 flow [2024-06-20 17:04:37,663 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 17:04:37,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:37,663 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 17:04:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:04:37,664 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 17:04:37,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1972288677, now seen corresponding path program 3 times [2024-06-20 17:04:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:37,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943143748] [2024-06-20 17:04:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:37,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:38,387 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 17:04:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943143748] [2024-06-20 17:04:38,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943143748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:38,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497128238] [2024-06-20 17:04:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:38,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:38,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 361 transitions, 5087 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 17:04:38,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:38,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:38,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:39,665 INFO L124 PetriNetUnfolderBase]: 3337/5356 cut-off events. [2024-06-20 17:04:39,666 INFO L125 PetriNetUnfolderBase]: For 393123/393123 co-relation queries the response was YES. [2024-06-20 17:04:39,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46686 conditions, 5356 events. 3337/5356 cut-off events. For 393123/393123 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32877 event pairs, 635 based on Foata normal form. 6/5356 useless extension candidates. Maximal degree in co-relation 46559. Up to 4750 conditions per place. [2024-06-20 17:04:39,726 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 299 selfloop transitions, 81 changer transitions 0/385 dead transitions. [2024-06-20 17:04:39,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 385 transitions, 6161 flow [2024-06-20 17:04:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:04:39,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:04:39,727 INFO L175 Difference]: Start difference. First operand has 271 places, 361 transitions, 5087 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:04:39,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 385 transitions, 6161 flow [2024-06-20 17:04:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 385 transitions, 5860 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:40,427 INFO L231 Difference]: Finished difference. Result has 273 places, 361 transitions, 4956 flow [2024-06-20 17:04:40,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4786, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4956, PETRI_PLACES=273, PETRI_TRANSITIONS=361} [2024-06-20 17:04:40,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-20 17:04:40,430 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 361 transitions, 4956 flow [2024-06-20 17:04:40,430 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 17:04:40,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:40,430 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 17:04:40,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:04:40,431 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 17:04:40,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1972288522, now seen corresponding path program 3 times [2024-06-20 17:04:40,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:40,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726600164] [2024-06-20 17:04:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:40,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:41,267 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 17:04:41,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:41,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726600164] [2024-06-20 17:04:41,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726600164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:41,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:41,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:41,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61974046] [2024-06-20 17:04:41,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:41,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:41,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:41,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 361 transitions, 4956 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 17:04:41,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:41,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:42,508 INFO L124 PetriNetUnfolderBase]: 3342/5364 cut-off events. [2024-06-20 17:04:42,509 INFO L125 PetriNetUnfolderBase]: For 390668/390668 co-relation queries the response was YES. [2024-06-20 17:04:42,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46384 conditions, 5364 events. 3342/5364 cut-off events. For 390668/390668 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32971 event pairs, 687 based on Foata normal form. 1/5363 useless extension candidates. Maximal degree in co-relation 46256. Up to 5127 conditions per place. [2024-06-20 17:04:42,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 23 changer transitions 0/377 dead transitions. [2024-06-20 17:04:42,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 377 transitions, 5804 flow [2024-06-20 17:04:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:04:42,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:04:42,570 INFO L175 Difference]: Start difference. First operand has 273 places, 361 transitions, 4956 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:04:42,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 377 transitions, 5804 flow [2024-06-20 17:04:43,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 377 transitions, 5642 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:43,289 INFO L231 Difference]: Finished difference. Result has 274 places, 364 transitions, 4920 flow [2024-06-20 17:04:43,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4920, PETRI_PLACES=274, PETRI_TRANSITIONS=364} [2024-06-20 17:04:43,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-20 17:04:43,289 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 364 transitions, 4920 flow [2024-06-20 17:04:43,289 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 17:04:43,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:43,290 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 17:04:43,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:04:43,290 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 17:04:43,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash -75429766, now seen corresponding path program 4 times [2024-06-20 17:04:43,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:43,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085185013] [2024-06-20 17:04:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:44,079 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 17:04:44,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:44,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085185013] [2024-06-20 17:04:44,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085185013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:44,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:44,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3385334] [2024-06-20 17:04:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:44,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:44,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:44,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:44,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 364 transitions, 4920 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 17:04:44,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:44,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:44,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:45,323 INFO L124 PetriNetUnfolderBase]: 3339/5356 cut-off events. [2024-06-20 17:04:45,324 INFO L125 PetriNetUnfolderBase]: For 396583/396583 co-relation queries the response was YES. [2024-06-20 17:04:45,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46130 conditions, 5356 events. 3339/5356 cut-off events. For 396583/396583 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32909 event pairs, 689 based on Foata normal form. 1/5355 useless extension candidates. Maximal degree in co-relation 46001. Up to 5108 conditions per place. [2024-06-20 17:04:45,385 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 26 changer transitions 0/382 dead transitions. [2024-06-20 17:04:45,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 382 transitions, 5728 flow [2024-06-20 17:04:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 17:04:45,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-20 17:04:45,386 INFO L175 Difference]: Start difference. First operand has 274 places, 364 transitions, 4920 flow. Second operand 7 states and 132 transitions. [2024-06-20 17:04:45,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 382 transitions, 5728 flow [2024-06-20 17:04:46,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 382 transitions, 5584 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:46,137 INFO L231 Difference]: Finished difference. Result has 275 places, 364 transitions, 4838 flow [2024-06-20 17:04:46,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4838, PETRI_PLACES=275, PETRI_TRANSITIONS=364} [2024-06-20 17:04:46,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-20 17:04:46,137 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 364 transitions, 4838 flow [2024-06-20 17:04:46,137 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 17:04:46,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:46,137 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 17:04:46,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:04:46,138 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 17:04:46,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash -397058517, now seen corresponding path program 4 times [2024-06-20 17:04:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948783059] [2024-06-20 17:04:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:46,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948783059] [2024-06-20 17:04:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948783059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:46,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378024735] [2024-06-20 17:04:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:46,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:46,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:46,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 364 transitions, 4838 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 17:04:46,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:46,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:46,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:48,084 INFO L124 PetriNetUnfolderBase]: 3417/5467 cut-off events. [2024-06-20 17:04:48,084 INFO L125 PetriNetUnfolderBase]: For 431521/431521 co-relation queries the response was YES. [2024-06-20 17:04:48,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47803 conditions, 5467 events. 3417/5467 cut-off events. For 431521/431521 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33530 event pairs, 665 based on Foata normal form. 6/5467 useless extension candidates. Maximal degree in co-relation 47673. Up to 4767 conditions per place. [2024-06-20 17:04:48,153 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 291 selfloop transitions, 100 changer transitions 0/396 dead transitions. [2024-06-20 17:04:48,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 396 transitions, 6290 flow [2024-06-20 17:04:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 17:04:48,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:04:48,154 INFO L175 Difference]: Start difference. First operand has 275 places, 364 transitions, 4838 flow. Second operand 7 states and 140 transitions. [2024-06-20 17:04:48,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 396 transitions, 6290 flow [2024-06-20 17:04:48,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 396 transitions, 6218 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:48,928 INFO L231 Difference]: Finished difference. Result has 278 places, 373 transitions, 5307 flow [2024-06-20 17:04:48,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5307, PETRI_PLACES=278, PETRI_TRANSITIONS=373} [2024-06-20 17:04:48,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 17:04:48,929 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 373 transitions, 5307 flow [2024-06-20 17:04:48,929 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 17:04:48,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:48,929 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 17:04:48,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:04:48,929 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 17:04:48,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash -324780281, now seen corresponding path program 5 times [2024-06-20 17:04:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:48,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741284602] [2024-06-20 17:04:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:48,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741284602] [2024-06-20 17:04:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741284602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:49,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:49,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854354393] [2024-06-20 17:04:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:49,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:49,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 373 transitions, 5307 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 17:04:49,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:49,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:49,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:50,854 INFO L124 PetriNetUnfolderBase]: 3407/5451 cut-off events. [2024-06-20 17:04:50,854 INFO L125 PetriNetUnfolderBase]: For 434657/434657 co-relation queries the response was YES. [2024-06-20 17:04:50,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48348 conditions, 5451 events. 3407/5451 cut-off events. For 434657/434657 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33443 event pairs, 651 based on Foata normal form. 6/5451 useless extension candidates. Maximal degree in co-relation 48215. Up to 4764 conditions per place. [2024-06-20 17:04:50,927 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 285 selfloop transitions, 108 changer transitions 0/398 dead transitions. [2024-06-20 17:04:50,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 6417 flow [2024-06-20 17:04:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 17:04:50,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-20 17:04:50,929 INFO L175 Difference]: Start difference. First operand has 278 places, 373 transitions, 5307 flow. Second operand 7 states and 142 transitions. [2024-06-20 17:04:50,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 6417 flow [2024-06-20 17:04:51,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 398 transitions, 6119 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:51,850 INFO L231 Difference]: Finished difference. Result has 280 places, 373 transitions, 5233 flow [2024-06-20 17:04:51,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5233, PETRI_PLACES=280, PETRI_TRANSITIONS=373} [2024-06-20 17:04:51,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 17:04:51,851 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 373 transitions, 5233 flow [2024-06-20 17:04:51,851 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 17:04:51,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:51,851 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 17:04:51,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:04:51,851 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 17:04:51,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:51,851 INFO L85 PathProgramCache]: Analyzing trace with hash -324572891, now seen corresponding path program 6 times [2024-06-20 17:04:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:51,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652588620] [2024-06-20 17:04:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:52,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652588620] [2024-06-20 17:04:52,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652588620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:52,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:52,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589290080] [2024-06-20 17:04:52,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:52,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:52,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:52,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 373 transitions, 5233 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 17:04:52,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:52,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:52,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:53,669 INFO L124 PetriNetUnfolderBase]: 3421/5479 cut-off events. [2024-06-20 17:04:53,669 INFO L125 PetriNetUnfolderBase]: For 439669/439669 co-relation queries the response was YES. [2024-06-20 17:04:53,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48093 conditions, 5479 events. 3421/5479 cut-off events. For 439669/439669 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33641 event pairs, 670 based on Foata normal form. 6/5479 useless extension candidates. Maximal degree in co-relation 47961. Up to 5172 conditions per place. [2024-06-20 17:04:53,740 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 357 selfloop transitions, 28 changer transitions 0/390 dead transitions. [2024-06-20 17:04:53,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 390 transitions, 6211 flow [2024-06-20 17:04:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:04:53,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 17:04:53,741 INFO L175 Difference]: Start difference. First operand has 280 places, 373 transitions, 5233 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:04:53,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 390 transitions, 6211 flow [2024-06-20 17:04:54,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 390 transitions, 5971 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:54,656 INFO L231 Difference]: Finished difference. Result has 282 places, 377 transitions, 5180 flow [2024-06-20 17:04:54,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5180, PETRI_PLACES=282, PETRI_TRANSITIONS=377} [2024-06-20 17:04:54,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 17:04:54,656 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 377 transitions, 5180 flow [2024-06-20 17:04:54,657 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 17:04:54,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:54,657 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 17:04:54,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:04:54,657 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 17:04:54,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash -396849050, now seen corresponding path program 1 times [2024-06-20 17:04:54,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:54,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044454889] [2024-06-20 17:04:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:54,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:55,396 INFO 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 17:04:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044454889] [2024-06-20 17:04:55,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044454889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:55,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:55,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:55,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943775885] [2024-06-20 17:04:55,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:55,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:55,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 377 transitions, 5180 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 17:04:55,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:55,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:55,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:56,572 INFO L124 PetriNetUnfolderBase]: 3438/5491 cut-off events. [2024-06-20 17:04:56,573 INFO L125 PetriNetUnfolderBase]: For 446612/446612 co-relation queries the response was YES. [2024-06-20 17:04:56,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48110 conditions, 5491 events. 3438/5491 cut-off events. For 446612/446612 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33686 event pairs, 671 based on Foata normal form. 5/5487 useless extension candidates. Maximal degree in co-relation 47977. Up to 5149 conditions per place. [2024-06-20 17:04:56,645 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 39 changer transitions 0/396 dead transitions. [2024-06-20 17:04:56,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 396 transitions, 6201 flow [2024-06-20 17:04:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:04:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:04:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 17:04:56,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 17:04:56,646 INFO L175 Difference]: Start difference. First operand has 282 places, 377 transitions, 5180 flow. Second operand 6 states and 116 transitions. [2024-06-20 17:04:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 396 transitions, 6201 flow [2024-06-20 17:04:57,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 396 transitions, 6066 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:57,507 INFO L231 Difference]: Finished difference. Result has 283 places, 384 transitions, 5310 flow [2024-06-20 17:04:57,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5310, PETRI_PLACES=283, PETRI_TRANSITIONS=384} [2024-06-20 17:04:57,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-20 17:04:57,508 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 384 transitions, 5310 flow [2024-06-20 17:04:57,508 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 17:04:57,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:57,508 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 17:04:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:04:57,508 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:57,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1332023640, now seen corresponding path program 1 times [2024-06-20 17:04:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686532849] [2024-06-20 17:04:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:57,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686532849] [2024-06-20 17:04:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686532849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:58,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:04:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821734394] [2024-06-20 17:04:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:58,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:04:58,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:04:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:04:58,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:04:58,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 384 transitions, 5310 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:58,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:58,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:04:58,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:00,105 INFO L124 PetriNetUnfolderBase]: 3479/5579 cut-off events. [2024-06-20 17:05:00,105 INFO L125 PetriNetUnfolderBase]: For 469663/469663 co-relation queries the response was YES. [2024-06-20 17:05:00,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 5579 events. 3479/5579 cut-off events. For 469663/469663 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34477 event pairs, 648 based on Foata normal form. 12/5589 useless extension candidates. Maximal degree in co-relation 48964. Up to 5051 conditions per place. [2024-06-20 17:05:00,177 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 60 changer transitions 0/422 dead transitions. [2024-06-20 17:05:00,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 422 transitions, 6324 flow [2024-06-20 17:05:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:05:00,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:05:00,178 INFO L175 Difference]: Start difference. First operand has 283 places, 384 transitions, 5310 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:05:00,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 422 transitions, 6324 flow [2024-06-20 17:05:00,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 422 transitions, 6149 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:00,939 INFO L231 Difference]: Finished difference. Result has 288 places, 385 transitions, 5319 flow [2024-06-20 17:05:00,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5135, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5319, PETRI_PLACES=288, PETRI_TRANSITIONS=385} [2024-06-20 17:05:00,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 17:05:00,939 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 385 transitions, 5319 flow [2024-06-20 17:05:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:00,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:00,940 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 17:05:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:05:00,940 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:00,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash 76624782, now seen corresponding path program 2 times [2024-06-20 17:05:00,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:00,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018876787] [2024-06-20 17:05:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:02,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:02,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018876787] [2024-06-20 17:05:02,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018876787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:02,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:02,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:05:02,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527324186] [2024-06-20 17:05:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:02,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:05:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:05:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:05:02,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:02,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 385 transitions, 5319 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:02,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:02,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:02,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:03,373 INFO L124 PetriNetUnfolderBase]: 3520/5660 cut-off events. [2024-06-20 17:05:03,373 INFO L125 PetriNetUnfolderBase]: For 478180/478180 co-relation queries the response was YES. [2024-06-20 17:05:03,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49641 conditions, 5660 events. 3520/5660 cut-off events. For 478180/478180 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35084 event pairs, 655 based on Foata normal form. 12/5670 useless extension candidates. Maximal degree in co-relation 49507. Up to 5238 conditions per place. [2024-06-20 17:05:03,445 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 26 changer transitions 0/427 dead transitions. [2024-06-20 17:05:03,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 427 transitions, 6357 flow [2024-06-20 17:05:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:05:03,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:05:03,446 INFO L175 Difference]: Start difference. First operand has 288 places, 385 transitions, 5319 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:05:03,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 427 transitions, 6357 flow [2024-06-20 17:05:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 427 transitions, 6201 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 17:05:04,234 INFO L231 Difference]: Finished difference. Result has 290 places, 386 transitions, 5281 flow [2024-06-20 17:05:04,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5281, PETRI_PLACES=290, PETRI_TRANSITIONS=386} [2024-06-20 17:05:04,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 17:05:04,235 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 386 transitions, 5281 flow [2024-06-20 17:05:04,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:04,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:04,235 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 17:05:04,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:05:04,236 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:04,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 190128492, now seen corresponding path program 3 times [2024-06-20 17:05:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:04,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619933484] [2024-06-20 17:05:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:05,304 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 17:05:05,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:05,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619933484] [2024-06-20 17:05:05,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619933484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:05,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:05,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:05:05,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437773068] [2024-06-20 17:05:05,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:05,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:05:05,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:05:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:05:05,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:05,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 386 transitions, 5281 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:05,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:05,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:05,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:06,806 INFO L124 PetriNetUnfolderBase]: 3561/5731 cut-off events. [2024-06-20 17:05:06,806 INFO L125 PetriNetUnfolderBase]: For 490952/490952 co-relation queries the response was YES. [2024-06-20 17:05:06,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50086 conditions, 5731 events. 3561/5731 cut-off events. For 490952/490952 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35804 event pairs, 684 based on Foata normal form. 12/5741 useless extension candidates. Maximal degree in co-relation 49951. Up to 5308 conditions per place. [2024-06-20 17:05:06,877 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 31 changer transitions 0/427 dead transitions. [2024-06-20 17:05:06,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 427 transitions, 6319 flow [2024-06-20 17:05:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:05:06,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:05:06,878 INFO L175 Difference]: Start difference. First operand has 290 places, 386 transitions, 5281 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:05:06,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 427 transitions, 6319 flow [2024-06-20 17:05:07,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 427 transitions, 6229 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 17:05:07,732 INFO L231 Difference]: Finished difference. Result has 292 places, 387 transitions, 5321 flow [2024-06-20 17:05:07,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5321, PETRI_PLACES=292, PETRI_TRANSITIONS=387} [2024-06-20 17:05:07,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-20 17:05:07,732 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 387 transitions, 5321 flow [2024-06-20 17:05:07,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:07,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:07,733 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 17:05:07,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:05:07,733 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 17:05:07,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash 749300997, now seen corresponding path program 1 times [2024-06-20 17:05:07,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:07,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84708976] [2024-06-20 17:05:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:08,397 INFO 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 17:05:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84708976] [2024-06-20 17:05:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84708976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:08,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:08,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:08,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995772594] [2024-06-20 17:05:08,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:08,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:08,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:08,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:08,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 387 transitions, 5321 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 17:05:08,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:08,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:08,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:09,787 INFO L124 PetriNetUnfolderBase]: 3635/5833 cut-off events. [2024-06-20 17:05:09,788 INFO L125 PetriNetUnfolderBase]: For 507020/507020 co-relation queries the response was YES. [2024-06-20 17:05:09,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51952 conditions, 5833 events. 3635/5833 cut-off events. For 507020/507020 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36457 event pairs, 711 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 51816. Up to 5336 conditions per place. [2024-06-20 17:05:09,853 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 341 selfloop transitions, 77 changer transitions 0/423 dead transitions. [2024-06-20 17:05:09,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 423 transitions, 6728 flow [2024-06-20 17:05:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 17:05:09,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:05:09,854 INFO L175 Difference]: Start difference. First operand has 292 places, 387 transitions, 5321 flow. Second operand 8 states and 160 transitions. [2024-06-20 17:05:09,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 423 transitions, 6728 flow [2024-06-20 17:05:10,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 423 transitions, 6626 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 17:05:10,826 INFO L231 Difference]: Finished difference. Result has 293 places, 397 transitions, 5747 flow [2024-06-20 17:05:10,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5219, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5747, PETRI_PLACES=293, PETRI_TRANSITIONS=397} [2024-06-20 17:05:10,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-20 17:05:10,827 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 397 transitions, 5747 flow [2024-06-20 17:05:10,827 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 17:05:10,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:10,827 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 17:05:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:05:10,827 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 17:05:10,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -398118589, now seen corresponding path program 2 times [2024-06-20 17:05:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318965895] [2024-06-20 17:05:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318965895] [2024-06-20 17:05:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318965895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:11,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:11,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:11,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416566401] [2024-06-20 17:05:11,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:11,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:11,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:11,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:11,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 397 transitions, 5747 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 17:05:11,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:11,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:11,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:13,009 INFO L124 PetriNetUnfolderBase]: 3629/5825 cut-off events. [2024-06-20 17:05:13,009 INFO L125 PetriNetUnfolderBase]: For 511800/511800 co-relation queries the response was YES. [2024-06-20 17:05:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52028 conditions, 5825 events. 3629/5825 cut-off events. For 511800/511800 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36389 event pairs, 713 based on Foata normal form. 2/5825 useless extension candidates. Maximal degree in co-relation 51890. Up to 5461 conditions per place. [2024-06-20 17:05:13,211 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 361 selfloop transitions, 52 changer transitions 0/418 dead transitions. [2024-06-20 17:05:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 418 transitions, 6668 flow [2024-06-20 17:05:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:05:13,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 17:05:13,212 INFO L175 Difference]: Start difference. First operand has 293 places, 397 transitions, 5747 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:05:13,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 418 transitions, 6668 flow [2024-06-20 17:05:14,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 418 transitions, 6487 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:14,146 INFO L231 Difference]: Finished difference. Result has 296 places, 397 transitions, 5677 flow [2024-06-20 17:05:14,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5677, PETRI_PLACES=296, PETRI_TRANSITIONS=397} [2024-06-20 17:05:14,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-20 17:05:14,147 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 397 transitions, 5677 flow [2024-06-20 17:05:14,147 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 17:05:14,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:14,147 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 17:05:14,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:05:14,147 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 17:05:14,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash -220987069, now seen corresponding path program 3 times [2024-06-20 17:05:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:14,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86637471] [2024-06-20 17:05:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:14,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86637471] [2024-06-20 17:05:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86637471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:14,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:14,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:14,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415019892] [2024-06-20 17:05:14,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:14,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:14,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:14,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:14,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:14,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 397 transitions, 5677 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 17:05:14,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:14,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:14,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:16,140 INFO L124 PetriNetUnfolderBase]: 3654/5858 cut-off events. [2024-06-20 17:05:16,140 INFO L125 PetriNetUnfolderBase]: For 522513/522513 co-relation queries the response was YES. [2024-06-20 17:05:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52376 conditions, 5858 events. 3654/5858 cut-off events. For 522513/522513 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36566 event pairs, 720 based on Foata normal form. 2/5858 useless extension candidates. Maximal degree in co-relation 52237. Up to 5569 conditions per place. [2024-06-20 17:05:16,221 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 384 selfloop transitions, 36 changer transitions 0/425 dead transitions. [2024-06-20 17:05:16,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 425 transitions, 6832 flow [2024-06-20 17:05:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:05:16,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 17:05:16,222 INFO L175 Difference]: Start difference. First operand has 296 places, 397 transitions, 5677 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:05:16,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 425 transitions, 6832 flow [2024-06-20 17:05:17,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 425 transitions, 6698 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:17,417 INFO L231 Difference]: Finished difference. Result has 301 places, 408 transitions, 5886 flow [2024-06-20 17:05:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5553, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5886, PETRI_PLACES=301, PETRI_TRANSITIONS=408} [2024-06-20 17:05:17,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 17:05:17,417 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 408 transitions, 5886 flow [2024-06-20 17:05:17,417 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 17:05:17,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:05:17,418 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:17,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash 199861134, now seen corresponding path program 4 times [2024-06-20 17:05:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301580142] [2024-06-20 17:05:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:18,759 INFO 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 17:05:18,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:18,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301580142] [2024-06-20 17:05:18,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301580142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:18,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:18,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:05:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825595256] [2024-06-20 17:05:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:18,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:05:18,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:05:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:05:18,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:18,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 408 transitions, 5886 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:18,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:18,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:18,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:20,429 INFO L124 PetriNetUnfolderBase]: 3634/5819 cut-off events. [2024-06-20 17:05:20,429 INFO L125 PetriNetUnfolderBase]: For 528754/528754 co-relation queries the response was YES. [2024-06-20 17:05:20,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51455 conditions, 5819 events. 3634/5819 cut-off events. For 528754/528754 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 36317 event pairs, 699 based on Foata normal form. 12/5822 useless extension candidates. Maximal degree in co-relation 51314. Up to 5250 conditions per place. [2024-06-20 17:05:20,506 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 85 changer transitions 0/443 dead transitions. [2024-06-20 17:05:20,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 443 transitions, 6882 flow [2024-06-20 17:05:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:05:20,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:05:20,508 INFO L175 Difference]: Start difference. First operand has 301 places, 408 transitions, 5886 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:05:20,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 443 transitions, 6882 flow [2024-06-20 17:05:21,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 443 transitions, 6723 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:21,554 INFO L231 Difference]: Finished difference. Result has 307 places, 408 transitions, 5903 flow [2024-06-20 17:05:21,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5903, PETRI_PLACES=307, PETRI_TRANSITIONS=408} [2024-06-20 17:05:21,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:05:21,555 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 408 transitions, 5903 flow [2024-06-20 17:05:21,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:21,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:21,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:05:21,555 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:21,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1946982440, now seen corresponding path program 5 times [2024-06-20 17:05:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:21,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529156075] [2024-06-20 17:05:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:22,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:22,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529156075] [2024-06-20 17:05:22,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529156075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:22,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:22,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:05:22,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125189763] [2024-06-20 17:05:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:05:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:05:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:05:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:22,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 408 transitions, 5903 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:22,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:22,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:22,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:24,251 INFO L124 PetriNetUnfolderBase]: 3614/5791 cut-off events. [2024-06-20 17:05:24,251 INFO L125 PetriNetUnfolderBase]: For 515802/515802 co-relation queries the response was YES. [2024-06-20 17:05:24,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50578 conditions, 5791 events. 3614/5791 cut-off events. For 515802/515802 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36044 event pairs, 667 based on Foata normal form. 12/5797 useless extension candidates. Maximal degree in co-relation 50436. Up to 5183 conditions per place. [2024-06-20 17:05:24,331 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 82 changer transitions 0/442 dead transitions. [2024-06-20 17:05:24,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 442 transitions, 6785 flow [2024-06-20 17:05:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:05:24,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:05:24,333 INFO L175 Difference]: Start difference. First operand has 307 places, 408 transitions, 5903 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:05:24,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 442 transitions, 6785 flow [2024-06-20 17:05:25,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 442 transitions, 6585 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:05:25,352 INFO L231 Difference]: Finished difference. Result has 307 places, 407 transitions, 5761 flow [2024-06-20 17:05:25,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5761, PETRI_PLACES=307, PETRI_TRANSITIONS=407} [2024-06-20 17:05:25,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:05:25,352 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 407 transitions, 5761 flow [2024-06-20 17:05:25,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:25,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:25,353 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 17:05:25,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:05:25,353 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 17:05:25,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash 661130575, now seen corresponding path program 4 times [2024-06-20 17:05:25,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:25,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225418175] [2024-06-20 17:05:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:25,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:26,069 INFO 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 17:05:26,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:26,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225418175] [2024-06-20 17:05:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225418175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:26,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:26,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:26,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605018335] [2024-06-20 17:05:26,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:26,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:26,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:26,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 407 transitions, 5761 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 17:05:26,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:26,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:26,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:27,443 INFO L124 PetriNetUnfolderBase]: 3736/5975 cut-off events. [2024-06-20 17:05:27,443 INFO L125 PetriNetUnfolderBase]: For 554263/554263 co-relation queries the response was YES. [2024-06-20 17:05:27,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53879 conditions, 5975 events. 3736/5975 cut-off events. For 554263/554263 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 37289 event pairs, 649 based on Foata normal form. 2/5971 useless extension candidates. Maximal degree in co-relation 53736. Up to 4811 conditions per place. [2024-06-20 17:05:27,524 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 291 selfloop transitions, 153 changer transitions 0/449 dead transitions. [2024-06-20 17:05:27,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 449 transitions, 7558 flow [2024-06-20 17:05:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 17:05:27,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-20 17:05:27,526 INFO L175 Difference]: Start difference. First operand has 307 places, 407 transitions, 5761 flow. Second operand 8 states and 161 transitions. [2024-06-20 17:05:27,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 449 transitions, 7558 flow [2024-06-20 17:05:28,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 449 transitions, 7262 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:28,451 INFO L231 Difference]: Finished difference. Result has 306 places, 421 transitions, 6236 flow [2024-06-20 17:05:28,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6236, PETRI_PLACES=306, PETRI_TRANSITIONS=421} [2024-06-20 17:05:28,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 17:05:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 421 transitions, 6236 flow [2024-06-20 17:05:28,452 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 17:05:28,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:28,452 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 17:05:28,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:05:28,452 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 17:05:28,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 896102335, now seen corresponding path program 5 times [2024-06-20 17:05:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:28,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343964432] [2024-06-20 17:05:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:29,168 INFO 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 17:05:29,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:29,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343964432] [2024-06-20 17:05:29,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343964432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:29,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:29,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876124602] [2024-06-20 17:05:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:29,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:29,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:29,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:29,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 421 transitions, 6236 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 17:05:29,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:29,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:29,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:30,453 INFO L124 PetriNetUnfolderBase]: 3718/5945 cut-off events. [2024-06-20 17:05:30,453 INFO L125 PetriNetUnfolderBase]: For 558123/558123 co-relation queries the response was YES. [2024-06-20 17:05:30,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53291 conditions, 5945 events. 3718/5945 cut-off events. For 558123/558123 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37109 event pairs, 657 based on Foata normal form. 6/5945 useless extension candidates. Maximal degree in co-relation 53148. Up to 4800 conditions per place. [2024-06-20 17:05:30,534 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 287 selfloop transitions, 155 changer transitions 0/447 dead transitions. [2024-06-20 17:05:30,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 447 transitions, 7610 flow [2024-06-20 17:05:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 17:05:30,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:05:30,535 INFO L175 Difference]: Start difference. First operand has 306 places, 421 transitions, 6236 flow. Second operand 8 states and 160 transitions. [2024-06-20 17:05:30,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 447 transitions, 7610 flow [2024-06-20 17:05:31,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 447 transitions, 7325 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:31,697 INFO L231 Difference]: Finished difference. Result has 310 places, 421 transitions, 6269 flow [2024-06-20 17:05:31,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5951, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6269, PETRI_PLACES=310, PETRI_TRANSITIONS=421} [2024-06-20 17:05:31,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-20 17:05:31,698 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 421 transitions, 6269 flow [2024-06-20 17:05:31,698 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 17:05:31,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:31,698 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 17:05:31,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:05:31,698 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 17:05:31,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash -775697945, now seen corresponding path program 6 times [2024-06-20 17:05:31,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:31,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201063489] [2024-06-20 17:05:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:31,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:32,397 INFO 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 17:05:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201063489] [2024-06-20 17:05:32,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201063489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:32,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:32,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:32,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356470995] [2024-06-20 17:05:32,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:32,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:32,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:32,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:32,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 421 transitions, 6269 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 17:05:32,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:32,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:32,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:33,745 INFO L124 PetriNetUnfolderBase]: 3704/5939 cut-off events. [2024-06-20 17:05:33,745 INFO L125 PetriNetUnfolderBase]: For 553110/553110 co-relation queries the response was YES. [2024-06-20 17:05:33,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53010 conditions, 5939 events. 3704/5939 cut-off events. For 553110/553110 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37240 event pairs, 667 based on Foata normal form. 2/5935 useless extension candidates. Maximal degree in co-relation 52866. Up to 4789 conditions per place. [2024-06-20 17:05:33,822 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 296 selfloop transitions, 149 changer transitions 0/450 dead transitions. [2024-06-20 17:05:33,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 450 transitions, 7807 flow [2024-06-20 17:05:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 17:05:33,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-20 17:05:33,823 INFO L175 Difference]: Start difference. First operand has 310 places, 421 transitions, 6269 flow. Second operand 8 states and 163 transitions. [2024-06-20 17:05:33,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 450 transitions, 7807 flow [2024-06-20 17:05:35,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 450 transitions, 7397 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:35,022 INFO L231 Difference]: Finished difference. Result has 313 places, 421 transitions, 6165 flow [2024-06-20 17:05:35,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6165, PETRI_PLACES=313, PETRI_TRANSITIONS=421} [2024-06-20 17:05:35,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 17:05:35,023 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 421 transitions, 6165 flow [2024-06-20 17:05:35,023 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 17:05:35,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:35,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:35,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:05:35,023 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 17:05:35,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash 627341635, now seen corresponding path program 7 times [2024-06-20 17:05:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357858944] [2024-06-20 17:05:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357858944] [2024-06-20 17:05:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357858944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:35,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645014039] [2024-06-20 17:05:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:35,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:35,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 421 transitions, 6165 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 17:05:35,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:35,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:35,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:37,181 INFO L124 PetriNetUnfolderBase]: 3724/5977 cut-off events. [2024-06-20 17:05:37,181 INFO L125 PetriNetUnfolderBase]: For 563138/563138 co-relation queries the response was YES. [2024-06-20 17:05:37,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53153 conditions, 5977 events. 3724/5977 cut-off events. For 563138/563138 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37603 event pairs, 662 based on Foata normal form. 2/5973 useless extension candidates. Maximal degree in co-relation 53008. Up to 5406 conditions per place. [2024-06-20 17:05:37,263 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 361 selfloop transitions, 84 changer transitions 0/450 dead transitions. [2024-06-20 17:05:37,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 450 transitions, 7348 flow [2024-06-20 17:05:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:05:37,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:05:37,265 INFO L175 Difference]: Start difference. First operand has 313 places, 421 transitions, 6165 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:05:37,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 450 transitions, 7348 flow [2024-06-20 17:05:38,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 450 transitions, 6774 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:38,677 INFO L231 Difference]: Finished difference. Result has 311 places, 429 transitions, 5942 flow [2024-06-20 17:05:38,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5942, PETRI_PLACES=311, PETRI_TRANSITIONS=429} [2024-06-20 17:05:38,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-20 17:05:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 429 transitions, 5942 flow [2024-06-20 17:05:38,677 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 17:05:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:38,678 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 17:05:38,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:05:38,678 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 17:05:38,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1554744431, now seen corresponding path program 8 times [2024-06-20 17:05:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243945403] [2024-06-20 17:05:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:39,394 INFO 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 17:05:39,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:39,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243945403] [2024-06-20 17:05:39,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243945403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:39,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:39,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:39,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313551700] [2024-06-20 17:05:39,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:39,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:39,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:39,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:39,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 429 transitions, 5942 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:39,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:39,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:39,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:40,754 INFO L124 PetriNetUnfolderBase]: 3706/5939 cut-off events. [2024-06-20 17:05:40,754 INFO L125 PetriNetUnfolderBase]: For 563585/563585 co-relation queries the response was YES. [2024-06-20 17:05:40,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51494 conditions, 5939 events. 3706/5939 cut-off events. For 563585/563585 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37197 event pairs, 649 based on Foata normal form. 6/5939 useless extension candidates. Maximal degree in co-relation 51350. Up to 5238 conditions per place. [2024-06-20 17:05:40,834 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 351 selfloop transitions, 97 changer transitions 0/453 dead transitions. [2024-06-20 17:05:40,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 7188 flow [2024-06-20 17:05:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:05:40,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-20 17:05:40,835 INFO L175 Difference]: Start difference. First operand has 311 places, 429 transitions, 5942 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:05:40,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 7188 flow [2024-06-20 17:05:42,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 453 transitions, 6995 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:42,297 INFO L231 Difference]: Finished difference. Result has 315 places, 429 transitions, 5952 flow [2024-06-20 17:05:42,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5952, PETRI_PLACES=315, PETRI_TRANSITIONS=429} [2024-06-20 17:05:42,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-20 17:05:42,297 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 429 transitions, 5952 flow [2024-06-20 17:05:42,297 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 17:05:42,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:42,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:42,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:05:42,298 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 17:05:42,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash -764478425, now seen corresponding path program 9 times [2024-06-20 17:05:42,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:42,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23017602] [2024-06-20 17:05:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:42,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:43,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:43,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23017602] [2024-06-20 17:05:43,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23017602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:43,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:43,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:43,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130849586] [2024-06-20 17:05:43,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:43,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:43,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 429 transitions, 5952 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 17:05:43,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:43,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:43,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:44,446 INFO L124 PetriNetUnfolderBase]: 3680/5909 cut-off events. [2024-06-20 17:05:44,446 INFO L125 PetriNetUnfolderBase]: For 556911/556911 co-relation queries the response was YES. [2024-06-20 17:05:44,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50858 conditions, 5909 events. 3680/5909 cut-off events. For 556911/556911 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37077 event pairs, 651 based on Foata normal form. 6/5909 useless extension candidates. Maximal degree in co-relation 50713. Up to 5219 conditions per place. [2024-06-20 17:05:44,526 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 351 selfloop transitions, 102 changer transitions 0/458 dead transitions. [2024-06-20 17:05:44,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 458 transitions, 7107 flow [2024-06-20 17:05:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 17:05:44,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 17:05:44,527 INFO L175 Difference]: Start difference. First operand has 315 places, 429 transitions, 5952 flow. Second operand 10 states and 188 transitions. [2024-06-20 17:05:44,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 458 transitions, 7107 flow [2024-06-20 17:05:45,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 458 transitions, 6814 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:45,852 INFO L231 Difference]: Finished difference. Result has 320 places, 429 transitions, 5871 flow [2024-06-20 17:05:45,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5871, PETRI_PLACES=320, PETRI_TRANSITIONS=429} [2024-06-20 17:05:45,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:05:45,852 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 429 transitions, 5871 flow [2024-06-20 17:05:45,852 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 17:05:45,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:45,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:45,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:05:45,853 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 17:05:45,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1478267457, now seen corresponding path program 10 times [2024-06-20 17:05:45,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:45,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163021811] [2024-06-20 17:05:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:45,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:46,538 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 17:05:46,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163021811] [2024-06-20 17:05:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163021811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:46,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:46,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192502460] [2024-06-20 17:05:46,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:46,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:46,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 429 transitions, 5871 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 17:05:46,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:46,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:47,896 INFO L124 PetriNetUnfolderBase]: 3662/5881 cut-off events. [2024-06-20 17:05:47,896 INFO L125 PetriNetUnfolderBase]: For 546058/546058 co-relation queries the response was YES. [2024-06-20 17:05:47,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49860 conditions, 5881 events. 3662/5881 cut-off events. For 546058/546058 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36858 event pairs, 666 based on Foata normal form. 6/5881 useless extension candidates. Maximal degree in co-relation 49714. Up to 5069 conditions per place. [2024-06-20 17:05:47,967 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 324 selfloop transitions, 127 changer transitions 0/456 dead transitions. [2024-06-20 17:05:47,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 456 transitions, 7111 flow [2024-06-20 17:05:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 17:05:47,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-20 17:05:47,968 INFO L175 Difference]: Start difference. First operand has 320 places, 429 transitions, 5871 flow. Second operand 7 states and 145 transitions. [2024-06-20 17:05:47,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 456 transitions, 7111 flow [2024-06-20 17:05:49,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 456 transitions, 6764 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:49,298 INFO L231 Difference]: Finished difference. Result has 317 places, 429 transitions, 5794 flow [2024-06-20 17:05:49,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5524, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5794, PETRI_PLACES=317, PETRI_TRANSITIONS=429} [2024-06-20 17:05:49,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:05:49,298 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 429 transitions, 5794 flow [2024-06-20 17:05:49,299 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 17:05:49,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:49,299 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 17:05:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:05:49,299 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 17:05:49,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:49,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1478534367, now seen corresponding path program 11 times [2024-06-20 17:05:49,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:49,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834337086] [2024-06-20 17:05:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:49,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:49,980 INFO 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 17:05:49,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:49,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834337086] [2024-06-20 17:05:49,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834337086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:49,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:49,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:49,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026195737] [2024-06-20 17:05:49,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:49,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:49,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:49,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:50,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:50,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 429 transitions, 5794 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 17:05:50,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:50,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:50,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:51,297 INFO L124 PetriNetUnfolderBase]: 3644/5861 cut-off events. [2024-06-20 17:05:51,297 INFO L125 PetriNetUnfolderBase]: For 536138/536138 co-relation queries the response was YES. [2024-06-20 17:05:51,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49071 conditions, 5861 events. 3644/5861 cut-off events. For 536138/536138 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 36755 event pairs, 679 based on Foata normal form. 6/5861 useless extension candidates. Maximal degree in co-relation 48924. Up to 5058 conditions per place. [2024-06-20 17:05:51,377 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 331 selfloop transitions, 120 changer transitions 0/456 dead transitions. [2024-06-20 17:05:51,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 456 transitions, 7036 flow [2024-06-20 17:05:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-20 17:05:51,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-20 17:05:51,378 INFO L175 Difference]: Start difference. First operand has 317 places, 429 transitions, 5794 flow. Second operand 7 states and 146 transitions. [2024-06-20 17:05:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 456 transitions, 7036 flow [2024-06-20 17:05:52,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 456 transitions, 6763 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:52,458 INFO L231 Difference]: Finished difference. Result has 318 places, 429 transitions, 5781 flow [2024-06-20 17:05:52,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5781, PETRI_PLACES=318, PETRI_TRANSITIONS=429} [2024-06-20 17:05:52,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 17:05:52,459 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 429 transitions, 5781 flow [2024-06-20 17:05:52,459 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 17:05:52,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:52,459 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 17:05:52,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:05:52,459 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 17:05:52,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 196221439, now seen corresponding path program 12 times [2024-06-20 17:05:52,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:52,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267933455] [2024-06-20 17:05:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:52,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:53,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:53,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267933455] [2024-06-20 17:05:53,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267933455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:53,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:53,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:53,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351842469] [2024-06-20 17:05:53,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:53,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:53,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:53,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:53,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 429 transitions, 5781 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 17:05:53,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:53,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:53,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:54,439 INFO L124 PetriNetUnfolderBase]: 3618/5826 cut-off events. [2024-06-20 17:05:54,439 INFO L125 PetriNetUnfolderBase]: For 511670/511670 co-relation queries the response was YES. [2024-06-20 17:05:54,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48007 conditions, 5826 events. 3618/5826 cut-off events. For 511670/511670 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36504 event pairs, 682 based on Foata normal form. 6/5830 useless extension candidates. Maximal degree in co-relation 47860. Up to 5350 conditions per place. [2024-06-20 17:05:54,518 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 365 selfloop transitions, 83 changer transitions 0/453 dead transitions. [2024-06-20 17:05:54,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 453 transitions, 6792 flow [2024-06-20 17:05:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 17:05:54,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-20 17:05:54,519 INFO L175 Difference]: Start difference. First operand has 318 places, 429 transitions, 5781 flow. Second operand 7 states and 143 transitions. [2024-06-20 17:05:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 453 transitions, 6792 flow [2024-06-20 17:05:55,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 453 transitions, 6575 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:55,828 INFO L231 Difference]: Finished difference. Result has 320 places, 429 transitions, 5773 flow [2024-06-20 17:05:55,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5773, PETRI_PLACES=320, PETRI_TRANSITIONS=429} [2024-06-20 17:05:55,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:05:55,828 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 429 transitions, 5773 flow [2024-06-20 17:05:55,828 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 17:05:55,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:55,829 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 17:05:55,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:05:55,829 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 17:05:55,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash -735137673, now seen corresponding path program 1 times [2024-06-20 17:05:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581780765] [2024-06-20 17:05:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:56,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:56,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581780765] [2024-06-20 17:05:56,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581780765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:56,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:56,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146710211] [2024-06-20 17:05:56,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:56,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:56,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:56,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:05:56,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 429 transitions, 5773 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 17:05:56,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:56,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:05:56,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:58,089 INFO L124 PetriNetUnfolderBase]: 3646/5864 cut-off events. [2024-06-20 17:05:58,089 INFO L125 PetriNetUnfolderBase]: For 519000/519000 co-relation queries the response was YES. [2024-06-20 17:05:58,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47985 conditions, 5864 events. 3646/5864 cut-off events. For 519000/519000 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 36771 event pairs, 653 based on Foata normal form. 8/5870 useless extension candidates. Maximal degree in co-relation 47838. Up to 5399 conditions per place. [2024-06-20 17:05:58,166 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 411 selfloop transitions, 37 changer transitions 0/453 dead transitions. [2024-06-20 17:05:58,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 453 transitions, 6833 flow [2024-06-20 17:05:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-20 17:05:58,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-20 17:05:58,167 INFO L175 Difference]: Start difference. First operand has 320 places, 429 transitions, 5773 flow. Second operand 6 states and 128 transitions. [2024-06-20 17:05:58,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 453 transitions, 6833 flow [2024-06-20 17:05:59,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 453 transitions, 6324 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:59,381 INFO L231 Difference]: Finished difference. Result has 316 places, 430 transitions, 5362 flow [2024-06-20 17:05:59,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5264, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5362, PETRI_PLACES=316, PETRI_TRANSITIONS=430} [2024-06-20 17:05:59,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 17:05:59,382 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 430 transitions, 5362 flow [2024-06-20 17:05:59,382 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 17:05:59,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:59,382 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 17:05:59,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:05:59,382 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 17:05:59,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1241607753, now seen corresponding path program 2 times [2024-06-20 17:05:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399769580] [2024-06-20 17:05:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:00,223 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 17:06:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399769580] [2024-06-20 17:06:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399769580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:00,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:00,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:00,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278010403] [2024-06-20 17:06:00,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:00,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:00,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:00,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:00,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:00,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 430 transitions, 5362 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 17:06:00,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:00,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:00,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:01,593 INFO L124 PetriNetUnfolderBase]: 3648/5867 cut-off events. [2024-06-20 17:06:01,593 INFO L125 PetriNetUnfolderBase]: For 501546/501546 co-relation queries the response was YES. [2024-06-20 17:06:01,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47305 conditions, 5867 events. 3648/5867 cut-off events. For 501546/501546 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 36743 event pairs, 673 based on Foata normal form. 8/5866 useless extension candidates. Maximal degree in co-relation 47157. Up to 5265 conditions per place. [2024-06-20 17:06:01,666 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 418 selfloop transitions, 32 changer transitions 0/455 dead transitions. [2024-06-20 17:06:01,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 455 transitions, 6654 flow [2024-06-20 17:06:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 17:06:01,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 17:06:01,667 INFO L175 Difference]: Start difference. First operand has 316 places, 430 transitions, 5362 flow. Second operand 6 states and 121 transitions. [2024-06-20 17:06:01,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 455 transitions, 6654 flow [2024-06-20 17:06:02,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 455 transitions, 6586 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:02,761 INFO L231 Difference]: Finished difference. Result has 318 places, 431 transitions, 5374 flow [2024-06-20 17:06:02,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5374, PETRI_PLACES=318, PETRI_TRANSITIONS=431} [2024-06-20 17:06:02,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 17:06:02,762 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 431 transitions, 5374 flow [2024-06-20 17:06:02,762 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 17:06:02,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:02,762 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 17:06:02,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:06:02,763 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 17:06:02,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 893255295, now seen corresponding path program 1 times [2024-06-20 17:06:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770699407] [2024-06-20 17:06:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:03,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770699407] [2024-06-20 17:06:03,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770699407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:03,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:03,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375663900] [2024-06-20 17:06:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:03,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:03,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 431 transitions, 5374 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 17:06:03,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:03,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:03,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:05,171 INFO L124 PetriNetUnfolderBase]: 3656/5896 cut-off events. [2024-06-20 17:06:05,171 INFO L125 PetriNetUnfolderBase]: For 495328/495328 co-relation queries the response was YES. [2024-06-20 17:06:05,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47642 conditions, 5896 events. 3656/5896 cut-off events. For 495328/495328 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37124 event pairs, 688 based on Foata normal form. 2/5896 useless extension candidates. Maximal degree in co-relation 47493. Up to 5537 conditions per place. [2024-06-20 17:06:05,253 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 47 changer transitions 0/461 dead transitions. [2024-06-20 17:06:05,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 461 transitions, 6658 flow [2024-06-20 17:06:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:06:05,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:06:05,254 INFO L175 Difference]: Start difference. First operand has 318 places, 431 transitions, 5374 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:06:05,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 461 transitions, 6658 flow [2024-06-20 17:06:06,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 461 transitions, 6603 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:06,646 INFO L231 Difference]: Finished difference. Result has 324 places, 435 transitions, 5554 flow [2024-06-20 17:06:06,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5554, PETRI_PLACES=324, PETRI_TRANSITIONS=435} [2024-06-20 17:06:06,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 17:06:06,646 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 435 transitions, 5554 flow [2024-06-20 17:06:06,646 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 17:06:06,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:06,646 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 17:06:06,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:06:06,647 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 17:06:06,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 893315745, now seen corresponding path program 2 times [2024-06-20 17:06:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:06,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105285078] [2024-06-20 17:06:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:07,692 INFO 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 17:06:07,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:07,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105285078] [2024-06-20 17:06:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105285078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:07,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164700051] [2024-06-20 17:06:07,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:07,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:07,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:07,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:07,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 435 transitions, 5554 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 17:06:07,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:07,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:07,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:09,080 INFO L124 PetriNetUnfolderBase]: 3664/5908 cut-off events. [2024-06-20 17:06:09,080 INFO L125 PetriNetUnfolderBase]: For 507036/507036 co-relation queries the response was YES. [2024-06-20 17:06:09,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47928 conditions, 5908 events. 3664/5908 cut-off events. For 507036/507036 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 37201 event pairs, 722 based on Foata normal form. 2/5908 useless extension candidates. Maximal degree in co-relation 47778. Up to 5582 conditions per place. [2024-06-20 17:06:09,161 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 45 changer transitions 0/459 dead transitions. [2024-06-20 17:06:09,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 459 transitions, 6594 flow [2024-06-20 17:06:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:06:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:06:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:06:09,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-20 17:06:09,162 INFO L175 Difference]: Start difference. First operand has 324 places, 435 transitions, 5554 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:06:09,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 459 transitions, 6594 flow [2024-06-20 17:06:10,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 459 transitions, 6441 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:10,303 INFO L231 Difference]: Finished difference. Result has 329 places, 437 transitions, 5571 flow [2024-06-20 17:06:10,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5571, PETRI_PLACES=329, PETRI_TRANSITIONS=437} [2024-06-20 17:06:10,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-20 17:06:10,304 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 437 transitions, 5571 flow [2024-06-20 17:06:10,304 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 17:06:10,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:10,304 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 17:06:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:06:10,304 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 17:06:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 893315869, now seen corresponding path program 1 times [2024-06-20 17:06:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099272875] [2024-06-20 17:06:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:11,323 INFO 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 17:06:11,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:11,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099272875] [2024-06-20 17:06:11,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099272875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:11,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:11,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044232048] [2024-06-20 17:06:11,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:11,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:11,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:11,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 437 transitions, 5571 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 17:06:11,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:11,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:12,821 INFO L124 PetriNetUnfolderBase]: 3728/5994 cut-off events. [2024-06-20 17:06:12,821 INFO L125 PetriNetUnfolderBase]: For 542848/542848 co-relation queries the response was YES. [2024-06-20 17:06:12,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49241 conditions, 5994 events. 3728/5994 cut-off events. For 542848/542848 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 37794 event pairs, 644 based on Foata normal form. 4/5991 useless extension candidates. Maximal degree in co-relation 49089. Up to 5055 conditions per place. [2024-06-20 17:06:12,906 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 412 selfloop transitions, 104 changer transitions 0/521 dead transitions. [2024-06-20 17:06:12,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 521 transitions, 7751 flow [2024-06-20 17:06:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 17:06:12,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 17:06:12,907 INFO L175 Difference]: Start difference. First operand has 329 places, 437 transitions, 5571 flow. Second operand 8 states and 159 transitions. [2024-06-20 17:06:12,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 521 transitions, 7751 flow [2024-06-20 17:06:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 521 transitions, 7623 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 17:06:14,196 INFO L231 Difference]: Finished difference. Result has 332 places, 471 transitions, 6280 flow [2024-06-20 17:06:14,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6280, PETRI_PLACES=332, PETRI_TRANSITIONS=471} [2024-06-20 17:06:14,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 17:06:14,197 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 471 transitions, 6280 flow [2024-06-20 17:06:14,197 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 17:06:14,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:14,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:06:14,198 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 17:06:14,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1847681531, now seen corresponding path program 2 times [2024-06-20 17:06:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595635677] [2024-06-20 17:06:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595635677] [2024-06-20 17:06:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595635677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:15,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:15,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444685544] [2024-06-20 17:06:15,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:15,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:15,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:15,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 471 transitions, 6280 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 17:06:15,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:15,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:15,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:16,663 INFO L124 PetriNetUnfolderBase]: 3792/6087 cut-off events. [2024-06-20 17:06:16,663 INFO L125 PetriNetUnfolderBase]: For 579980/579980 co-relation queries the response was YES. [2024-06-20 17:06:16,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 6087 events. 3792/6087 cut-off events. For 579980/579980 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 38326 event pairs, 655 based on Foata normal form. 4/6085 useless extension candidates. Maximal degree in co-relation 51973. Up to 5471 conditions per place. [2024-06-20 17:06:16,764 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 433 selfloop transitions, 85 changer transitions 0/523 dead transitions. [2024-06-20 17:06:16,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 523 transitions, 8273 flow [2024-06-20 17:06:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:06:16,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:06:16,765 INFO L175 Difference]: Start difference. First operand has 332 places, 471 transitions, 6280 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:06:16,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 523 transitions, 8273 flow [2024-06-20 17:06:18,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 523 transitions, 8079 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:18,223 INFO L231 Difference]: Finished difference. Result has 343 places, 497 transitions, 6840 flow [2024-06-20 17:06:18,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6840, PETRI_PLACES=343, PETRI_TRANSITIONS=497} [2024-06-20 17:06:18,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-20 17:06:18,224 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 497 transitions, 6840 flow [2024-06-20 17:06:18,224 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 17:06:18,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:18,224 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 17:06:18,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:06:18,224 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 17:06:18,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1011588123, now seen corresponding path program 1 times [2024-06-20 17:06:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:18,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868054611] [2024-06-20 17:06:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:18,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:19,191 INFO 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 17:06:19,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868054611] [2024-06-20 17:06:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868054611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:19,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055734980] [2024-06-20 17:06:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:19,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:19,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 497 transitions, 6840 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 17:06:19,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:19,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:19,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:20,815 INFO L124 PetriNetUnfolderBase]: 3859/6186 cut-off events. [2024-06-20 17:06:20,816 INFO L125 PetriNetUnfolderBase]: For 638374/638374 co-relation queries the response was YES. [2024-06-20 17:06:20,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53377 conditions, 6186 events. 3859/6186 cut-off events. For 638374/638374 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39024 event pairs, 669 based on Foata normal form. 16/6193 useless extension candidates. Maximal degree in co-relation 53215. Up to 5478 conditions per place. [2024-06-20 17:06:20,905 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 413 selfloop transitions, 111 changer transitions 0/529 dead transitions. [2024-06-20 17:06:20,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 529 transitions, 8385 flow [2024-06-20 17:06:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 17:06:20,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-20 17:06:20,906 INFO L175 Difference]: Start difference. First operand has 343 places, 497 transitions, 6840 flow. Second operand 8 states and 158 transitions. [2024-06-20 17:06:20,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 529 transitions, 8385 flow [2024-06-20 17:06:22,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 529 transitions, 8257 flow, removed 63 selfloop flow, removed 1 redundant places. [2024-06-20 17:06:22,498 INFO L231 Difference]: Finished difference. Result has 352 places, 505 transitions, 7152 flow [2024-06-20 17:06:22,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7152, PETRI_PLACES=352, PETRI_TRANSITIONS=505} [2024-06-20 17:06:22,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-20 17:06:22,499 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 505 transitions, 7152 flow [2024-06-20 17:06:22,499 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 17:06:22,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:22,500 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 17:06:22,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:06:22,500 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 17:06:22,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -391338431, now seen corresponding path program 3 times [2024-06-20 17:06:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:22,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243962981] [2024-06-20 17:06:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:22,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:23,407 INFO 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 17:06:23,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:23,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243962981] [2024-06-20 17:06:23,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243962981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:23,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:23,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:23,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410725809] [2024-06-20 17:06:23,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:23,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:23,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:23,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:23,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 505 transitions, 7152 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 17:06:23,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:23,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:23,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:25,162 INFO L124 PetriNetUnfolderBase]: 3879/6226 cut-off events. [2024-06-20 17:06:25,162 INFO L125 PetriNetUnfolderBase]: For 617800/617800 co-relation queries the response was YES. [2024-06-20 17:06:25,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54125 conditions, 6226 events. 3879/6226 cut-off events. For 617800/617800 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39346 event pairs, 667 based on Foata normal form. 4/6224 useless extension candidates. Maximal degree in co-relation 53958. Up to 5661 conditions per place. [2024-06-20 17:06:25,247 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 441 selfloop transitions, 93 changer transitions 0/539 dead transitions. [2024-06-20 17:06:25,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 539 transitions, 8674 flow [2024-06-20 17:06:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:06:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:06:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-20 17:06:25,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-20 17:06:25,248 INFO L175 Difference]: Start difference. First operand has 352 places, 505 transitions, 7152 flow. Second operand 11 states and 200 transitions. [2024-06-20 17:06:25,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 539 transitions, 8674 flow [2024-06-20 17:06:26,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 539 transitions, 8450 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:27,001 INFO L231 Difference]: Finished difference. Result has 361 places, 515 transitions, 7304 flow [2024-06-20 17:06:27,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6928, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7304, PETRI_PLACES=361, PETRI_TRANSITIONS=515} [2024-06-20 17:06:27,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:06:27,002 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 515 transitions, 7304 flow [2024-06-20 17:06:27,002 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 17:06:27,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:27,002 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 17:06:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:06:27,002 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 17:06:27,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash -391511411, now seen corresponding path program 4 times [2024-06-20 17:06:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:27,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772583862] [2024-06-20 17:06:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:27,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:27,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:27,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772583862] [2024-06-20 17:06:27,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772583862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:27,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:27,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:27,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170065995] [2024-06-20 17:06:27,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:27,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:27,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:28,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:28,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 515 transitions, 7304 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 17:06:28,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:28,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:28,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:29,818 INFO L124 PetriNetUnfolderBase]: 3935/6297 cut-off events. [2024-06-20 17:06:29,818 INFO L125 PetriNetUnfolderBase]: For 652442/652442 co-relation queries the response was YES. [2024-06-20 17:06:29,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55240 conditions, 6297 events. 3935/6297 cut-off events. For 652442/652442 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39759 event pairs, 667 based on Foata normal form. 8/6296 useless extension candidates. Maximal degree in co-relation 55071. Up to 5460 conditions per place. [2024-06-20 17:06:29,899 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 395 selfloop transitions, 151 changer transitions 0/551 dead transitions. [2024-06-20 17:06:29,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 551 transitions, 9270 flow [2024-06-20 17:06:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 17:06:29,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-20 17:06:29,901 INFO L175 Difference]: Start difference. First operand has 361 places, 515 transitions, 7304 flow. Second operand 9 states and 175 transitions. [2024-06-20 17:06:29,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 551 transitions, 9270 flow [2024-06-20 17:06:31,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 551 transitions, 9037 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:31,528 INFO L231 Difference]: Finished difference. Result has 366 places, 529 transitions, 7879 flow [2024-06-20 17:06:31,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7879, PETRI_PLACES=366, PETRI_TRANSITIONS=529} [2024-06-20 17:06:31,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-20 17:06:31,529 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 529 transitions, 7879 flow [2024-06-20 17:06:31,529 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 17:06:31,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:31,529 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 17:06:31,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:06:31,529 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 17:06:31,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -391516185, now seen corresponding path program 3 times [2024-06-20 17:06:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503344219] [2024-06-20 17:06:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:32,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503344219] [2024-06-20 17:06:32,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503344219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:32,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:32,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:32,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835029709] [2024-06-20 17:06:32,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:32,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:32,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:32,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:32,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:32,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:32,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 529 transitions, 7879 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 17:06:32,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:32,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:32,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:34,499 INFO L124 PetriNetUnfolderBase]: 3943/6312 cut-off events. [2024-06-20 17:06:34,499 INFO L125 PetriNetUnfolderBase]: For 664920/664920 co-relation queries the response was YES. [2024-06-20 17:06:34,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56614 conditions, 6312 events. 3943/6312 cut-off events. For 664920/664920 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39847 event pairs, 749 based on Foata normal form. 2/6312 useless extension candidates. Maximal degree in co-relation 56442. Up to 6015 conditions per place. [2024-06-20 17:06:34,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 25 changer transitions 0/546 dead transitions. [2024-06-20 17:06:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 546 transitions, 9055 flow [2024-06-20 17:06:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:06:34,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 17:06:34,585 INFO L175 Difference]: Start difference. First operand has 366 places, 529 transitions, 7879 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:06:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 546 transitions, 9055 flow [2024-06-20 17:06:36,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 546 transitions, 8660 flow, removed 129 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:36,583 INFO L231 Difference]: Finished difference. Result has 370 places, 531 transitions, 7597 flow [2024-06-20 17:06:36,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7597, PETRI_PLACES=370, PETRI_TRANSITIONS=531} [2024-06-20 17:06:36,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-20 17:06:36,583 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 531 transitions, 7597 flow [2024-06-20 17:06:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:36,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:36,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:36,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:06:36,584 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 17:06:36,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1478257537, now seen corresponding path program 4 times [2024-06-20 17:06:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:36,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857788009] [2024-06-20 17:06:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:37,483 INFO 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 17:06:37,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857788009] [2024-06-20 17:06:37,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857788009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:37,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:37,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:37,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194741462] [2024-06-20 17:06:37,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:37,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:37,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:37,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:37,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 531 transitions, 7597 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 17:06:37,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:37,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:37,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:39,206 INFO L124 PetriNetUnfolderBase]: 3938/6305 cut-off events. [2024-06-20 17:06:39,206 INFO L125 PetriNetUnfolderBase]: For 648453/648453 co-relation queries the response was YES. [2024-06-20 17:06:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 6305 events. 3938/6305 cut-off events. For 648453/648453 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39771 event pairs, 715 based on Foata normal form. 2/6305 useless extension candidates. Maximal degree in co-relation 55470. Up to 5975 conditions per place. [2024-06-20 17:06:39,469 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 519 selfloop transitions, 30 changer transitions 0/554 dead transitions. [2024-06-20 17:06:39,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 554 transitions, 8763 flow [2024-06-20 17:06:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:06:39,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:06:39,470 INFO L175 Difference]: Start difference. First operand has 370 places, 531 transitions, 7597 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:06:39,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 554 transitions, 8763 flow [2024-06-20 17:06:41,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 554 transitions, 8628 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 17:06:41,287 INFO L231 Difference]: Finished difference. Result has 371 places, 531 transitions, 7530 flow [2024-06-20 17:06:41,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7462, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7530, PETRI_PLACES=371, PETRI_TRANSITIONS=531} [2024-06-20 17:06:41,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 17:06:41,288 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 531 transitions, 7530 flow [2024-06-20 17:06:41,288 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 17:06:41,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:41,289 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 17:06:41,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:06:41,289 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 17:06:41,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1478072839, now seen corresponding path program 2 times [2024-06-20 17:06:41,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:41,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615854266] [2024-06-20 17:06:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:41,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:42,206 INFO 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 17:06:42,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:42,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615854266] [2024-06-20 17:06:42,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615854266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:42,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:42,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:42,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394145046] [2024-06-20 17:06:42,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:42,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:42,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:42,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:42,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 531 transitions, 7530 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 17:06:42,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:42,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:42,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:43,829 INFO L124 PetriNetUnfolderBase]: 3984/6364 cut-off events. [2024-06-20 17:06:43,829 INFO L125 PetriNetUnfolderBase]: For 711132/711132 co-relation queries the response was YES. [2024-06-20 17:06:43,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56098 conditions, 6364 events. 3984/6364 cut-off events. For 711132/711132 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 40157 event pairs, 674 based on Foata normal form. 16/6371 useless extension candidates. Maximal degree in co-relation 55924. Up to 5601 conditions per place. [2024-06-20 17:06:43,928 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 112 changer transitions 0/555 dead transitions. [2024-06-20 17:06:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 555 transitions, 8874 flow [2024-06-20 17:06:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 17:06:43,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-20 17:06:43,929 INFO L175 Difference]: Start difference. First operand has 371 places, 531 transitions, 7530 flow. Second operand 7 states and 139 transitions. [2024-06-20 17:06:43,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 555 transitions, 8874 flow [2024-06-20 17:06:45,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 555 transitions, 8771 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:06:45,896 INFO L231 Difference]: Finished difference. Result has 372 places, 533 transitions, 7775 flow [2024-06-20 17:06:45,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7427, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7775, PETRI_PLACES=372, PETRI_TRANSITIONS=533} [2024-06-20 17:06:45,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 17:06:45,896 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 533 transitions, 7775 flow [2024-06-20 17:06:45,896 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 17:06:45,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:45,897 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 17:06:45,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:06:45,897 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 17:06:45,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1241897479, now seen corresponding path program 3 times [2024-06-20 17:06:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480776588] [2024-06-20 17:06:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:46,744 INFO 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 17:06:46,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480776588] [2024-06-20 17:06:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480776588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:46,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:46,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099343628] [2024-06-20 17:06:46,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:46,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:46,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:46,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:46,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 533 transitions, 7775 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 17:06:46,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:46,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:46,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:48,446 INFO L124 PetriNetUnfolderBase]: 4036/6444 cut-off events. [2024-06-20 17:06:48,446 INFO L125 PetriNetUnfolderBase]: For 736971/736971 co-relation queries the response was YES. [2024-06-20 17:06:48,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57614 conditions, 6444 events. 4036/6444 cut-off events. For 736971/736971 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40681 event pairs, 750 based on Foata normal form. 14/6449 useless extension candidates. Maximal degree in co-relation 57438. Up to 5975 conditions per place. [2024-06-20 17:06:48,550 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 49 changer transitions 0/554 dead transitions. [2024-06-20 17:06:48,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 554 transitions, 9120 flow [2024-06-20 17:06:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 17:06:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-20 17:06:48,553 INFO L175 Difference]: Start difference. First operand has 372 places, 533 transitions, 7775 flow. Second operand 7 states and 134 transitions. [2024-06-20 17:06:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 554 transitions, 9120 flow [2024-06-20 17:06:50,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 554 transitions, 8900 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:50,730 INFO L231 Difference]: Finished difference. Result has 374 places, 535 transitions, 7741 flow [2024-06-20 17:06:50,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7559, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7741, PETRI_PLACES=374, PETRI_TRANSITIONS=535} [2024-06-20 17:06:50,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 17:06:50,731 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 535 transitions, 7741 flow [2024-06-20 17:06:50,731 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 17:06:50,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:50,732 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 17:06:50,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:06:50,732 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 17:06:50,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1956823691, now seen corresponding path program 5 times [2024-06-20 17:06:50,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:50,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273510818] [2024-06-20 17:06:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:50,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:51,737 INFO 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 17:06:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273510818] [2024-06-20 17:06:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273510818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:51,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943971783] [2024-06-20 17:06:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:51,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:51,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:51,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:51,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 535 transitions, 7741 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 17:06:51,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:51,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:51,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:53,396 INFO L124 PetriNetUnfolderBase]: 4066/6498 cut-off events. [2024-06-20 17:06:53,396 INFO L125 PetriNetUnfolderBase]: For 677373/677373 co-relation queries the response was YES. [2024-06-20 17:06:53,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57381 conditions, 6498 events. 4066/6498 cut-off events. For 677373/677373 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 41139 event pairs, 737 based on Foata normal form. 6/6498 useless extension candidates. Maximal degree in co-relation 57206. Up to 5674 conditions per place. [2024-06-20 17:06:53,501 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 423 selfloop transitions, 135 changer transitions 0/563 dead transitions. [2024-06-20 17:06:53,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 563 transitions, 9213 flow [2024-06-20 17:06:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:06:53,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:06:53,502 INFO L175 Difference]: Start difference. First operand has 374 places, 535 transitions, 7741 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:06:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 563 transitions, 9213 flow [2024-06-20 17:06:55,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 563 transitions, 9073 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:55,493 INFO L231 Difference]: Finished difference. Result has 377 places, 542 transitions, 8088 flow [2024-06-20 17:06:55,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7601, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8088, PETRI_PLACES=377, PETRI_TRANSITIONS=542} [2024-06-20 17:06:55,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 17:06:55,494 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 542 transitions, 8088 flow [2024-06-20 17:06:55,494 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 17:06:55,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:55,494 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 17:06:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:06:55,494 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 17:06:55,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1241600809, now seen corresponding path program 4 times [2024-06-20 17:06:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:55,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542019796] [2024-06-20 17:06:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:56,271 INFO 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 17:06:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542019796] [2024-06-20 17:06:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542019796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212485030] [2024-06-20 17:06:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:56,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:06:56,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 542 transitions, 8088 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 17:06:56,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:56,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:06:56,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:57,912 INFO L124 PetriNetUnfolderBase]: 4089/6539 cut-off events. [2024-06-20 17:06:57,912 INFO L125 PetriNetUnfolderBase]: For 703463/703463 co-relation queries the response was YES. [2024-06-20 17:06:57,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58463 conditions, 6539 events. 4089/6539 cut-off events. For 703463/703463 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41450 event pairs, 741 based on Foata normal form. 10/6543 useless extension candidates. Maximal degree in co-relation 58287. Up to 6160 conditions per place. [2024-06-20 17:06:58,030 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 522 selfloop transitions, 33 changer transitions 0/560 dead transitions. [2024-06-20 17:06:58,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 560 transitions, 9391 flow [2024-06-20 17:06:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:06:58,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 17:06:58,031 INFO L175 Difference]: Start difference. First operand has 377 places, 542 transitions, 8088 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:06:58,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 560 transitions, 9391 flow [2024-06-20 17:07:00,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 560 transitions, 8965 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:00,357 INFO L231 Difference]: Finished difference. Result has 379 places, 546 transitions, 7846 flow [2024-06-20 17:07:00,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7662, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7846, PETRI_PLACES=379, PETRI_TRANSITIONS=546} [2024-06-20 17:07:00,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-20 17:07:00,358 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 546 transitions, 7846 flow [2024-06-20 17:07:00,358 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 17:07:00,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:00,358 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 17:07:00,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:07:00,358 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 17:07:00,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1478252763, now seen corresponding path program 6 times [2024-06-20 17:07:00,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:00,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787395655] [2024-06-20 17:07:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:00,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:01,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787395655] [2024-06-20 17:07:01,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787395655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:01,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:01,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297458348] [2024-06-20 17:07:01,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:01,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:01,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 546 transitions, 7846 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 17:07:01,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:01,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:01,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:03,178 INFO L124 PetriNetUnfolderBase]: 4119/6581 cut-off events. [2024-06-20 17:07:03,178 INFO L125 PetriNetUnfolderBase]: For 701849/701849 co-relation queries the response was YES. [2024-06-20 17:07:03,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58634 conditions, 6581 events. 4119/6581 cut-off events. For 701849/701849 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 41687 event pairs, 718 based on Foata normal form. 6/6581 useless extension candidates. Maximal degree in co-relation 58456. Up to 5949 conditions per place. [2024-06-20 17:07:03,286 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 476 selfloop transitions, 89 changer transitions 0/570 dead transitions. [2024-06-20 17:07:03,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 570 transitions, 9307 flow [2024-06-20 17:07:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:07:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:07:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 17:07:03,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:07:03,287 INFO L175 Difference]: Start difference. First operand has 379 places, 546 transitions, 7846 flow. Second operand 10 states and 175 transitions. [2024-06-20 17:07:03,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 570 transitions, 9307 flow [2024-06-20 17:07:05,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 570 transitions, 9133 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:05,382 INFO L231 Difference]: Finished difference. Result has 384 places, 553 transitions, 8083 flow [2024-06-20 17:07:05,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8083, PETRI_PLACES=384, PETRI_TRANSITIONS=553} [2024-06-20 17:07:05,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-20 17:07:05,383 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 553 transitions, 8083 flow [2024-06-20 17:07:05,383 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 17:07:05,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:05,383 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 17:07:05,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:07:05,383 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 17:07:05,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -563897571, now seen corresponding path program 7 times [2024-06-20 17:07:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4105050] [2024-06-20 17:07:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:05,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:06,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4105050] [2024-06-20 17:07:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4105050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:06,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:06,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:06,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074727346] [2024-06-20 17:07:06,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:06,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:06,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:06,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 553 transitions, 8083 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 17:07:06,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:06,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:06,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:08,071 INFO L124 PetriNetUnfolderBase]: 4143/6601 cut-off events. [2024-06-20 17:07:08,071 INFO L125 PetriNetUnfolderBase]: For 714722/714722 co-relation queries the response was YES. [2024-06-20 17:07:08,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59824 conditions, 6601 events. 4143/6601 cut-off events. For 714722/714722 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 41771 event pairs, 724 based on Foata normal form. 4/6599 useless extension candidates. Maximal degree in co-relation 59647. Up to 5837 conditions per place. [2024-06-20 17:07:08,171 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 480 selfloop transitions, 119 changer transitions 0/604 dead transitions. [2024-06-20 17:07:08,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 604 transitions, 10544 flow [2024-06-20 17:07:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 17:07:08,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-20 17:07:08,172 INFO L175 Difference]: Start difference. First operand has 384 places, 553 transitions, 8083 flow. Second operand 8 states and 162 transitions. [2024-06-20 17:07:08,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 604 transitions, 10544 flow [2024-06-20 17:07:10,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 604 transitions, 10140 flow, removed 119 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:10,174 INFO L231 Difference]: Finished difference. Result has 387 places, 572 transitions, 8470 flow [2024-06-20 17:07:10,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8470, PETRI_PLACES=387, PETRI_TRANSITIONS=572} [2024-06-20 17:07:10,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-20 17:07:10,174 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 572 transitions, 8470 flow [2024-06-20 17:07:10,175 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 17:07:10,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:10,175 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 17:07:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:07:10,175 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 17:07:10,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 582345327, now seen corresponding path program 8 times [2024-06-20 17:07:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:10,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265053879] [2024-06-20 17:07:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:10,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:11,087 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 17:07:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265053879] [2024-06-20 17:07:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265053879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:11,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:11,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:11,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241070515] [2024-06-20 17:07:11,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:11,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:11,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:11,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:11,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:11,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 572 transitions, 8470 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 17:07:11,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:11,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:11,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:12,965 INFO L124 PetriNetUnfolderBase]: 4157/6641 cut-off events. [2024-06-20 17:07:12,965 INFO L125 PetriNetUnfolderBase]: For 736353/736353 co-relation queries the response was YES. [2024-06-20 17:07:13,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60609 conditions, 6641 events. 4157/6641 cut-off events. For 736353/736353 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 42142 event pairs, 757 based on Foata normal form. 6/6641 useless extension candidates. Maximal degree in co-relation 60430. Up to 6247 conditions per place. [2024-06-20 17:07:13,079 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 547 selfloop transitions, 42 changer transitions 0/594 dead transitions. [2024-06-20 17:07:13,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 594 transitions, 9994 flow [2024-06-20 17:07:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:07:13,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:07:13,080 INFO L175 Difference]: Start difference. First operand has 387 places, 572 transitions, 8470 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:07:13,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 594 transitions, 9994 flow [2024-06-20 17:07:15,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 594 transitions, 9802 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-20 17:07:15,083 INFO L231 Difference]: Finished difference. Result has 393 places, 579 transitions, 8627 flow [2024-06-20 17:07:15,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8288, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8627, PETRI_PLACES=393, PETRI_TRANSITIONS=579} [2024-06-20 17:07:15,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-20 17:07:15,083 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 579 transitions, 8627 flow [2024-06-20 17:07:15,083 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 17:07:15,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:15,084 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 17:07:15,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:07:15,084 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 17:07:15,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 582582663, now seen corresponding path program 1 times [2024-06-20 17:07:15,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:15,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628201434] [2024-06-20 17:07:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:15,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:15,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:15,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628201434] [2024-06-20 17:07:15,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628201434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:15,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:15,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770277495] [2024-06-20 17:07:15,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:15,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:15,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:15,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:16,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:16,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 579 transitions, 8627 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 17:07:16,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:16,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:16,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:17,771 INFO L124 PetriNetUnfolderBase]: 4169/6656 cut-off events. [2024-06-20 17:07:17,771 INFO L125 PetriNetUnfolderBase]: For 736414/736414 co-relation queries the response was YES. [2024-06-20 17:07:17,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61201 conditions, 6656 events. 4169/6656 cut-off events. For 736414/736414 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 42297 event pairs, 764 based on Foata normal form. 4/6651 useless extension candidates. Maximal degree in co-relation 61020. Up to 6193 conditions per place. [2024-06-20 17:07:17,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 537 selfloop transitions, 59 changer transitions 0/601 dead transitions. [2024-06-20 17:07:17,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 601 transitions, 10182 flow [2024-06-20 17:07:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 17:07:17,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-20 17:07:17,878 INFO L175 Difference]: Start difference. First operand has 393 places, 579 transitions, 8627 flow. Second operand 7 states and 132 transitions. [2024-06-20 17:07:17,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 601 transitions, 10182 flow [2024-06-20 17:07:19,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 601 transitions, 9919 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:19,940 INFO L231 Difference]: Finished difference. Result has 394 places, 585 transitions, 8736 flow [2024-06-20 17:07:19,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8364, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8736, PETRI_PLACES=394, PETRI_TRANSITIONS=585} [2024-06-20 17:07:19,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 17:07:19,940 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 585 transitions, 8736 flow [2024-06-20 17:07:19,940 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 17:07:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:19,940 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 17:07:19,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:07:19,941 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 17:07:19,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1235661015, now seen corresponding path program 1 times [2024-06-20 17:07:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800751864] [2024-06-20 17:07:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:20,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:20,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800751864] [2024-06-20 17:07:20,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800751864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:20,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:20,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:20,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169213400] [2024-06-20 17:07:20,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:20,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:20,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:20,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:20,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 585 transitions, 8736 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 17:07:20,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:20,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:20,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:22,567 INFO L124 PetriNetUnfolderBase]: 4238/6758 cut-off events. [2024-06-20 17:07:22,567 INFO L125 PetriNetUnfolderBase]: For 774983/774983 co-relation queries the response was YES. [2024-06-20 17:07:22,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63437 conditions, 6758 events. 4238/6758 cut-off events. For 774983/774983 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42819 event pairs, 759 based on Foata normal form. 1/6757 useless extension candidates. Maximal degree in co-relation 63255. Up to 6272 conditions per place. [2024-06-20 17:07:22,675 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 555 selfloop transitions, 84 changer transitions 0/644 dead transitions. [2024-06-20 17:07:22,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 644 transitions, 11379 flow [2024-06-20 17:07:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 17:07:22,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:07:22,676 INFO L175 Difference]: Start difference. First operand has 394 places, 585 transitions, 8736 flow. Second operand 9 states and 180 transitions. [2024-06-20 17:07:22,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 644 transitions, 11379 flow [2024-06-20 17:07:25,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 644 transitions, 11106 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:25,463 INFO L231 Difference]: Finished difference. Result has 401 places, 613 transitions, 9418 flow [2024-06-20 17:07:25,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8469, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9418, PETRI_PLACES=401, PETRI_TRANSITIONS=613} [2024-06-20 17:07:25,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-20 17:07:25,463 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 613 transitions, 9418 flow [2024-06-20 17:07:25,464 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 17:07:25,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:25,464 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 17:07:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:07:25,464 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 17:07:25,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash -777774633, now seen corresponding path program 2 times [2024-06-20 17:07:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:25,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741015651] [2024-06-20 17:07:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:26,416 INFO 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 17:07:26,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:26,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741015651] [2024-06-20 17:07:26,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741015651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:26,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280621301] [2024-06-20 17:07:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:26,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:26,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:26,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 613 transitions, 9418 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 17:07:26,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:26,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:28,214 INFO L124 PetriNetUnfolderBase]: 4240/6755 cut-off events. [2024-06-20 17:07:28,214 INFO L125 PetriNetUnfolderBase]: For 778232/778232 co-relation queries the response was YES. [2024-06-20 17:07:28,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63600 conditions, 6755 events. 4240/6755 cut-off events. For 778232/778232 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 42782 event pairs, 758 based on Foata normal form. 2/6755 useless extension candidates. Maximal degree in co-relation 63414. Up to 6205 conditions per place. [2024-06-20 17:07:28,326 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 532 selfloop transitions, 103 changer transitions 0/640 dead transitions. [2024-06-20 17:07:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 640 transitions, 10898 flow [2024-06-20 17:07:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:07:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 17:07:28,327 INFO L175 Difference]: Start difference. First operand has 401 places, 613 transitions, 9418 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:07:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 640 transitions, 10898 flow [2024-06-20 17:07:30,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 640 transitions, 10772 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:30,390 INFO L231 Difference]: Finished difference. Result has 407 places, 616 transitions, 9636 flow [2024-06-20 17:07:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9292, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9636, PETRI_PLACES=407, PETRI_TRANSITIONS=616} [2024-06-20 17:07:30,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-20 17:07:30,391 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 616 transitions, 9636 flow [2024-06-20 17:07:30,391 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 17:07:30,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:30,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:07:30,391 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 17:07:30,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 543226985, now seen corresponding path program 3 times [2024-06-20 17:07:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202303467] [2024-06-20 17:07:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:31,347 INFO 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 17:07:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202303467] [2024-06-20 17:07:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202303467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:31,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:31,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:31,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307753416] [2024-06-20 17:07:31,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:31,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:31,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 616 transitions, 9636 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 17:07:31,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:31,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:31,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:33,341 INFO L124 PetriNetUnfolderBase]: 4242/6760 cut-off events. [2024-06-20 17:07:33,341 INFO L125 PetriNetUnfolderBase]: For 797574/797574 co-relation queries the response was YES. [2024-06-20 17:07:33,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64423 conditions, 6760 events. 4242/6760 cut-off events. For 797574/797574 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42823 event pairs, 760 based on Foata normal form. 2/6760 useless extension candidates. Maximal degree in co-relation 64235. Up to 6335 conditions per place. [2024-06-20 17:07:33,450 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 566 selfloop transitions, 68 changer transitions 0/639 dead transitions. [2024-06-20 17:07:33,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 639 transitions, 11098 flow [2024-06-20 17:07:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:07:33,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:07:33,451 INFO L175 Difference]: Start difference. First operand has 407 places, 616 transitions, 9636 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:07:33,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 639 transitions, 11098 flow [2024-06-20 17:07:36,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 639 transitions, 10738 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:36,287 INFO L231 Difference]: Finished difference. Result has 409 places, 619 transitions, 9556 flow [2024-06-20 17:07:36,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9276, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9556, PETRI_PLACES=409, PETRI_TRANSITIONS=619} [2024-06-20 17:07:36,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-20 17:07:36,287 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 619 transitions, 9556 flow [2024-06-20 17:07:36,287 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 17:07:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:36,288 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 17:07:36,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:07:36,288 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 17:07:36,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1901105383, now seen corresponding path program 4 times [2024-06-20 17:07:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837792440] [2024-06-20 17:07:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:37,149 INFO 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 17:07:37,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837792440] [2024-06-20 17:07:37,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837792440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:37,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:37,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:37,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507170145] [2024-06-20 17:07:37,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:37,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:37,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:37,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:37,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 619 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 17:07:37,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:37,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:37,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:39,216 INFO L124 PetriNetUnfolderBase]: 4247/6769 cut-off events. [2024-06-20 17:07:39,216 INFO L125 PetriNetUnfolderBase]: For 808350/808350 co-relation queries the response was YES. [2024-06-20 17:07:39,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64904 conditions, 6769 events. 4247/6769 cut-off events. For 808350/808350 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42875 event pairs, 768 based on Foata normal form. 1/6768 useless extension candidates. Maximal degree in co-relation 64715. Up to 6424 conditions per place. [2024-06-20 17:07:39,316 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 593 selfloop transitions, 42 changer transitions 0/640 dead transitions. [2024-06-20 17:07:39,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 640 transitions, 11014 flow [2024-06-20 17:07:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:07:39,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 17:07:39,317 INFO L175 Difference]: Start difference. First operand has 409 places, 619 transitions, 9556 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:07:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 640 transitions, 11014 flow [2024-06-20 17:07:41,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 640 transitions, 10742 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:41,790 INFO L231 Difference]: Finished difference. Result has 414 places, 624 transitions, 9536 flow [2024-06-20 17:07:41,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9284, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9536, PETRI_PLACES=414, PETRI_TRANSITIONS=624} [2024-06-20 17:07:41,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 17:07:41,791 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 624 transitions, 9536 flow [2024-06-20 17:07:41,791 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 17:07:41,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:41,791 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 17:07:41,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:07:41,791 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 17:07:41,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:41,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1084659845, now seen corresponding path program 5 times [2024-06-20 17:07:41,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:41,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750293774] [2024-06-20 17:07:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:42,669 INFO 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 17:07:42,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750293774] [2024-06-20 17:07:42,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750293774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:42,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:42,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:42,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75348634] [2024-06-20 17:07:42,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:42,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:42,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:42,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:42,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:42,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 624 transitions, 9536 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 17:07:42,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:42,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:44,765 INFO L124 PetriNetUnfolderBase]: 4340/6900 cut-off events. [2024-06-20 17:07:44,765 INFO L125 PetriNetUnfolderBase]: For 880298/880298 co-relation queries the response was YES. [2024-06-20 17:07:44,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67555 conditions, 6900 events. 4340/6900 cut-off events. For 880298/880298 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43745 event pairs, 683 based on Foata normal form. 1/6894 useless extension candidates. Maximal degree in co-relation 67363. Up to 6063 conditions per place. [2024-06-20 17:07:44,871 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 518 selfloop transitions, 164 changer transitions 0/687 dead transitions. [2024-06-20 17:07:44,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 687 transitions, 12540 flow [2024-06-20 17:07:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 17:07:44,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:07:44,872 INFO L175 Difference]: Start difference. First operand has 414 places, 624 transitions, 9536 flow. Second operand 9 states and 180 transitions. [2024-06-20 17:07:44,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 687 transitions, 12540 flow [2024-06-20 17:07:47,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 687 transitions, 12382 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:47,389 INFO L231 Difference]: Finished difference. Result has 421 places, 655 transitions, 10583 flow [2024-06-20 17:07:47,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10583, PETRI_PLACES=421, PETRI_TRANSITIONS=655} [2024-06-20 17:07:47,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 17:07:47,390 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 655 transitions, 10583 flow [2024-06-20 17:07:47,390 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 17:07:47,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:47,390 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 17:07:47,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:07:47,390 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 17:07:47,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1625585005, now seen corresponding path program 6 times [2024-06-20 17:07:47,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:47,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129999885] [2024-06-20 17:07:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:47,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:48,282 INFO 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 17:07:48,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129999885] [2024-06-20 17:07:48,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129999885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:48,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:48,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2440988] [2024-06-20 17:07:48,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:48,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:48,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 655 transitions, 10583 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 17:07:48,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:48,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:48,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:50,305 INFO L124 PetriNetUnfolderBase]: 4345/6921 cut-off events. [2024-06-20 17:07:50,305 INFO L125 PetriNetUnfolderBase]: For 901639/901639 co-relation queries the response was YES. [2024-06-20 17:07:50,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68863 conditions, 6921 events. 4345/6921 cut-off events. For 901639/901639 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 43953 event pairs, 680 based on Foata normal form. 1/6916 useless extension candidates. Maximal degree in co-relation 68667. Up to 6131 conditions per place. [2024-06-20 17:07:50,436 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 533 selfloop transitions, 148 changer transitions 0/686 dead transitions. [2024-06-20 17:07:50,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 686 transitions, 12786 flow [2024-06-20 17:07:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:07:50,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 17:07:50,437 INFO L175 Difference]: Start difference. First operand has 421 places, 655 transitions, 10583 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:07:50,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 686 transitions, 12786 flow [2024-06-20 17:07:53,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 686 transitions, 12553 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:53,392 INFO L231 Difference]: Finished difference. Result has 427 places, 659 transitions, 10771 flow [2024-06-20 17:07:53,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10368, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10771, PETRI_PLACES=427, PETRI_TRANSITIONS=659} [2024-06-20 17:07:53,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 17:07:53,393 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 659 transitions, 10771 flow [2024-06-20 17:07:53,394 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 17:07:53,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:53,394 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 17:07:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:07:53,394 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 17:07:53,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1910594665, now seen corresponding path program 7 times [2024-06-20 17:07:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:53,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757525611] [2024-06-20 17:07:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:54,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:54,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757525611] [2024-06-20 17:07:54,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757525611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:54,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:54,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:54,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699359035] [2024-06-20 17:07:54,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:54,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:07:54,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 659 transitions, 10771 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 17:07:54,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:54,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:07:54,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:56,312 INFO L124 PetriNetUnfolderBase]: 4414/7021 cut-off events. [2024-06-20 17:07:56,312 INFO L125 PetriNetUnfolderBase]: For 960341/960341 co-relation queries the response was YES. [2024-06-20 17:07:56,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71475 conditions, 7021 events. 4414/7021 cut-off events. For 960341/960341 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 44622 event pairs, 681 based on Foata normal form. 1/7016 useless extension candidates. Maximal degree in co-relation 71277. Up to 5785 conditions per place. [2024-06-20 17:07:56,434 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 464 selfloop transitions, 240 changer transitions 0/709 dead transitions. [2024-06-20 17:07:56,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 709 transitions, 13706 flow [2024-06-20 17:07:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 17:07:56,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-20 17:07:56,435 INFO L175 Difference]: Start difference. First operand has 427 places, 659 transitions, 10771 flow. Second operand 9 states and 181 transitions. [2024-06-20 17:07:56,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 709 transitions, 13706 flow [2024-06-20 17:08:00,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 709 transitions, 13354 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:00,066 INFO L231 Difference]: Finished difference. Result has 432 places, 677 transitions, 11631 flow [2024-06-20 17:08:00,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10419, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11631, PETRI_PLACES=432, PETRI_TRANSITIONS=677} [2024-06-20 17:08:00,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 17:08:00,067 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 677 transitions, 11631 flow [2024-06-20 17:08:00,067 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 17:08:00,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:00,067 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 17:08:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:08:00,068 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 17:08:00,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1922974825, now seen corresponding path program 8 times [2024-06-20 17:08:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:00,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880854428] [2024-06-20 17:08:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:00,939 INFO 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 17:08:00,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:00,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880854428] [2024-06-20 17:08:00,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880854428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:00,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:00,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:00,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558925358] [2024-06-20 17:08:00,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:00,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:00,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:00,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:00,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:01,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:01,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 677 transitions, 11631 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 17:08:01,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:01,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:01,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:03,023 INFO L124 PetriNetUnfolderBase]: 4461/7091 cut-off events. [2024-06-20 17:08:03,023 INFO L125 PetriNetUnfolderBase]: For 995856/995856 co-relation queries the response was YES. [2024-06-20 17:08:03,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73364 conditions, 7091 events. 4461/7091 cut-off events. For 995856/995856 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 45130 event pairs, 687 based on Foata normal form. 3/7088 useless extension candidates. Maximal degree in co-relation 73163. Up to 5826 conditions per place. [2024-06-20 17:08:03,368 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 476 selfloop transitions, 237 changer transitions 0/718 dead transitions. [2024-06-20 17:08:03,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 718 transitions, 14287 flow [2024-06-20 17:08:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 17:08:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:08:03,369 INFO L175 Difference]: Start difference. First operand has 432 places, 677 transitions, 11631 flow. Second operand 9 states and 180 transitions. [2024-06-20 17:08:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 718 transitions, 14287 flow [2024-06-20 17:08:06,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 718 transitions, 13754 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:06,731 INFO L231 Difference]: Finished difference. Result has 437 places, 687 transitions, 11818 flow [2024-06-20 17:08:06,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11138, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11818, PETRI_PLACES=437, PETRI_TRANSITIONS=687} [2024-06-20 17:08:06,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-20 17:08:06,732 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 687 transitions, 11818 flow [2024-06-20 17:08:06,732 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 17:08:06,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:06,732 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 17:08:06,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:08:06,732 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 17:08:06,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2031053719, now seen corresponding path program 9 times [2024-06-20 17:08:06,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:06,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122781875] [2024-06-20 17:08:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:07,628 INFO 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 17:08:07,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:07,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122781875] [2024-06-20 17:08:07,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122781875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:07,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:07,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351359876] [2024-06-20 17:08:07,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:07,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:07,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:07,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:07,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 687 transitions, 11818 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 17:08:07,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:07,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:09,649 INFO L124 PetriNetUnfolderBase]: 4462/7099 cut-off events. [2024-06-20 17:08:09,649 INFO L125 PetriNetUnfolderBase]: For 997458/997458 co-relation queries the response was YES. [2024-06-20 17:08:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73433 conditions, 7099 events. 4462/7099 cut-off events. For 997458/997458 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 45206 event pairs, 694 based on Foata normal form. 1/7094 useless extension candidates. Maximal degree in co-relation 73230. Up to 6243 conditions per place. [2024-06-20 17:08:09,777 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 554 selfloop transitions, 167 changer transitions 0/726 dead transitions. [2024-06-20 17:08:09,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 726 transitions, 14464 flow [2024-06-20 17:08:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 17:08:09,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-20 17:08:09,778 INFO L175 Difference]: Start difference. First operand has 437 places, 687 transitions, 11818 flow. Second operand 9 states and 181 transitions. [2024-06-20 17:08:09,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 726 transitions, 14464 flow [2024-06-20 17:08:13,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 726 transitions, 14046 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:13,383 INFO L231 Difference]: Finished difference. Result has 443 places, 695 transitions, 12026 flow [2024-06-20 17:08:13,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11409, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12026, PETRI_PLACES=443, PETRI_TRANSITIONS=695} [2024-06-20 17:08:13,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-20 17:08:13,383 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 695 transitions, 12026 flow [2024-06-20 17:08:13,383 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 17:08:13,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:13,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:13,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:08:13,384 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 17:08:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2009666635, now seen corresponding path program 10 times [2024-06-20 17:08:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267049690] [2024-06-20 17:08:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:14,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:14,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267049690] [2024-06-20 17:08:14,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267049690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:14,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:14,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:14,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748378266] [2024-06-20 17:08:14,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:14,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:14,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:14,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:14,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 695 transitions, 12026 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 17:08:14,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:14,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:14,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:16,363 INFO L124 PetriNetUnfolderBase]: 4453/7081 cut-off events. [2024-06-20 17:08:16,363 INFO L125 PetriNetUnfolderBase]: For 1007338/1007338 co-relation queries the response was YES. [2024-06-20 17:08:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72917 conditions, 7081 events. 4453/7081 cut-off events. For 1007338/1007338 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 45059 event pairs, 684 based on Foata normal form. 3/7078 useless extension candidates. Maximal degree in co-relation 72711. Up to 6214 conditions per place. [2024-06-20 17:08:16,485 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 558 selfloop transitions, 157 changer transitions 0/720 dead transitions. [2024-06-20 17:08:16,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 720 transitions, 14212 flow [2024-06-20 17:08:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 17:08:16,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-20 17:08:16,486 INFO L175 Difference]: Start difference. First operand has 443 places, 695 transitions, 12026 flow. Second operand 9 states and 175 transitions. [2024-06-20 17:08:16,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 720 transitions, 14212 flow [2024-06-20 17:08:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 720 transitions, 13684 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:20,032 INFO L231 Difference]: Finished difference. Result has 445 places, 695 transitions, 11820 flow [2024-06-20 17:08:20,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11498, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11820, PETRI_PLACES=445, PETRI_TRANSITIONS=695} [2024-06-20 17:08:20,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-20 17:08:20,033 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 695 transitions, 11820 flow [2024-06-20 17:08:20,033 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 17:08:20,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:20,033 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 17:08:20,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:08:20,033 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 17:08:20,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2009369965, now seen corresponding path program 11 times [2024-06-20 17:08:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:20,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636484228] [2024-06-20 17:08:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:21,100 INFO 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 17:08:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636484228] [2024-06-20 17:08:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636484228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:21,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:21,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434377678] [2024-06-20 17:08:21,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:21,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:21,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 695 transitions, 11820 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 17:08:21,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:21,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:23,202 INFO L124 PetriNetUnfolderBase]: 4444/7071 cut-off events. [2024-06-20 17:08:23,202 INFO L125 PetriNetUnfolderBase]: For 1004833/1004833 co-relation queries the response was YES. [2024-06-20 17:08:23,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71654 conditions, 7071 events. 4444/7071 cut-off events. For 1004833/1004833 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 45019 event pairs, 693 based on Foata normal form. 3/7068 useless extension candidates. Maximal degree in co-relation 71451. Up to 5887 conditions per place. [2024-06-20 17:08:23,329 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 523 selfloop transitions, 189 changer transitions 0/717 dead transitions. [2024-06-20 17:08:23,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 717 transitions, 13774 flow [2024-06-20 17:08:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 17:08:23,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 17:08:23,330 INFO L175 Difference]: Start difference. First operand has 445 places, 695 transitions, 11820 flow. Second operand 8 states and 159 transitions. [2024-06-20 17:08:23,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 717 transitions, 13774 flow [2024-06-20 17:08:27,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 717 transitions, 13273 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:27,334 INFO L231 Difference]: Finished difference. Result has 446 places, 695 transitions, 11720 flow [2024-06-20 17:08:27,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11319, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11720, PETRI_PLACES=446, PETRI_TRANSITIONS=695} [2024-06-20 17:08:27,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 17:08:27,335 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 695 transitions, 11720 flow [2024-06-20 17:08:27,335 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 17:08:27,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:27,335 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 17:08:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:08:27,335 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 17:08:27,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1723168837, now seen corresponding path program 12 times [2024-06-20 17:08:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:27,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800894357] [2024-06-20 17:08:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:28,348 INFO 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 17:08:28,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:28,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800894357] [2024-06-20 17:08:28,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800894357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:28,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:28,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131600581] [2024-06-20 17:08:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:28,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:28,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:28,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 695 transitions, 11720 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 17:08:28,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:28,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:28,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:30,455 INFO L124 PetriNetUnfolderBase]: 4484/7127 cut-off events. [2024-06-20 17:08:30,455 INFO L125 PetriNetUnfolderBase]: For 1029441/1029441 co-relation queries the response was YES. [2024-06-20 17:08:30,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72865 conditions, 7127 events. 4484/7127 cut-off events. For 1029441/1029441 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 45409 event pairs, 718 based on Foata normal form. 1/7119 useless extension candidates. Maximal degree in co-relation 72662. Up to 5747 conditions per place. [2024-06-20 17:08:30,582 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 488 selfloop transitions, 239 changer transitions 0/732 dead transitions. [2024-06-20 17:08:30,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 732 transitions, 14191 flow [2024-06-20 17:08:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 17:08:30,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-20 17:08:30,584 INFO L175 Difference]: Start difference. First operand has 446 places, 695 transitions, 11720 flow. Second operand 8 states and 165 transitions. [2024-06-20 17:08:30,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 732 transitions, 14191 flow [2024-06-20 17:08:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 732 transitions, 13726 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:34,946 INFO L231 Difference]: Finished difference. Result has 448 places, 703 transitions, 12104 flow [2024-06-20 17:08:34,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11267, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12104, PETRI_PLACES=448, PETRI_TRANSITIONS=703} [2024-06-20 17:08:34,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 17:08:34,947 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 703 transitions, 12104 flow [2024-06-20 17:08:34,947 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 17:08:34,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:34,947 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 17:08:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:08:34,947 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 17:08:34,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2027244439, now seen corresponding path program 13 times [2024-06-20 17:08:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:34,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515309132] [2024-06-20 17:08:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:35,926 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 17:08:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:35,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515309132] [2024-06-20 17:08:35,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515309132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:35,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:35,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280171117] [2024-06-20 17:08:35,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:35,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:35,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:35,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:35,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:36,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:36,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 703 transitions, 12104 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 17:08:36,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:36,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:36,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:38,246 INFO L124 PetriNetUnfolderBase]: 4494/7139 cut-off events. [2024-06-20 17:08:38,246 INFO L125 PetriNetUnfolderBase]: For 1031913/1031913 co-relation queries the response was YES. [2024-06-20 17:08:38,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74122 conditions, 7139 events. 4494/7139 cut-off events. For 1031913/1031913 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 45477 event pairs, 706 based on Foata normal form. 2/7135 useless extension candidates. Maximal degree in co-relation 73919. Up to 6515 conditions per place. [2024-06-20 17:08:38,377 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 627 selfloop transitions, 98 changer transitions 0/730 dead transitions. [2024-06-20 17:08:38,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 730 transitions, 13892 flow [2024-06-20 17:08:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:08:38,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:08:38,378 INFO L175 Difference]: Start difference. First operand has 448 places, 703 transitions, 12104 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:08:38,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 730 transitions, 13892 flow [2024-06-20 17:08:42,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 730 transitions, 13687 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:42,228 INFO L231 Difference]: Finished difference. Result has 453 places, 709 transitions, 12354 flow [2024-06-20 17:08:42,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11903, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12354, PETRI_PLACES=453, PETRI_TRANSITIONS=709} [2024-06-20 17:08:42,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-20 17:08:42,229 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 709 transitions, 12354 flow [2024-06-20 17:08:42,229 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 17:08:42,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:42,229 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 17:08:42,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:08:42,229 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 17:08:42,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1288428939, now seen corresponding path program 14 times [2024-06-20 17:08:42,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:42,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237727840] [2024-06-20 17:08:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:43,205 INFO 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 17:08:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:43,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237727840] [2024-06-20 17:08:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237727840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:43,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:43,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343204073] [2024-06-20 17:08:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:43,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:43,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:43,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:43,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 709 transitions, 12354 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 17:08:43,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:43,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:43,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:45,384 INFO L124 PetriNetUnfolderBase]: 4500/7142 cut-off events. [2024-06-20 17:08:45,384 INFO L125 PetriNetUnfolderBase]: For 1047733/1047733 co-relation queries the response was YES. [2024-06-20 17:08:45,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74098 conditions, 7142 events. 4500/7142 cut-off events. For 1047733/1047733 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 45398 event pairs, 718 based on Foata normal form. 6/7142 useless extension candidates. Maximal degree in co-relation 73895. Up to 6381 conditions per place. [2024-06-20 17:08:45,528 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 605 selfloop transitions, 122 changer transitions 0/732 dead transitions. [2024-06-20 17:08:45,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 732 transitions, 14084 flow [2024-06-20 17:08:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:08:45,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:08:45,529 INFO L175 Difference]: Start difference. First operand has 453 places, 709 transitions, 12354 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:08:45,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 732 transitions, 14084 flow [2024-06-20 17:08:49,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 732 transitions, 13710 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:49,346 INFO L231 Difference]: Finished difference. Result has 455 places, 713 transitions, 12422 flow [2024-06-20 17:08:49,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11980, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12422, PETRI_PLACES=455, PETRI_TRANSITIONS=713} [2024-06-20 17:08:49,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 17:08:49,347 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 713 transitions, 12422 flow [2024-06-20 17:08:49,347 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 17:08:49,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:49,347 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 17:08:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:08:49,347 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 17:08:49,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1280154729, now seen corresponding path program 15 times [2024-06-20 17:08:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:49,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301168779] [2024-06-20 17:08:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:49,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:50,326 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 17:08:50,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:50,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301168779] [2024-06-20 17:08:50,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301168779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:50,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:50,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:50,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033019391] [2024-06-20 17:08:50,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:50,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:50,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:50,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 713 transitions, 12422 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 17:08:50,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:50,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:50,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:52,954 INFO L124 PetriNetUnfolderBase]: 4506/7159 cut-off events. [2024-06-20 17:08:52,954 INFO L125 PetriNetUnfolderBase]: For 1056198/1056198 co-relation queries the response was YES. [2024-06-20 17:08:53,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74748 conditions, 7159 events. 4506/7159 cut-off events. For 1056198/1056198 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 45625 event pairs, 714 based on Foata normal form. 6/7159 useless extension candidates. Maximal degree in co-relation 74544. Up to 6390 conditions per place. [2024-06-20 17:08:53,093 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 609 selfloop transitions, 128 changer transitions 0/742 dead transitions. [2024-06-20 17:08:53,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 742 transitions, 14237 flow [2024-06-20 17:08:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:08:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:08:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-20 17:08:53,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 17:08:53,095 INFO L175 Difference]: Start difference. First operand has 455 places, 713 transitions, 12422 flow. Second operand 11 states and 205 transitions. [2024-06-20 17:08:53,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 742 transitions, 14237 flow [2024-06-20 17:08:56,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 742 transitions, 13773 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:56,981 INFO L231 Difference]: Finished difference. Result has 459 places, 717 transitions, 12420 flow [2024-06-20 17:08:56,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11958, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12420, PETRI_PLACES=459, PETRI_TRANSITIONS=717} [2024-06-20 17:08:56,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 17:08:56,982 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 717 transitions, 12420 flow [2024-06-20 17:08:56,982 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 17:08:56,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:56,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:56,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:08:56,982 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 17:08:56,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1288725609, now seen corresponding path program 16 times [2024-06-20 17:08:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:56,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022631120] [2024-06-20 17:08:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:56,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:57,926 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 17:08:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022631120] [2024-06-20 17:08:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022631120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:57,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:57,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512201335] [2024-06-20 17:08:57,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:57,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:57,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:08:57,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 717 transitions, 12420 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 17:08:57,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:57,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:08:57,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:00,103 INFO L124 PetriNetUnfolderBase]: 4493/7124 cut-off events. [2024-06-20 17:09:00,103 INFO L125 PetriNetUnfolderBase]: For 1037968/1037968 co-relation queries the response was YES. [2024-06-20 17:09:00,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74540 conditions, 7124 events. 4493/7124 cut-off events. For 1037968/1037968 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 45220 event pairs, 718 based on Foata normal form. 3/7121 useless extension candidates. Maximal degree in co-relation 74335. Up to 6451 conditions per place. [2024-06-20 17:09:00,234 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 620 selfloop transitions, 112 changer transitions 0/737 dead transitions. [2024-06-20 17:09:00,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 737 transitions, 14204 flow [2024-06-20 17:09:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:09:00,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:09:00,235 INFO L175 Difference]: Start difference. First operand has 459 places, 717 transitions, 12420 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:09:00,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 737 transitions, 14204 flow [2024-06-20 17:09:04,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 737 transitions, 13660 flow, removed 149 selfloop flow, removed 9 redundant places. [2024-06-20 17:09:04,069 INFO L231 Difference]: Finished difference. Result has 459 places, 717 transitions, 12110 flow [2024-06-20 17:09:04,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11876, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12110, PETRI_PLACES=459, PETRI_TRANSITIONS=717} [2024-06-20 17:09:04,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 17:09:04,069 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 717 transitions, 12110 flow [2024-06-20 17:09:04,069 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 17:09:04,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:04,069 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 17:09:04,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:09:04,070 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 17:09:04,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash -701213109, now seen corresponding path program 17 times [2024-06-20 17:09:04,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:04,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602162963] [2024-06-20 17:09:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:04,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:04,991 INFO 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 17:09:04,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602162963] [2024-06-20 17:09:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602162963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:04,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987361565] [2024-06-20 17:09:04,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:05,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:05,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 717 transitions, 12110 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 17:09:05,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:05,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:05,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:07,239 INFO L124 PetriNetUnfolderBase]: 4499/7138 cut-off events. [2024-06-20 17:09:07,240 INFO L125 PetriNetUnfolderBase]: For 1050754/1050754 co-relation queries the response was YES. [2024-06-20 17:09:07,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74022 conditions, 7138 events. 4499/7138 cut-off events. For 1050754/1050754 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 45320 event pairs, 786 based on Foata normal form. 6/7142 useless extension candidates. Maximal degree in co-relation 73816. Up to 6544 conditions per place. [2024-06-20 17:09:07,369 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 638 selfloop transitions, 105 changer transitions 0/748 dead transitions. [2024-06-20 17:09:07,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 748 transitions, 13898 flow [2024-06-20 17:09:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-20 17:09:07,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 17:09:07,370 INFO L175 Difference]: Start difference. First operand has 459 places, 717 transitions, 12110 flow. Second operand 8 states and 164 transitions. [2024-06-20 17:09:07,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 748 transitions, 13898 flow [2024-06-20 17:09:11,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 748 transitions, 13702 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:11,116 INFO L231 Difference]: Finished difference. Result has 461 places, 721 transitions, 12358 flow [2024-06-20 17:09:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11914, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12358, PETRI_PLACES=461, PETRI_TRANSITIONS=721} [2024-06-20 17:09:11,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-20 17:09:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 721 transitions, 12358 flow [2024-06-20 17:09:11,116 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 17:09:11,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:11,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:09:11,117 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 17:09:11,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1537453141, now seen corresponding path program 18 times [2024-06-20 17:09:11,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:11,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578730389] [2024-06-20 17:09:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:12,140 INFO 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 17:09:12,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:12,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578730389] [2024-06-20 17:09:12,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578730389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:12,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:12,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:12,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967863911] [2024-06-20 17:09:12,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:12,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:12,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:12,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 721 transitions, 12358 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 17:09:12,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:12,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:14,287 INFO L124 PetriNetUnfolderBase]: 4490/7107 cut-off events. [2024-06-20 17:09:14,287 INFO L125 PetriNetUnfolderBase]: For 1037392/1037392 co-relation queries the response was YES. [2024-06-20 17:09:14,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74232 conditions, 7107 events. 4490/7107 cut-off events. For 1037392/1037392 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 45065 event pairs, 763 based on Foata normal form. 3/7103 useless extension candidates. Maximal degree in co-relation 74025. Up to 6517 conditions per place. [2024-06-20 17:09:14,420 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 653 selfloop transitions, 89 changer transitions 0/747 dead transitions. [2024-06-20 17:09:14,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 747 transitions, 13956 flow [2024-06-20 17:09:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 17:09:14,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-20 17:09:14,421 INFO L175 Difference]: Start difference. First operand has 461 places, 721 transitions, 12358 flow. Second operand 8 states and 162 transitions. [2024-06-20 17:09:14,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 747 transitions, 13956 flow [2024-06-20 17:09:18,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 747 transitions, 13460 flow, removed 158 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:18,932 INFO L231 Difference]: Finished difference. Result has 463 places, 721 transitions, 12051 flow [2024-06-20 17:09:18,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11862, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12051, PETRI_PLACES=463, PETRI_TRANSITIONS=721} [2024-06-20 17:09:18,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-20 17:09:18,933 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 721 transitions, 12051 flow [2024-06-20 17:09:18,933 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 17:09:18,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:18,933 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 17:09:18,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:09:18,934 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 17:09:18,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash 673080005, now seen corresponding path program 19 times [2024-06-20 17:09:18,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:18,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035934407] [2024-06-20 17:09:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:18,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:19,868 INFO 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 17:09:19,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:19,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035934407] [2024-06-20 17:09:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035934407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:19,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864399203] [2024-06-20 17:09:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:19,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:19,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 721 transitions, 12051 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 17:09:19,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:19,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:19,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:22,083 INFO L124 PetriNetUnfolderBase]: 4496/7130 cut-off events. [2024-06-20 17:09:22,083 INFO L125 PetriNetUnfolderBase]: For 1039061/1039061 co-relation queries the response was YES. [2024-06-20 17:09:22,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73659 conditions, 7130 events. 4496/7130 cut-off events. For 1039061/1039061 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 45370 event pairs, 748 based on Foata normal form. 6/7130 useless extension candidates. Maximal degree in co-relation 73451. Up to 6264 conditions per place. [2024-06-20 17:09:22,268 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 587 selfloop transitions, 159 changer transitions 0/751 dead transitions. [2024-06-20 17:09:22,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 751 transitions, 13859 flow [2024-06-20 17:09:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 17:09:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-20 17:09:22,270 INFO L175 Difference]: Start difference. First operand has 463 places, 721 transitions, 12051 flow. Second operand 8 states and 165 transitions. [2024-06-20 17:09:22,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 751 transitions, 13859 flow [2024-06-20 17:09:26,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 751 transitions, 13727 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:26,636 INFO L231 Difference]: Finished difference. Result has 468 places, 725 transitions, 12467 flow [2024-06-20 17:09:26,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11919, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12467, PETRI_PLACES=468, PETRI_TRANSITIONS=725} [2024-06-20 17:09:26,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 17:09:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 725 transitions, 12467 flow [2024-06-20 17:09:26,637 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 17:09:26,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:26,637 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 17:09:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:09:26,637 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 17:09:26,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash -307493715, now seen corresponding path program 1 times [2024-06-20 17:09:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:26,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560868681] [2024-06-20 17:09:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560868681] [2024-06-20 17:09:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560868681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:27,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:27,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841764112] [2024-06-20 17:09:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:27,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:27,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:27,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 725 transitions, 12467 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 17:09:27,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:27,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:27,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:29,486 INFO L124 PetriNetUnfolderBase]: 4498/7144 cut-off events. [2024-06-20 17:09:29,486 INFO L125 PetriNetUnfolderBase]: For 1032574/1032574 co-relation queries the response was YES. [2024-06-20 17:09:29,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74574 conditions, 7144 events. 4498/7144 cut-off events. For 1032574/1032574 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 45437 event pairs, 783 based on Foata normal form. 2/7144 useless extension candidates. Maximal degree in co-relation 74365. Up to 6618 conditions per place. [2024-06-20 17:09:29,624 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 667 selfloop transitions, 74 changer transitions 0/746 dead transitions. [2024-06-20 17:09:29,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 746 transitions, 14147 flow [2024-06-20 17:09:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:09:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:09:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 17:09:29,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-20 17:09:29,625 INFO L175 Difference]: Start difference. First operand has 468 places, 725 transitions, 12467 flow. Second operand 6 states and 126 transitions. [2024-06-20 17:09:29,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 746 transitions, 14147 flow [2024-06-20 17:09:33,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 746 transitions, 13534 flow, removed 165 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:33,963 INFO L231 Difference]: Finished difference. Result has 469 places, 728 transitions, 12193 flow [2024-06-20 17:09:33,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11854, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12193, PETRI_PLACES=469, PETRI_TRANSITIONS=728} [2024-06-20 17:09:33,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 17:09:33,963 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 728 transitions, 12193 flow [2024-06-20 17:09:33,964 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 17:09:33,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:33,964 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 17:09:33,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:09:33,964 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 17:09:33,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 673376675, now seen corresponding path program 20 times [2024-06-20 17:09:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134170192] [2024-06-20 17:09:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:34,840 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 17:09:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134170192] [2024-06-20 17:09:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134170192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:34,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:34,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:34,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318507221] [2024-06-20 17:09:34,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:34,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:34,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:34,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:34,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 728 transitions, 12193 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 17:09:34,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:34,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:34,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:36,952 INFO L124 PetriNetUnfolderBase]: 4484/7104 cut-off events. [2024-06-20 17:09:36,952 INFO L125 PetriNetUnfolderBase]: For 1029681/1029681 co-relation queries the response was YES. [2024-06-20 17:09:37,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73565 conditions, 7104 events. 4484/7104 cut-off events. For 1029681/1029681 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 45041 event pairs, 751 based on Foata normal form. 4/7101 useless extension candidates. Maximal degree in co-relation 73355. Up to 6277 conditions per place. [2024-06-20 17:09:37,089 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 584 selfloop transitions, 168 changer transitions 0/757 dead transitions. [2024-06-20 17:09:37,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 757 transitions, 14501 flow [2024-06-20 17:09:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 17:09:37,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-20 17:09:37,090 INFO L175 Difference]: Start difference. First operand has 469 places, 728 transitions, 12193 flow. Second operand 8 states and 166 transitions. [2024-06-20 17:09:37,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 757 transitions, 14501 flow [2024-06-20 17:09:40,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 757 transitions, 14214 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-20 17:09:40,875 INFO L231 Difference]: Finished difference. Result has 473 places, 728 transitions, 12261 flow [2024-06-20 17:09:40,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11906, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12261, PETRI_PLACES=473, PETRI_TRANSITIONS=728} [2024-06-20 17:09:40,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:09:40,876 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 728 transitions, 12261 flow [2024-06-20 17:09:40,876 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 17:09:40,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:40,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:40,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:09:40,877 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 17:09:40,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 155868555, now seen corresponding path program 2 times [2024-06-20 17:09:40,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:40,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640500324] [2024-06-20 17:09:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:41,666 INFO 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 17:09:41,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:41,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640500324] [2024-06-20 17:09:41,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640500324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:41,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:41,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:41,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530294921] [2024-06-20 17:09:41,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:41,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:41,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 728 transitions, 12261 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 17:09:41,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:41,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:41,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:43,664 INFO L124 PetriNetUnfolderBase]: 4478/7105 cut-off events. [2024-06-20 17:09:43,665 INFO L125 PetriNetUnfolderBase]: For 1021434/1021434 co-relation queries the response was YES. [2024-06-20 17:09:43,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73585 conditions, 7105 events. 4478/7105 cut-off events. For 1021434/1021434 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 45144 event pairs, 710 based on Foata normal form. 2/7098 useless extension candidates. Maximal degree in co-relation 73374. Up to 6387 conditions per place. [2024-06-20 17:09:43,796 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 619 selfloop transitions, 124 changer transitions 0/748 dead transitions. [2024-06-20 17:09:43,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 748 transitions, 13957 flow [2024-06-20 17:09:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:09:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:09:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-20 17:09:43,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-20 17:09:43,798 INFO L175 Difference]: Start difference. First operand has 473 places, 728 transitions, 12261 flow. Second operand 6 states and 124 transitions. [2024-06-20 17:09:43,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 748 transitions, 13957 flow [2024-06-20 17:09:48,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 748 transitions, 13644 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:48,155 INFO L231 Difference]: Finished difference. Result has 473 places, 731 transitions, 12378 flow [2024-06-20 17:09:48,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11948, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12378, PETRI_PLACES=473, PETRI_TRANSITIONS=731} [2024-06-20 17:09:48,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:09:48,156 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 731 transitions, 12378 flow [2024-06-20 17:09:48,156 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 17:09:48,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:48,156 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 17:09:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:09:48,156 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 17:09:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1380276930, now seen corresponding path program 1 times [2024-06-20 17:09:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418460454] [2024-06-20 17:09:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:49,105 INFO 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 17:09:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418460454] [2024-06-20 17:09:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418460454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:49,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:49,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:09:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021866771] [2024-06-20 17:09:49,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:09:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:09:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:09:49,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:49,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 731 transitions, 12378 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 17:09:49,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:49,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:49,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:51,410 INFO L124 PetriNetUnfolderBase]: 4669/7424 cut-off events. [2024-06-20 17:09:51,410 INFO L125 PetriNetUnfolderBase]: For 1267228/1267228 co-relation queries the response was YES. [2024-06-20 17:09:51,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79728 conditions, 7424 events. 4669/7424 cut-off events. For 1267228/1267228 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 47575 event pairs, 596 based on Foata normal form. 16/7434 useless extension candidates. Maximal degree in co-relation 79516. Up to 5465 conditions per place. [2024-06-20 17:09:51,553 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 523 selfloop transitions, 254 changer transitions 0/782 dead transitions. [2024-06-20 17:09:51,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 782 transitions, 15508 flow [2024-06-20 17:09:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:09:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:09:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 17:09:51,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 17:09:51,554 INFO L175 Difference]: Start difference. First operand has 473 places, 731 transitions, 12378 flow. Second operand 10 states and 205 transitions. [2024-06-20 17:09:51,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 782 transitions, 15508 flow [2024-06-20 17:09:56,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 782 transitions, 15170 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 17:09:56,678 INFO L231 Difference]: Finished difference. Result has 480 places, 736 transitions, 12756 flow [2024-06-20 17:09:56,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12756, PETRI_PLACES=480, PETRI_TRANSITIONS=736} [2024-06-20 17:09:56,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 17:09:56,679 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 736 transitions, 12756 flow [2024-06-20 17:09:56,679 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 17:09:56,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:56,679 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 17:09:56,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:09:56,679 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 17:09:56,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1922989550, now seen corresponding path program 2 times [2024-06-20 17:09:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:56,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63507808] [2024-06-20 17:09:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:57,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63507808] [2024-06-20 17:09:57,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63507808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:57,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:57,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:09:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204242223] [2024-06-20 17:09:57,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:09:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:09:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:09:57,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:09:57,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 736 transitions, 12756 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 17:09:57,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:57,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:09:57,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:00,477 INFO L124 PetriNetUnfolderBase]: 5034/8009 cut-off events. [2024-06-20 17:10:00,477 INFO L125 PetriNetUnfolderBase]: For 1815612/1815612 co-relation queries the response was YES. [2024-06-20 17:10:00,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89499 conditions, 8009 events. 5034/8009 cut-off events. For 1815612/1815612 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 51596 event pairs, 846 based on Foata normal form. 82/8085 useless extension candidates. Maximal degree in co-relation 89285. Up to 5761 conditions per place. [2024-06-20 17:10:00,645 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 416 selfloop transitions, 360 changer transitions 9/790 dead transitions. [2024-06-20 17:10:00,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 790 transitions, 15878 flow [2024-06-20 17:10:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:10:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:10:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-20 17:10:00,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48577235772357724 [2024-06-20 17:10:00,646 INFO L175 Difference]: Start difference. First operand has 480 places, 736 transitions, 12756 flow. Second operand 12 states and 239 transitions. [2024-06-20 17:10:00,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 790 transitions, 15878 flow [2024-06-20 17:10:06,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 790 transitions, 15405 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:06,131 INFO L231 Difference]: Finished difference. Result has 488 places, 743 transitions, 13868 flow [2024-06-20 17:10:06,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12289, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13868, PETRI_PLACES=488, PETRI_TRANSITIONS=743} [2024-06-20 17:10:06,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-20 17:10:06,132 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 743 transitions, 13868 flow [2024-06-20 17:10:06,132 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 17:10:06,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:06,132 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 17:10:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:10:06,132 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 17:10:06,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1382150880, now seen corresponding path program 3 times [2024-06-20 17:10:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:06,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764614362] [2024-06-20 17:10:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:07,316 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 17:10:07,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:07,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764614362] [2024-06-20 17:10:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764614362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:07,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253668622] [2024-06-20 17:10:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:07,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:10:07,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 743 transitions, 13868 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 17:10:07,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:07,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:10:07,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:10,589 INFO L124 PetriNetUnfolderBase]: 5615/8958 cut-off events. [2024-06-20 17:10:10,589 INFO L125 PetriNetUnfolderBase]: For 2237678/2237678 co-relation queries the response was YES. [2024-06-20 17:10:10,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110655 conditions, 8958 events. 5615/8958 cut-off events. For 2237678/2237678 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 58579 event pairs, 1012 based on Foata normal form. 56/9008 useless extension candidates. Maximal degree in co-relation 110438. Up to 5714 conditions per place. [2024-06-20 17:10:10,751 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 446 selfloop transitions, 344 changer transitions 0/795 dead transitions. [2024-06-20 17:10:10,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 795 transitions, 16994 flow [2024-06-20 17:10:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:10:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:10:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-20 17:10:10,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-20 17:10:10,752 INFO L175 Difference]: Start difference. First operand has 488 places, 743 transitions, 13868 flow. Second operand 11 states and 227 transitions. [2024-06-20 17:10:10,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 795 transitions, 16994 flow [2024-06-20 17:10:16,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 795 transitions, 16287 flow, removed 222 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:16,936 INFO L231 Difference]: Finished difference. Result has 493 places, 748 transitions, 14106 flow [2024-06-20 17:10:16,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13169, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14106, PETRI_PLACES=493, PETRI_TRANSITIONS=748} [2024-06-20 17:10:16,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 17:10:16,937 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 748 transitions, 14106 flow [2024-06-20 17:10:16,937 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 17:10:16,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:16,937 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 17:10:16,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:10:16,937 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 17:10:16,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1294454626, now seen corresponding path program 1 times [2024-06-20 17:10:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:16,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333817392] [2024-06-20 17:10:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:16,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:17,958 INFO 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 17:10:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:17,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333817392] [2024-06-20 17:10:17,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333817392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:17,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:17,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:17,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976525029] [2024-06-20 17:10:17,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:17,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:18,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:10:18,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 748 transitions, 14106 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 17:10:18,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:18,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:10:18,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:21,189 INFO L124 PetriNetUnfolderBase]: 5661/9018 cut-off events. [2024-06-20 17:10:21,189 INFO L125 PetriNetUnfolderBase]: For 1946304/1946304 co-relation queries the response was YES. [2024-06-20 17:10:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108731 conditions, 9018 events. 5661/9018 cut-off events. For 1946304/1946304 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 59020 event pairs, 1220 based on Foata normal form. 16/9025 useless extension candidates. Maximal degree in co-relation 108512. Up to 8105 conditions per place. [2024-06-20 17:10:21,382 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 619 selfloop transitions, 158 changer transitions 0/782 dead transitions. [2024-06-20 17:10:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 782 transitions, 16346 flow [2024-06-20 17:10:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:10:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:10:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-20 17:10:21,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656319290465632 [2024-06-20 17:10:21,383 INFO L175 Difference]: Start difference. First operand has 493 places, 748 transitions, 14106 flow. Second operand 11 states and 210 transitions. [2024-06-20 17:10:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 782 transitions, 16346 flow [2024-06-20 17:10:27,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 782 transitions, 15829 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:28,000 INFO L231 Difference]: Finished difference. Result has 498 places, 752 transitions, 14098 flow [2024-06-20 17:10:28,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13589, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14098, PETRI_PLACES=498, PETRI_TRANSITIONS=752} [2024-06-20 17:10:28,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-20 17:10:28,001 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 752 transitions, 14098 flow [2024-06-20 17:10:28,001 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 17:10:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:28,001 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 17:10:28,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:10:28,002 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 17:10:28,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 753627116, now seen corresponding path program 2 times [2024-06-20 17:10:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650080486] [2024-06-20 17:10:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:28,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:29,101 INFO 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 17:10:29,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:29,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650080486] [2024-06-20 17:10:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650080486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:29,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699364473] [2024-06-20 17:10:29,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:29,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:29,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:10:29,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 752 transitions, 14098 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 17:10:29,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:29,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:10:29,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:32,638 INFO L124 PetriNetUnfolderBase]: 5798/9231 cut-off events. [2024-06-20 17:10:32,639 INFO L125 PetriNetUnfolderBase]: For 2084201/2084201 co-relation queries the response was YES. [2024-06-20 17:10:32,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113324 conditions, 9231 events. 5798/9231 cut-off events. For 2084201/2084201 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 60537 event pairs, 1243 based on Foata normal form. 14/9236 useless extension candidates. Maximal degree in co-relation 113102. Up to 8074 conditions per place. [2024-06-20 17:10:32,813 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 623 selfloop transitions, 164 changer transitions 0/792 dead transitions. [2024-06-20 17:10:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 792 transitions, 16798 flow [2024-06-20 17:10:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:10:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:10:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 17:10:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722838137472284 [2024-06-20 17:10:32,814 INFO L175 Difference]: Start difference. First operand has 498 places, 752 transitions, 14098 flow. Second operand 11 states and 213 transitions. [2024-06-20 17:10:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 792 transitions, 16798 flow [2024-06-20 17:10:39,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 792 transitions, 16351 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-20 17:10:39,067 INFO L231 Difference]: Finished difference. Result has 500 places, 756 transitions, 14200 flow [2024-06-20 17:10:39,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13655, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14200, PETRI_PLACES=500, PETRI_TRANSITIONS=756} [2024-06-20 17:10:39,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-20 17:10:39,068 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 756 transitions, 14200 flow [2024-06-20 17:10:39,068 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 17:10:39,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:39,068 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 17:10:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:10:39,068 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 17:10:39,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 753411914, now seen corresponding path program 4 times [2024-06-20 17:10:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82693929] [2024-06-20 17:10:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:40,127 INFO 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 17:10:40,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:40,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82693929] [2024-06-20 17:10:40,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82693929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:40,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:40,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518363593] [2024-06-20 17:10:40,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:40,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:40,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:40,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:10:40,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 756 transitions, 14200 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 17:10:40,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:40,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:10:40,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:43,793 INFO L124 PetriNetUnfolderBase]: 5870/9345 cut-off events. [2024-06-20 17:10:43,793 INFO L125 PetriNetUnfolderBase]: For 2136160/2136160 co-relation queries the response was YES. [2024-06-20 17:10:43,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114662 conditions, 9345 events. 5870/9345 cut-off events. For 2136160/2136160 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 61357 event pairs, 1323 based on Foata normal form. 20/9359 useless extension candidates. Maximal degree in co-relation 114440. Up to 8647 conditions per place. [2024-06-20 17:10:43,981 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 680 selfloop transitions, 102 changer transitions 0/787 dead transitions. [2024-06-20 17:10:43,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 787 transitions, 16098 flow [2024-06-20 17:10:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:10:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:10:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-20 17:10:43,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410569105691057 [2024-06-20 17:10:43,982 INFO L175 Difference]: Start difference. First operand has 500 places, 756 transitions, 14200 flow. Second operand 12 states and 217 transitions. [2024-06-20 17:10:43,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 787 transitions, 16098 flow [2024-06-20 17:10:51,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 787 transitions, 15794 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:51,801 INFO L231 Difference]: Finished difference. Result has 505 places, 758 transitions, 14202 flow [2024-06-20 17:10:51,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13896, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14202, PETRI_PLACES=505, PETRI_TRANSITIONS=758} [2024-06-20 17:10:51,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-20 17:10:51,801 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 758 transitions, 14202 flow [2024-06-20 17:10:51,801 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 17:10:51,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:51,801 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 17:10:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:10:51,802 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 17:10:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 747905384, now seen corresponding path program 5 times [2024-06-20 17:10:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967314974] [2024-06-20 17:10:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:51,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:52,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:52,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967314974] [2024-06-20 17:10:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967314974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:52,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:52,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146798039] [2024-06-20 17:10:52,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:52,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:52,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:52,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:10:52,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 758 transitions, 14202 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 17:10:52,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:52,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:10:52,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:56,436 INFO L124 PetriNetUnfolderBase]: 5942/9465 cut-off events. [2024-06-20 17:10:56,436 INFO L125 PetriNetUnfolderBase]: For 2177647/2177647 co-relation queries the response was YES. [2024-06-20 17:10:56,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116253 conditions, 9465 events. 5942/9465 cut-off events. For 2177647/2177647 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 62219 event pairs, 1327 based on Foata normal form. 20/9479 useless extension candidates. Maximal degree in co-relation 116029. Up to 8673 conditions per place. [2024-06-20 17:10:56,613 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 664 selfloop transitions, 116 changer transitions 0/785 dead transitions. [2024-06-20 17:10:56,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 785 transitions, 16072 flow [2024-06-20 17:10:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 17:10:56,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-20 17:10:56,614 INFO L175 Difference]: Start difference. First operand has 505 places, 758 transitions, 14202 flow. Second operand 10 states and 186 transitions. [2024-06-20 17:10:56,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 785 transitions, 16072 flow [2024-06-20 17:11:04,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 785 transitions, 15831 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-20 17:11:04,494 INFO L231 Difference]: Finished difference. Result has 506 places, 760 transitions, 14299 flow [2024-06-20 17:11:04,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13961, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14299, PETRI_PLACES=506, PETRI_TRANSITIONS=760} [2024-06-20 17:11:04,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-20 17:11:04,495 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 760 transitions, 14299 flow [2024-06-20 17:11:04,495 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 17:11:04,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:04,495 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 17:11:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:11:04,495 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 17:11:04,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:04,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1288890436, now seen corresponding path program 3 times [2024-06-20 17:11:04,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:04,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312414478] [2024-06-20 17:11:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:05,688 INFO 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 17:11:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312414478] [2024-06-20 17:11:05,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312414478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:05,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:05,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561786031] [2024-06-20 17:11:05,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:05,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:05,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:11:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 760 transitions, 14299 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 17:11:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:11:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:09,244 INFO L124 PetriNetUnfolderBase]: 5922/9435 cut-off events. [2024-06-20 17:11:09,244 INFO L125 PetriNetUnfolderBase]: For 2057081/2057081 co-relation queries the response was YES. [2024-06-20 17:11:09,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114211 conditions, 9435 events. 5922/9435 cut-off events. For 2057081/2057081 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 62165 event pairs, 1289 based on Foata normal form. 14/9440 useless extension candidates. Maximal degree in co-relation 113986. Up to 8496 conditions per place. [2024-06-20 17:11:09,563 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 633 selfloop transitions, 148 changer transitions 0/786 dead transitions. [2024-06-20 17:11:09,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 786 transitions, 16361 flow [2024-06-20 17:11:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 17:11:09,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-20 17:11:09,564 INFO L175 Difference]: Start difference. First operand has 506 places, 760 transitions, 14299 flow. Second operand 9 states and 175 transitions. [2024-06-20 17:11:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 786 transitions, 16361 flow [2024-06-20 17:11:16,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 786 transitions, 16023 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:16,761 INFO L231 Difference]: Finished difference. Result has 507 places, 760 transitions, 14266 flow [2024-06-20 17:11:16,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13961, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14266, PETRI_PLACES=507, PETRI_TRANSITIONS=760} [2024-06-20 17:11:16,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-20 17:11:16,762 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 760 transitions, 14266 flow [2024-06-20 17:11:16,762 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 17:11:16,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:16,762 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 17:11:16,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:11:16,763 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 17:11:16,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1288884484, now seen corresponding path program 6 times [2024-06-20 17:11:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:16,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482226332] [2024-06-20 17:11:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:17,778 INFO 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 17:11:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482226332] [2024-06-20 17:11:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482226332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:17,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:17,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345865827] [2024-06-20 17:11:17,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:17,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:17,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:17,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:11:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 760 transitions, 14266 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 17:11:17,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:17,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:11:17,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:21,275 INFO L124 PetriNetUnfolderBase]: 5994/9549 cut-off events. [2024-06-20 17:11:21,275 INFO L125 PetriNetUnfolderBase]: For 2128450/2128450 co-relation queries the response was YES. [2024-06-20 17:11:21,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115181 conditions, 9549 events. 5994/9549 cut-off events. For 2128450/2128450 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 62959 event pairs, 1339 based on Foata normal form. 20/9563 useless extension candidates. Maximal degree in co-relation 114955. Up to 8847 conditions per place. [2024-06-20 17:11:21,455 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 686 selfloop transitions, 96 changer transitions 0/787 dead transitions. [2024-06-20 17:11:21,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 787 transitions, 16144 flow [2024-06-20 17:11:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 17:11:21,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 17:11:21,456 INFO L175 Difference]: Start difference. First operand has 507 places, 760 transitions, 14266 flow. Second operand 10 states and 185 transitions. [2024-06-20 17:11:21,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 787 transitions, 16144 flow [2024-06-20 17:11:27,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 787 transitions, 15828 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:27,931 INFO L231 Difference]: Finished difference. Result has 509 places, 762 transitions, 14252 flow [2024-06-20 17:11:27,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13950, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14252, PETRI_PLACES=509, PETRI_TRANSITIONS=762} [2024-06-20 17:11:27,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-20 17:11:27,932 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 762 transitions, 14252 flow [2024-06-20 17:11:27,932 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 17:11:27,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:27,932 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 17:11:27,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:11:27,932 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 17:11:27,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1288736614, now seen corresponding path program 7 times [2024-06-20 17:11:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:27,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343600488] [2024-06-20 17:11:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:27,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:28,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:28,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343600488] [2024-06-20 17:11:28,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343600488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:28,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:28,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:28,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608015621] [2024-06-20 17:11:28,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:28,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:28,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:29,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:11:29,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 762 transitions, 14252 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 17:11:29,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:29,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:11:29,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:32,535 INFO L124 PetriNetUnfolderBase]: 6132/9769 cut-off events. [2024-06-20 17:11:32,536 INFO L125 PetriNetUnfolderBase]: For 2233191/2233191 co-relation queries the response was YES. [2024-06-20 17:11:32,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119459 conditions, 9769 events. 6132/9769 cut-off events. For 2233191/2233191 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 64660 event pairs, 1324 based on Foata normal form. 16/9779 useless extension candidates. Maximal degree in co-relation 119232. Up to 8551 conditions per place. [2024-06-20 17:11:32,871 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 675 selfloop transitions, 115 changer transitions 0/795 dead transitions. [2024-06-20 17:11:32,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 795 transitions, 16548 flow [2024-06-20 17:11:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:11:32,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:11:32,872 INFO L175 Difference]: Start difference. First operand has 509 places, 762 transitions, 14252 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:11:32,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 795 transitions, 16548 flow [2024-06-20 17:11:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 795 transitions, 16299 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 17:11:40,468 INFO L231 Difference]: Finished difference. Result has 513 places, 766 transitions, 14465 flow [2024-06-20 17:11:40,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14003, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14465, PETRI_PLACES=513, PETRI_TRANSITIONS=766} [2024-06-20 17:11:40,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-20 17:11:40,469 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 766 transitions, 14465 flow [2024-06-20 17:11:40,469 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 17:11:40,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:40,469 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 17:11:40,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:11:40,469 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 17:11:40,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:40,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1424376132, now seen corresponding path program 4 times [2024-06-20 17:11:40,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:40,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127836337] [2024-06-20 17:11:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:40,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127836337] [2024-06-20 17:11:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127836337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:41,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:41,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:41,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41743840] [2024-06-20 17:11:41,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:41,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:41,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:11:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 766 transitions, 14465 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 17:11:41,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:41,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:11:41,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:45,320 INFO L124 PetriNetUnfolderBase]: 6234/9920 cut-off events. [2024-06-20 17:11:45,320 INFO L125 PetriNetUnfolderBase]: For 2313500/2313500 co-relation queries the response was YES. [2024-06-20 17:11:45,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122552 conditions, 9920 events. 6234/9920 cut-off events. For 2313500/2313500 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 65983 event pairs, 1441 based on Foata normal form. 16/9927 useless extension candidates. Maximal degree in co-relation 122323. Up to 8870 conditions per place. [2024-06-20 17:11:45,502 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 634 selfloop transitions, 168 changer transitions 0/807 dead transitions. [2024-06-20 17:11:45,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 807 transitions, 17445 flow [2024-06-20 17:11:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:11:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:11:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 17:11:45,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:11:45,503 INFO L175 Difference]: Start difference. First operand has 513 places, 766 transitions, 14465 flow. Second operand 8 states and 160 transitions. [2024-06-20 17:11:45,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 807 transitions, 17445 flow [2024-06-20 17:11:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 807 transitions, 17205 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:53,558 INFO L231 Difference]: Finished difference. Result has 517 places, 779 transitions, 15296 flow [2024-06-20 17:11:53,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14226, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15296, PETRI_PLACES=517, PETRI_TRANSITIONS=779} [2024-06-20 17:11:53,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-20 17:11:53,558 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 779 transitions, 15296 flow [2024-06-20 17:11:53,558 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 17:11:53,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:53,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:53,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:11:53,559 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 17:11:53,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1418811942, now seen corresponding path program 5 times [2024-06-20 17:11:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:53,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54605178] [2024-06-20 17:11:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:53,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:54,575 INFO 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 17:11:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:54,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54605178] [2024-06-20 17:11:54,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54605178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:54,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:54,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245045021] [2024-06-20 17:11:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:54,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:11:54,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 779 transitions, 15296 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 17:11:54,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:54,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:11:54,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:58,242 INFO L124 PetriNetUnfolderBase]: 6297/10011 cut-off events. [2024-06-20 17:11:58,242 INFO L125 PetriNetUnfolderBase]: For 2374930/2374930 co-relation queries the response was YES. [2024-06-20 17:11:58,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124718 conditions, 10011 events. 6297/10011 cut-off events. For 2374930/2374930 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 66614 event pairs, 1437 based on Foata normal form. 16/10018 useless extension candidates. Maximal degree in co-relation 124485. Up to 8957 conditions per place. [2024-06-20 17:11:58,424 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 625 selfloop transitions, 179 changer transitions 0/809 dead transitions. [2024-06-20 17:11:58,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 809 transitions, 17551 flow [2024-06-20 17:11:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:11:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:11:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 17:11:58,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-20 17:11:58,425 INFO L175 Difference]: Start difference. First operand has 517 places, 779 transitions, 15296 flow. Second operand 8 states and 162 transitions. [2024-06-20 17:11:58,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 809 transitions, 17551 flow [2024-06-20 17:12:07,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 809 transitions, 17199 flow, removed 149 selfloop flow, removed 3 redundant places. [2024-06-20 17:12:07,468 INFO L231 Difference]: Finished difference. Result has 523 places, 781 transitions, 15456 flow [2024-06-20 17:12:07,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14944, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15456, PETRI_PLACES=523, PETRI_TRANSITIONS=781} [2024-06-20 17:12:07,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-20 17:12:07,468 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 781 transitions, 15456 flow [2024-06-20 17:12:07,469 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 17:12:07,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:07,469 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 17:12:07,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:12:07,469 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 17:12:07,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash 532208866, now seen corresponding path program 6 times [2024-06-20 17:12:07,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:07,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674872620] [2024-06-20 17:12:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:07,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:08,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:08,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674872620] [2024-06-20 17:12:08,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674872620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:08,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:08,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:12:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616353928] [2024-06-20 17:12:08,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:12:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:12:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:12:08,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:12:08,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 781 transitions, 15456 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 17:12:08,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:08,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:12:08,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:12,213 INFO L124 PetriNetUnfolderBase]: 6349/10085 cut-off events. [2024-06-20 17:12:12,214 INFO L125 PetriNetUnfolderBase]: For 2424832/2424832 co-relation queries the response was YES. [2024-06-20 17:12:12,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126344 conditions, 10085 events. 6349/10085 cut-off events. For 2424832/2424832 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 67162 event pairs, 1445 based on Foata normal form. 14/10090 useless extension candidates. Maximal degree in co-relation 126109. Up to 8833 conditions per place. [2024-06-20 17:12:12,570 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 638 selfloop transitions, 171 changer transitions 0/814 dead transitions. [2024-06-20 17:12:12,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 814 transitions, 17890 flow [2024-06-20 17:12:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:12:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:12:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 17:12:12,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-20 17:12:12,572 INFO L175 Difference]: Start difference. First operand has 523 places, 781 transitions, 15456 flow. Second operand 8 states and 161 transitions. [2024-06-20 17:12:12,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 814 transitions, 17890 flow