./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.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/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:34:34,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:34:34,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:34:34,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:34:34,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:34:34,177 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:34:34,178 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:34:34,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:34:34,178 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:34:34,182 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:34:34,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:34:34,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:34:34,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:34:34,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:34:34,185 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:34:34,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:34:34,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:34:34,186 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:34:34,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:34:34,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:34:34,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:34:34,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:34:34,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:34:34,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:34:34,187 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:34:34,187 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:34:34,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:34:34,188 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:34:34,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:34:34,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:34:34,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:34:34,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:34:34,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:34:34,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:34:34,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:34:34,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:34:34,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:34:34,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:34:34,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:34:34,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:34:34,191 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:34:34,191 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:34:34,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:34:34,191 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:34:34,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:34:34,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:34:34,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:34:34,477 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:34:34,477 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:34:34,478 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 13:34:35,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:34:35,724 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:34:35,724 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 13:34:35,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86808c2b6/801f95c2672146e99c583b1243310c93/FLAG9d3d7fc9a [2024-06-14 13:34:35,751 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86808c2b6/801f95c2672146e99c583b1243310c93 [2024-06-14 13:34:35,753 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:34:35,756 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:34:35,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 13:34:35,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:34:35,887 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:34:35,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:34:35,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:34:35,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:34:35,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:34:35" (1/2) ... [2024-06-14 13:34:35,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be5677f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:35, skipping insertion in model container [2024-06-14 13:34:35,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:34:35" (1/2) ... [2024-06-14 13:34:35,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@749e11b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:35, skipping insertion in model container [2024-06-14 13:34:35,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:34:35" (2/2) ... [2024-06-14 13:34:35,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be5677f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:35, skipping insertion in model container [2024-06-14 13:34:35,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:34:35" (2/2) ... [2024-06-14 13:34:35,894 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:34:35,968 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:34:35,969 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:34:35,969 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:34:35,969 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:34:35,969 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:34:35,970 INFO L106 edCorrectnessWitness]: ghost_update [L830-L830] multithreaded = 1; [2024-06-14 13:34:36,009 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:34:36,317 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:34:36,326 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:34:36,417 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:34:36,446 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:34:36,446 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36 WrapperNode [2024-06-14 13:34:36,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:34:36,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:34:36,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:34:36,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:34:36,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,497 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-14 13:34:36,497 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:34:36,498 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:34:36,498 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:34:36,498 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:34:36,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,511 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,523 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 13:34:36,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:34:36,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:34:36,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:34:36,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:34:36,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (1/1) ... [2024-06-14 13:34:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:34:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:34:36,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:34:36,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:34:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:34:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:34:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:34:36,596 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:34:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:34:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:34:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:34:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:34:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:34:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:34:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:34:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:34:36,599 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:34:36,700 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:34:36,702 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:34:37,019 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:34:37,026 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:34:37,148 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:34:37,148 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:34:37,149 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:34:37 BoogieIcfgContainer [2024-06-14 13:34:37,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:34:37,151 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:34:37,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:34:37,153 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:34:37,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:34:35" (1/4) ... [2024-06-14 13:34:37,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb41773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:34:37, skipping insertion in model container [2024-06-14 13:34:37,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:34:35" (2/4) ... [2024-06-14 13:34:37,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb41773 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:34:37, skipping insertion in model container [2024-06-14 13:34:37,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:36" (3/4) ... [2024-06-14 13:34:37,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb41773 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:34:37, skipping insertion in model container [2024-06-14 13:34:37,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:34:37" (4/4) ... [2024-06-14 13:34:37,156 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 13:34:37,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:34:37,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:34:37,201 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:34:37,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:34:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:34:37,309 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:34:37,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:34:37,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:34:37,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:34:37,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:34:37,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:34:37,325 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;@18c16cfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:34:37,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:34:37,328 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:34:37,328 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:34:37,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:34:37,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:37,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:34:37,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:37,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1673967918, now seen corresponding path program 1 times [2024-06-14 13:34:37,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523582570] [2024-06-14 13:34:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:37,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:38,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:38,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523582570] [2024-06-14 13:34:38,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523582570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:38,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:38,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:34:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172274787] [2024-06-14 13:34:38,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:38,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:34:38,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:34:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:34:38,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 13:34:38,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:38,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:38,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 13:34:38,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:38,447 INFO L124 PetriNetUnfolderBase]: 1359/2058 cut-off events. [2024-06-14 13:34:38,448 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 13:34:38,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 2058 events. 1359/2058 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9772 event pairs, 941 based on Foata normal form. 1/2024 useless extension candidates. Maximal degree in co-relation 4159. Up to 2029 conditions per place. [2024-06-14 13:34:38,460 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 13:34:38,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-14 13:34:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:34:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:34:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-14 13:34:38,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 13:34:38,470 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-14 13:34:38,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-14 13:34:38,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:38,476 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:34:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 13:34:38,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:34:38,480 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:34:38,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:38,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:38,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:34:38,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:38,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:38,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1929611761, now seen corresponding path program 1 times [2024-06-14 13:34:38,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:38,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028606194] [2024-06-14 13:34:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028606194] [2024-06-14 13:34:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028606194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:38,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:34:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821118757] [2024-06-14 13:34:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:34:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:34:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:34:39,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 13:34:39,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:39,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:39,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 13:34:39,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:39,303 INFO L124 PetriNetUnfolderBase]: 1347/2040 cut-off events. [2024-06-14 13:34:39,303 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-14 13:34:39,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2040 events. 1347/2040 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9672 event pairs, 715 based on Foata normal form. 6/2045 useless extension candidates. Maximal degree in co-relation 4668. Up to 1981 conditions per place. [2024-06-14 13:34:39,314 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 13:34:39,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 248 flow [2024-06-14 13:34:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:34:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:34:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 13:34:39,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:34:39,318 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-14 13:34:39,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 248 flow [2024-06-14 13:34:39,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:34:39,321 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 13:34:39,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 13:34:39,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 13:34:39,322 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 13:34:39,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:39,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:39,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:39,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:34:39,325 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)] === [2024-06-14 13:34:39,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash 267149839, now seen corresponding path program 1 times [2024-06-14 13:34:39,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:39,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138909757] [2024-06-14 13:34:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:39,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138909757] [2024-06-14 13:34:39,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138909757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:39,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:39,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:34:39,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121962650] [2024-06-14 13:34:39,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:39,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:34:39,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:34:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:34:39,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:39,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:39,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:39,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:39,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:40,291 INFO L124 PetriNetUnfolderBase]: 1342/2033 cut-off events. [2024-06-14 13:34:40,292 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-14 13:34:40,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 2033 events. 1342/2033 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9581 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-14 13:34:40,302 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-14 13:34:40,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 274 flow [2024-06-14 13:34:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:34:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:34:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-14 13:34:40,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-14 13:34:40,303 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 97 transitions. [2024-06-14 13:34:40,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 274 flow [2024-06-14 13:34:40,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 260 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:40,306 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-14 13:34:40,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 13:34:40,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 13:34:40,307 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-14 13:34:40,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:40,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:40,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:40,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:34:40,307 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)] === [2024-06-14 13:34:40,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -737393617, now seen corresponding path program 1 times [2024-06-14 13:34:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:40,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570442264] [2024-06-14 13:34:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:41,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:41,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570442264] [2024-06-14 13:34:41,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570442264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:41,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:41,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:34:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049652978] [2024-06-14 13:34:41,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:41,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:34:41,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:34:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:34:41,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 13:34:41,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 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) [2024-06-14 13:34:41,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:41,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 13:34:41,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:41,559 INFO L124 PetriNetUnfolderBase]: 1333/2018 cut-off events. [2024-06-14 13:34:41,560 INFO L125 PetriNetUnfolderBase]: For 1936/1936 co-relation queries the response was YES. [2024-06-14 13:34:41,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5647 conditions, 2018 events. 1333/2018 cut-off events. For 1936/1936 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9659 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-14 13:34:41,570 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-14 13:34:41,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 384 flow [2024-06-14 13:34:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 13:34:41,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 13:34:41,575 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 133 transitions. [2024-06-14 13:34:41,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 384 flow [2024-06-14 13:34:41,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 366 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:41,579 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-14 13:34:41,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 13:34:41,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 13:34:41,580 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-14 13:34:41,581 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) [2024-06-14 13:34:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:41,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:41,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:34:41,581 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)] === [2024-06-14 13:34:41,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -308288290, now seen corresponding path program 1 times [2024-06-14 13:34:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804528800] [2024-06-14 13:34:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:42,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804528800] [2024-06-14 13:34:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804528800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:42,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:42,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834298263] [2024-06-14 13:34:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:42,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:42,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:42,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:42,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:42,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:42,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:42,493 INFO L124 PetriNetUnfolderBase]: 1335/2021 cut-off events. [2024-06-14 13:34:42,493 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2024-06-14 13:34:42,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6171 conditions, 2021 events. 1335/2021 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9563 event pairs, 569 based on Foata normal form. 3/2023 useless extension candidates. Maximal degree in co-relation 6151. Up to 1955 conditions per place. [2024-06-14 13:34:42,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-14 13:34:42,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 453 flow [2024-06-14 13:34:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:34:42,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 13:34:42,508 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:34:42,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 453 flow [2024-06-14 13:34:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 424 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:42,516 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 299 flow [2024-06-14 13:34:42,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-14 13:34:42,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 13:34:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 299 flow [2024-06-14 13:34:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:42,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:42,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:34:42,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:42,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1452779772, now seen corresponding path program 1 times [2024-06-14 13:34:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:42,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380261341] [2024-06-14 13:34:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:43,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380261341] [2024-06-14 13:34:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380261341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:43,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712887879] [2024-06-14 13:34:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:43,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:43,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:43,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:43,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:43,522 INFO L124 PetriNetUnfolderBase]: 1357/2063 cut-off events. [2024-06-14 13:34:43,523 INFO L125 PetriNetUnfolderBase]: For 5026/5026 co-relation queries the response was YES. [2024-06-14 13:34:43,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7090 conditions, 2063 events. 1357/2063 cut-off events. For 5026/5026 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9705 event pairs, 556 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 7066. Up to 1991 conditions per place. [2024-06-14 13:34:43,535 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-14 13:34:43,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 519 flow [2024-06-14 13:34:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 13:34:43,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 13:34:43,537 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 299 flow. Second operand 6 states and 117 transitions. [2024-06-14 13:34:43,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 519 flow [2024-06-14 13:34:43,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 505 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 13:34:43,541 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 343 flow [2024-06-14 13:34:43,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 13:34:43,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-14 13:34:43,542 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 343 flow [2024-06-14 13:34:43,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:43,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:43,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:34:43,543 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:43,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:43,543 INFO L85 PathProgramCache]: Analyzing trace with hash -967010002, now seen corresponding path program 2 times [2024-06-14 13:34:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118726927] [2024-06-14 13:34:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:44,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:44,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118726927] [2024-06-14 13:34:44,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118726927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:44,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:44,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339096536] [2024-06-14 13:34:44,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:44,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:44,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:44,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:44,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:44,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:44,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:44,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:44,441 INFO L124 PetriNetUnfolderBase]: 1363/2072 cut-off events. [2024-06-14 13:34:44,441 INFO L125 PetriNetUnfolderBase]: For 6845/6845 co-relation queries the response was YES. [2024-06-14 13:34:44,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 2072 events. 1363/2072 cut-off events. For 6845/6845 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9793 event pairs, 563 based on Foata normal form. 4/2074 useless extension candidates. Maximal degree in co-relation 7631. Up to 1973 conditions per place. [2024-06-14 13:34:44,455 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-14 13:34:44,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 567 flow [2024-06-14 13:34:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 13:34:44,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 13:34:44,456 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 343 flow. Second operand 6 states and 117 transitions. [2024-06-14 13:34:44,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 567 flow [2024-06-14 13:34:44,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 533 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:44,462 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 383 flow [2024-06-14 13:34:44,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-14 13:34:44,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 13:34:44,463 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 383 flow [2024-06-14 13:34:44,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:44,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:44,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:44,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:34:44,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:44,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -967001074, now seen corresponding path program 1 times [2024-06-14 13:34:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:44,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722810726] [2024-06-14 13:34:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:45,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722810726] [2024-06-14 13:34:45,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722810726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:45,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:45,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:45,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624339789] [2024-06-14 13:34:45,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:45,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:45,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:45,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:45,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 383 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:45,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:45,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:45,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:45,620 INFO L124 PetriNetUnfolderBase]: 1365/2080 cut-off events. [2024-06-14 13:34:45,621 INFO L125 PetriNetUnfolderBase]: For 8603/8603 co-relation queries the response was YES. [2024-06-14 13:34:45,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 2080 events. 1365/2080 cut-off events. For 8603/8603 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9932 event pairs, 533 based on Foata normal form. 3/2082 useless extension candidates. Maximal degree in co-relation 8107. Up to 1986 conditions per place. [2024-06-14 13:34:45,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-14 13:34:45,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 659 flow [2024-06-14 13:34:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:34:45,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 13:34:45,635 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 383 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:34:45,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 659 flow [2024-06-14 13:34:45,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 609 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:45,641 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 422 flow [2024-06-14 13:34:45,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-14 13:34:45,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-14 13:34:45,642 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 422 flow [2024-06-14 13:34:45,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:45,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:45,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:34:45,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:45,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash -119191137, now seen corresponding path program 1 times [2024-06-14 13:34:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696321655] [2024-06-14 13:34:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:46,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:46,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696321655] [2024-06-14 13:34:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696321655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:46,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883859992] [2024-06-14 13:34:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:46,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:46,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:46,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:46,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 422 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:46,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:46,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:46,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:46,707 INFO L124 PetriNetUnfolderBase]: 1501/2282 cut-off events. [2024-06-14 13:34:46,707 INFO L125 PetriNetUnfolderBase]: For 10888/10888 co-relation queries the response was YES. [2024-06-14 13:34:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 2282 events. 1501/2282 cut-off events. For 10888/10888 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11040 event pairs, 524 based on Foata normal form. 10/2291 useless extension candidates. Maximal degree in co-relation 9385. Up to 2058 conditions per place. [2024-06-14 13:34:46,724 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 81 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-14 13:34:46,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 878 flow [2024-06-14 13:34:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 13:34:46,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-14 13:34:46,726 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 422 flow. Second operand 7 states and 150 transitions. [2024-06-14 13:34:46,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 878 flow [2024-06-14 13:34:46,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 114 transitions, 819 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:46,733 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 599 flow [2024-06-14 13:34:46,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2024-06-14 13:34:46,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-14 13:34:46,734 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 599 flow [2024-06-14 13:34:46,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:46,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:46,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:46,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:34:46,735 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:46,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 86539921, now seen corresponding path program 2 times [2024-06-14 13:34:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:46,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287927908] [2024-06-14 13:34:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287927908] [2024-06-14 13:34:47,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287927908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606480568] [2024-06-14 13:34:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:47,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:47,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:47,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 599 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:47,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:47,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:47,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:47,847 INFO L124 PetriNetUnfolderBase]: 1725/2613 cut-off events. [2024-06-14 13:34:47,847 INFO L125 PetriNetUnfolderBase]: For 17136/17136 co-relation queries the response was YES. [2024-06-14 13:34:47,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12660 conditions, 2613 events. 1725/2613 cut-off events. For 17136/17136 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12984 event pairs, 550 based on Foata normal form. 10/2621 useless extension candidates. Maximal degree in co-relation 12627. Up to 2028 conditions per place. [2024-06-14 13:34:47,864 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 82 selfloop transitions, 44 changer transitions 0/131 dead transitions. [2024-06-14 13:34:47,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 131 transitions, 1181 flow [2024-06-14 13:34:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:34:47,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-14 13:34:47,865 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 599 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:34:47,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 131 transitions, 1181 flow [2024-06-14 13:34:47,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 131 transitions, 1137 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 13:34:47,880 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 843 flow [2024-06-14 13:34:47,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2024-06-14 13:34:47,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 13:34:47,883 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 843 flow [2024-06-14 13:34:47,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:47,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:47,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:47,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:34:47,883 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:47,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -113626947, now seen corresponding path program 3 times [2024-06-14 13:34:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:47,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802708734] [2024-06-14 13:34:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:47,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:48,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802708734] [2024-06-14 13:34:48,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802708734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:48,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:48,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015952016] [2024-06-14 13:34:48,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:48,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:48,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:48,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:48,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:48,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:48,987 INFO L124 PetriNetUnfolderBase]: 1805/2754 cut-off events. [2024-06-14 13:34:48,987 INFO L125 PetriNetUnfolderBase]: For 22598/22598 co-relation queries the response was YES. [2024-06-14 13:34:48,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14732 conditions, 2754 events. 1805/2754 cut-off events. For 22598/22598 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14013 event pairs, 591 based on Foata normal form. 10/2762 useless extension candidates. Maximal degree in co-relation 14694. Up to 2082 conditions per place. [2024-06-14 13:34:49,007 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 84 selfloop transitions, 48 changer transitions 0/137 dead transitions. [2024-06-14 13:34:49,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1371 flow [2024-06-14 13:34:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 13:34:49,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-06-14 13:34:49,008 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 843 flow. Second operand 7 states and 151 transitions. [2024-06-14 13:34:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1371 flow [2024-06-14 13:34:49,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 137 transitions, 1308 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:49,030 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 1052 flow [2024-06-14 13:34:49,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1052, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2024-06-14 13:34:49,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 13:34:49,031 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 1052 flow [2024-06-14 13:34:49,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:49,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:49,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:34:49,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:49,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash 87739133, now seen corresponding path program 1 times [2024-06-14 13:34:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:49,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831778682] [2024-06-14 13:34:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:49,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:49,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831778682] [2024-06-14 13:34:49,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831778682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:49,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:49,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:49,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067592423] [2024-06-14 13:34:49,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:49,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:49,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:49,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:49,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 1052 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:49,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:49,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:49,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:50,260 INFO L124 PetriNetUnfolderBase]: 1808/2752 cut-off events. [2024-06-14 13:34:50,260 INFO L125 PetriNetUnfolderBase]: For 25194/25194 co-relation queries the response was YES. [2024-06-14 13:34:50,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15458 conditions, 2752 events. 1808/2752 cut-off events. For 25194/25194 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13748 event pairs, 616 based on Foata normal form. 6/2757 useless extension candidates. Maximal degree in co-relation 15416. Up to 2581 conditions per place. [2024-06-14 13:34:50,280 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 24 changer transitions 0/138 dead transitions. [2024-06-14 13:34:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1476 flow [2024-06-14 13:34:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:34:50,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-14 13:34:50,282 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 1052 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:34:50,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1476 flow [2024-06-14 13:34:50,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 1407 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:50,308 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 1095 flow [2024-06-14 13:34:50,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-14 13:34:50,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 13:34:50,308 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 1095 flow [2024-06-14 13:34:50,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:50,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:50,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:50,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:34:50,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:50,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash -698979012, now seen corresponding path program 1 times [2024-06-14 13:34:50,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:50,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569729478] [2024-06-14 13:34:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:50,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:50,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569729478] [2024-06-14 13:34:50,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569729478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:50,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:50,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:34:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811381186] [2024-06-14 13:34:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:34:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:34:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:34:50,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:50,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 1095 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:50,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:50,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:50,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:51,229 INFO L124 PetriNetUnfolderBase]: 1805/2746 cut-off events. [2024-06-14 13:34:51,230 INFO L125 PetriNetUnfolderBase]: For 26861/26861 co-relation queries the response was YES. [2024-06-14 13:34:51,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15675 conditions, 2746 events. 1805/2746 cut-off events. For 26861/26861 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13718 event pairs, 642 based on Foata normal form. 1/2746 useless extension candidates. Maximal degree in co-relation 15631. Up to 2650 conditions per place. [2024-06-14 13:34:51,249 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 107 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2024-06-14 13:34:51,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 120 transitions, 1345 flow [2024-06-14 13:34:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:34:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:34:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 13:34:51,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 13:34:51,250 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 1095 flow. Second operand 5 states and 92 transitions. [2024-06-14 13:34:51,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 120 transitions, 1345 flow [2024-06-14 13:34:51,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 120 transitions, 1251 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:51,276 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 1023 flow [2024-06-14 13:34:51,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1023, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2024-06-14 13:34:51,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 13:34:51,277 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 1023 flow [2024-06-14 13:34:51,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:51,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:51,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:51,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:34:51,278 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:51,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 595274829, now seen corresponding path program 1 times [2024-06-14 13:34:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:51,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184757155] [2024-06-14 13:34:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:51,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:52,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:52,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184757155] [2024-06-14 13:34:52,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184757155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:52,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:52,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317555726] [2024-06-14 13:34:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:52,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:52,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 1023 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:52,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:52,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:52,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:52,590 INFO L124 PetriNetUnfolderBase]: 1800/2739 cut-off events. [2024-06-14 13:34:52,590 INFO L125 PetriNetUnfolderBase]: For 28834/28834 co-relation queries the response was YES. [2024-06-14 13:34:52,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15540 conditions, 2739 events. 1800/2739 cut-off events. For 28834/28834 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13649 event pairs, 621 based on Foata normal form. 2/2740 useless extension candidates. Maximal degree in co-relation 15495. Up to 2607 conditions per place. [2024-06-14 13:34:52,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 121 selfloop transitions, 14 changer transitions 0/140 dead transitions. [2024-06-14 13:34:52,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 140 transitions, 1403 flow [2024-06-14 13:34:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:34:52,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-14 13:34:52,612 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 1023 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:34:52,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 140 transitions, 1403 flow [2024-06-14 13:34:52,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1381 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:52,642 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 1089 flow [2024-06-14 13:34:52,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1089, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2024-06-14 13:34:52,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-14 13:34:52,642 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 1089 flow [2024-06-14 13:34:52,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:52,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:52,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:52,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:34:52,643 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:52,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash 600043373, now seen corresponding path program 1 times [2024-06-14 13:34:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:52,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327053107] [2024-06-14 13:34:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:53,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327053107] [2024-06-14 13:34:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327053107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:53,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:53,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592571558] [2024-06-14 13:34:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:53,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:53,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:53,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:53,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 1089 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:53,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:53,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:53,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:54,110 INFO L124 PetriNetUnfolderBase]: 1864/2830 cut-off events. [2024-06-14 13:34:54,110 INFO L125 PetriNetUnfolderBase]: For 33224/33224 co-relation queries the response was YES. [2024-06-14 13:34:54,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16483 conditions, 2830 events. 1864/2830 cut-off events. For 33224/33224 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14216 event pairs, 548 based on Foata normal form. 10/2839 useless extension candidates. Maximal degree in co-relation 16438. Up to 2524 conditions per place. [2024-06-14 13:34:54,129 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/155 dead transitions. [2024-06-14 13:34:54,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1645 flow [2024-06-14 13:34:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 13:34:54,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-14 13:34:54,132 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 1089 flow. Second operand 8 states and 171 transitions. [2024-06-14 13:34:54,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1645 flow [2024-06-14 13:34:54,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 155 transitions, 1581 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:54,161 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1186 flow [2024-06-14 13:34:54,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1186, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2024-06-14 13:34:54,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-14 13:34:54,162 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1186 flow [2024-06-14 13:34:54,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:54,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:54,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:34:54,163 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)] === [2024-06-14 13:34:54,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1583634579, now seen corresponding path program 2 times [2024-06-14 13:34:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:54,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236507817] [2024-06-14 13:34:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:54,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:54,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236507817] [2024-06-14 13:34:54,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236507817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:54,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:54,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:54,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842938198] [2024-06-14 13:34:54,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:54,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:54,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:54,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 1186 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:54,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:54,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:54,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:55,493 INFO L124 PetriNetUnfolderBase]: 1920/2974 cut-off events. [2024-06-14 13:34:55,494 INFO L125 PetriNetUnfolderBase]: For 38000/38000 co-relation queries the response was YES. [2024-06-14 13:34:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18034 conditions, 2974 events. 1920/2974 cut-off events. For 38000/38000 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15536 event pairs, 492 based on Foata normal form. 5/2977 useless extension candidates. Maximal degree in co-relation 17988. Up to 2426 conditions per place. [2024-06-14 13:34:55,511 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 141 selfloop transitions, 56 changer transitions 0/202 dead transitions. [2024-06-14 13:34:55,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 202 transitions, 2315 flow [2024-06-14 13:34:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 13:34:55,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-14 13:34:55,513 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1186 flow. Second operand 8 states and 170 transitions. [2024-06-14 13:34:55,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 202 transitions, 2315 flow [2024-06-14 13:34:55,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 202 transitions, 2183 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:55,546 INFO L231 Difference]: Finished difference. Result has 104 places, 160 transitions, 1717 flow [2024-06-14 13:34:55,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1717, PETRI_PLACES=104, PETRI_TRANSITIONS=160} [2024-06-14 13:34:55,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 13:34:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 160 transitions, 1717 flow [2024-06-14 13:34:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:55,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:55,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:55,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:34:55,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:55,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1611931751, now seen corresponding path program 3 times [2024-06-14 13:34:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869204555] [2024-06-14 13:34:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:55,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:56,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:56,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869204555] [2024-06-14 13:34:56,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869204555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:56,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:56,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432603683] [2024-06-14 13:34:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:56,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:56,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:56,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:56,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:56,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 160 transitions, 1717 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:56,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:56,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:56,817 INFO L124 PetriNetUnfolderBase]: 1992/3057 cut-off events. [2024-06-14 13:34:56,818 INFO L125 PetriNetUnfolderBase]: For 45188/45188 co-relation queries the response was YES. [2024-06-14 13:34:56,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20101 conditions, 3057 events. 1992/3057 cut-off events. For 45188/45188 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15843 event pairs, 495 based on Foata normal form. 5/3060 useless extension candidates. Maximal degree in co-relation 20050. Up to 2394 conditions per place. [2024-06-14 13:34:56,840 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 142 selfloop transitions, 76 changer transitions 0/223 dead transitions. [2024-06-14 13:34:56,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 223 transitions, 2773 flow [2024-06-14 13:34:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:34:56,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-14 13:34:56,842 INFO L175 Difference]: Start difference. First operand has 104 places, 160 transitions, 1717 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:34:56,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 223 transitions, 2773 flow [2024-06-14 13:34:56,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 223 transitions, 2705 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-14 13:34:56,882 INFO L231 Difference]: Finished difference. Result has 114 places, 183 transitions, 2214 flow [2024-06-14 13:34:56,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2214, PETRI_PLACES=114, PETRI_TRANSITIONS=183} [2024-06-14 13:34:56,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 13:34:56,883 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 183 transitions, 2214 flow [2024-06-14 13:34:56,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:56,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:56,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:56,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:34:56,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:56,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:56,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1612228421, now seen corresponding path program 4 times [2024-06-14 13:34:56,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:56,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507033011] [2024-06-14 13:34:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:56,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:57,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:57,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507033011] [2024-06-14 13:34:57,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507033011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:57,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995746225] [2024-06-14 13:34:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:57,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:57,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:57,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 183 transitions, 2214 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:57,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:57,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:57,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:58,348 INFO L124 PetriNetUnfolderBase]: 2000/3072 cut-off events. [2024-06-14 13:34:58,349 INFO L125 PetriNetUnfolderBase]: For 52335/52335 co-relation queries the response was YES. [2024-06-14 13:34:58,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21867 conditions, 3072 events. 2000/3072 cut-off events. For 52335/52335 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15926 event pairs, 495 based on Foata normal form. 5/3075 useless extension candidates. Maximal degree in co-relation 21810. Up to 2539 conditions per place. [2024-06-14 13:34:58,374 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 155 selfloop transitions, 64 changer transitions 0/224 dead transitions. [2024-06-14 13:34:58,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 224 transitions, 2999 flow [2024-06-14 13:34:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 13:34:58,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-14 13:34:58,375 INFO L175 Difference]: Start difference. First operand has 114 places, 183 transitions, 2214 flow. Second operand 8 states and 170 transitions. [2024-06-14 13:34:58,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 224 transitions, 2999 flow [2024-06-14 13:34:58,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 224 transitions, 2909 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:58,436 INFO L231 Difference]: Finished difference. Result has 121 places, 188 transitions, 2381 flow [2024-06-14 13:34:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2381, PETRI_PLACES=121, PETRI_TRANSITIONS=188} [2024-06-14 13:34:58,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-14 13:34:58,436 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 188 transitions, 2381 flow [2024-06-14 13:34:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:58,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:58,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:58,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:34:58,437 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)] === [2024-06-14 13:34:58,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash -193511713, now seen corresponding path program 1 times [2024-06-14 13:34:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:58,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80096211] [2024-06-14 13:34:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:58,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80096211] [2024-06-14 13:34:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80096211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:58,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:58,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894828461] [2024-06-14 13:34:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:58,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:58,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:58,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:58,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 188 transitions, 2381 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:58,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:58,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:58,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:59,613 INFO L124 PetriNetUnfolderBase]: 2014/3066 cut-off events. [2024-06-14 13:34:59,613 INFO L125 PetriNetUnfolderBase]: For 57191/57191 co-relation queries the response was YES. [2024-06-14 13:34:59,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 3066 events. 2014/3066 cut-off events. For 57191/57191 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15675 event pairs, 586 based on Foata normal form. 6/3069 useless extension candidates. Maximal degree in co-relation 22661. Up to 2853 conditions per place. [2024-06-14 13:34:59,636 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 27 changer transitions 0/211 dead transitions. [2024-06-14 13:34:59,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 211 transitions, 3035 flow [2024-06-14 13:34:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:34:59,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 13:34:59,637 INFO L175 Difference]: Start difference. First operand has 121 places, 188 transitions, 2381 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:34:59,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 211 transitions, 3035 flow [2024-06-14 13:34:59,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 211 transitions, 2848 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:59,694 INFO L231 Difference]: Finished difference. Result has 123 places, 198 transitions, 2444 flow [2024-06-14 13:34:59,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2444, PETRI_PLACES=123, PETRI_TRANSITIONS=198} [2024-06-14 13:34:59,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-14 13:34:59,694 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 198 transitions, 2444 flow [2024-06-14 13:34:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:59,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:59,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:34:59,695 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:59,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -736627660, now seen corresponding path program 1 times [2024-06-14 13:34:59,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:59,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049618103] [2024-06-14 13:34:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:00,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:00,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049618103] [2024-06-14 13:35:00,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049618103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:00,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:00,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:00,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136401245] [2024-06-14 13:35:00,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:00,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:00,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:00,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:00,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 198 transitions, 2444 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:00,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:00,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:00,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:01,244 INFO L124 PetriNetUnfolderBase]: 2113/3218 cut-off events. [2024-06-14 13:35:01,245 INFO L125 PetriNetUnfolderBase]: For 63706/63706 co-relation queries the response was YES. [2024-06-14 13:35:01,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24035 conditions, 3218 events. 2113/3218 cut-off events. For 63706/63706 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16485 event pairs, 575 based on Foata normal form. 6/3223 useless extension candidates. Maximal degree in co-relation 23973. Up to 2953 conditions per place. [2024-06-14 13:35:01,271 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 217 selfloop transitions, 44 changer transitions 0/266 dead transitions. [2024-06-14 13:35:01,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 266 transitions, 3652 flow [2024-06-14 13:35:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 13:35:01,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-14 13:35:01,272 INFO L175 Difference]: Start difference. First operand has 123 places, 198 transitions, 2444 flow. Second operand 10 states and 204 transitions. [2024-06-14 13:35:01,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 266 transitions, 3652 flow [2024-06-14 13:35:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 266 transitions, 3567 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:01,378 INFO L231 Difference]: Finished difference. Result has 134 places, 224 transitions, 2894 flow [2024-06-14 13:35:01,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2894, PETRI_PLACES=134, PETRI_TRANSITIONS=224} [2024-06-14 13:35:01,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 13:35:01,378 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 224 transitions, 2894 flow [2024-06-14 13:35:01,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:01,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:01,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:01,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:35:01,379 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:01,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -328753252, now seen corresponding path program 2 times [2024-06-14 13:35:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:01,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371934343] [2024-06-14 13:35:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:02,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371934343] [2024-06-14 13:35:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371934343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:02,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:02,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993185173] [2024-06-14 13:35:02,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:02,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:02,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:02,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 224 transitions, 2894 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:02,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:02,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:02,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:02,860 INFO L124 PetriNetUnfolderBase]: 2145/3277 cut-off events. [2024-06-14 13:35:02,860 INFO L125 PetriNetUnfolderBase]: For 71460/71460 co-relation queries the response was YES. [2024-06-14 13:35:02,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25435 conditions, 3277 events. 2145/3277 cut-off events. For 71460/71460 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16959 event pairs, 557 based on Foata normal form. 5/3281 useless extension candidates. Maximal degree in co-relation 25368. Up to 2969 conditions per place. [2024-06-14 13:35:02,887 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 218 selfloop transitions, 49 changer transitions 0/272 dead transitions. [2024-06-14 13:35:02,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 272 transitions, 3980 flow [2024-06-14 13:35:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 13:35:02,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-14 13:35:02,889 INFO L175 Difference]: Start difference. First operand has 134 places, 224 transitions, 2894 flow. Second operand 8 states and 171 transitions. [2024-06-14 13:35:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 272 transitions, 3980 flow [2024-06-14 13:35:02,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 272 transitions, 3773 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-06-14 13:35:02,975 INFO L231 Difference]: Finished difference. Result has 141 places, 239 transitions, 3165 flow [2024-06-14 13:35:02,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3165, PETRI_PLACES=141, PETRI_TRANSITIONS=239} [2024-06-14 13:35:02,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 13:35:02,975 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 239 transitions, 3165 flow [2024-06-14 13:35:02,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:02,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:02,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:35:02,976 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:02,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash -621969168, now seen corresponding path program 1 times [2024-06-14 13:35:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:02,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943807640] [2024-06-14 13:35:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:02,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:03,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943807640] [2024-06-14 13:35:03,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943807640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:03,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:03,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100660944] [2024-06-14 13:35:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:03,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:03,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:03,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:03,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 239 transitions, 3165 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:03,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:03,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:03,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:04,684 INFO L124 PetriNetUnfolderBase]: 2545/3940 cut-off events. [2024-06-14 13:35:04,684 INFO L125 PetriNetUnfolderBase]: For 107178/107178 co-relation queries the response was YES. [2024-06-14 13:35:04,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29986 conditions, 3940 events. 2545/3940 cut-off events. For 107178/107178 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21324 event pairs, 630 based on Foata normal form. 92/4031 useless extension candidates. Maximal degree in co-relation 29915. Up to 2970 conditions per place. [2024-06-14 13:35:04,716 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 235 selfloop transitions, 47 changer transitions 0/287 dead transitions. [2024-06-14 13:35:04,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 287 transitions, 4114 flow [2024-06-14 13:35:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:35:04,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 13:35:04,717 INFO L175 Difference]: Start difference. First operand has 141 places, 239 transitions, 3165 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:35:04,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 287 transitions, 4114 flow [2024-06-14 13:35:04,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 287 transitions, 3932 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:04,835 INFO L231 Difference]: Finished difference. Result has 146 places, 242 transitions, 3174 flow [2024-06-14 13:35:04,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3174, PETRI_PLACES=146, PETRI_TRANSITIONS=242} [2024-06-14 13:35:04,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-14 13:35:04,836 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 242 transitions, 3174 flow [2024-06-14 13:35:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:04,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:04,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:35:04,836 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:04,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1348011449, now seen corresponding path program 1 times [2024-06-14 13:35:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407594120] [2024-06-14 13:35:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:05,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:05,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407594120] [2024-06-14 13:35:05,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407594120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:05,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:05,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892137402] [2024-06-14 13:35:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:05,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:05,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:05,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:05,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 242 transitions, 3174 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:05,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:05,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:05,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:06,115 INFO L124 PetriNetUnfolderBase]: 2552/3954 cut-off events. [2024-06-14 13:35:06,115 INFO L125 PetriNetUnfolderBase]: For 92730/92730 co-relation queries the response was YES. [2024-06-14 13:35:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30490 conditions, 3954 events. 2552/3954 cut-off events. For 92730/92730 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21397 event pairs, 691 based on Foata normal form. 3/3956 useless extension candidates. Maximal degree in co-relation 30417. Up to 3693 conditions per place. [2024-06-14 13:35:06,152 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 44 changer transitions 0/265 dead transitions. [2024-06-14 13:35:06,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 265 transitions, 3919 flow [2024-06-14 13:35:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 13:35:06,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-14 13:35:06,154 INFO L175 Difference]: Start difference. First operand has 146 places, 242 transitions, 3174 flow. Second operand 6 states and 123 transitions. [2024-06-14 13:35:06,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 265 transitions, 3919 flow [2024-06-14 13:35:06,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 265 transitions, 3758 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:06,307 INFO L231 Difference]: Finished difference. Result has 145 places, 247 transitions, 3219 flow [2024-06-14 13:35:06,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3219, PETRI_PLACES=145, PETRI_TRANSITIONS=247} [2024-06-14 13:35:06,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 13:35:06,307 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 247 transitions, 3219 flow [2024-06-14 13:35:06,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:06,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:06,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:35:06,308 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:06,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1304027346, now seen corresponding path program 2 times [2024-06-14 13:35:06,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:06,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465410332] [2024-06-14 13:35:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:06,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:07,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465410332] [2024-06-14 13:35:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465410332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:07,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:07,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302153079] [2024-06-14 13:35:07,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:07,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:07,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:07,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:07,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 247 transitions, 3219 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:07,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:07,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:07,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:08,133 INFO L124 PetriNetUnfolderBase]: 2991/4671 cut-off events. [2024-06-14 13:35:08,134 INFO L125 PetriNetUnfolderBase]: For 127810/127810 co-relation queries the response was YES. [2024-06-14 13:35:08,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34566 conditions, 4671 events. 2991/4671 cut-off events. For 127810/127810 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26435 event pairs, 704 based on Foata normal form. 97/4766 useless extension candidates. Maximal degree in co-relation 34492. Up to 3296 conditions per place. [2024-06-14 13:35:08,175 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 218 selfloop transitions, 82 changer transitions 0/305 dead transitions. [2024-06-14 13:35:08,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 305 transitions, 4453 flow [2024-06-14 13:35:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 13:35:08,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 13:35:08,189 INFO L175 Difference]: Start difference. First operand has 145 places, 247 transitions, 3219 flow. Second operand 9 states and 199 transitions. [2024-06-14 13:35:08,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 305 transitions, 4453 flow [2024-06-14 13:35:08,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 305 transitions, 4357 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:08,395 INFO L231 Difference]: Finished difference. Result has 152 places, 258 transitions, 3564 flow [2024-06-14 13:35:08,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3564, PETRI_PLACES=152, PETRI_TRANSITIONS=258} [2024-06-14 13:35:08,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-14 13:35:08,396 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 258 transitions, 3564 flow [2024-06-14 13:35:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:08,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:08,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:08,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:35:08,396 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:08,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1582333058, now seen corresponding path program 3 times [2024-06-14 13:35:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226699486] [2024-06-14 13:35:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:09,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:09,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226699486] [2024-06-14 13:35:09,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226699486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:09,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:09,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:09,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095185661] [2024-06-14 13:35:09,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:09,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:09,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 258 transitions, 3564 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:09,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:09,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:09,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:10,315 INFO L124 PetriNetUnfolderBase]: 3469/5453 cut-off events. [2024-06-14 13:35:10,315 INFO L125 PetriNetUnfolderBase]: For 163907/163907 co-relation queries the response was YES. [2024-06-14 13:35:10,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41655 conditions, 5453 events. 3469/5453 cut-off events. For 163907/163907 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31926 event pairs, 824 based on Foata normal form. 97/5548 useless extension candidates. Maximal degree in co-relation 41579. Up to 3857 conditions per place. [2024-06-14 13:35:10,366 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 208 selfloop transitions, 119 changer transitions 0/332 dead transitions. [2024-06-14 13:35:10,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 332 transitions, 5085 flow [2024-06-14 13:35:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:35:10,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 13:35:10,367 INFO L175 Difference]: Start difference. First operand has 152 places, 258 transitions, 3564 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:35:10,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 332 transitions, 5085 flow [2024-06-14 13:35:10,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 332 transitions, 4819 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:10,572 INFO L231 Difference]: Finished difference. Result has 158 places, 279 transitions, 4021 flow [2024-06-14 13:35:10,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4021, PETRI_PLACES=158, PETRI_TRANSITIONS=279} [2024-06-14 13:35:10,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:35:10,573 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 279 transitions, 4021 flow [2024-06-14 13:35:10,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:10,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:10,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:10,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:35:10,573 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:10,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1582006628, now seen corresponding path program 4 times [2024-06-14 13:35:10,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:10,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089887893] [2024-06-14 13:35:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089887893] [2024-06-14 13:35:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089887893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:11,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646761487] [2024-06-14 13:35:11,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:11,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 279 transitions, 4021 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:12,605 INFO L124 PetriNetUnfolderBase]: 3908/6174 cut-off events. [2024-06-14 13:35:12,605 INFO L125 PetriNetUnfolderBase]: For 189359/189359 co-relation queries the response was YES. [2024-06-14 13:35:12,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49577 conditions, 6174 events. 3908/6174 cut-off events. For 189359/189359 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37122 event pairs, 951 based on Foata normal form. 18/6190 useless extension candidates. Maximal degree in co-relation 49498. Up to 2579 conditions per place. [2024-06-14 13:35:12,763 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 213 selfloop transitions, 120 changer transitions 0/338 dead transitions. [2024-06-14 13:35:12,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 338 transitions, 5437 flow [2024-06-14 13:35:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 13:35:12,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-14 13:35:12,764 INFO L175 Difference]: Start difference. First operand has 158 places, 279 transitions, 4021 flow. Second operand 9 states and 203 transitions. [2024-06-14 13:35:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 338 transitions, 5437 flow [2024-06-14 13:35:13,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 338 transitions, 5215 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:13,031 INFO L231 Difference]: Finished difference. Result has 164 places, 284 transitions, 4236 flow [2024-06-14 13:35:13,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4236, PETRI_PLACES=164, PETRI_TRANSITIONS=284} [2024-06-14 13:35:13,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-14 13:35:13,031 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 284 transitions, 4236 flow [2024-06-14 13:35:13,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:13,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:13,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:35:13,032 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:13,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1703044577, now seen corresponding path program 2 times [2024-06-14 13:35:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:13,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492617800] [2024-06-14 13:35:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:13,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:13,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492617800] [2024-06-14 13:35:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492617800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:13,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:13,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:13,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039057119] [2024-06-14 13:35:13,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:13,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:13,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:13,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:13,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 284 transitions, 4236 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:13,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:13,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:14,624 INFO L124 PetriNetUnfolderBase]: 3879/6127 cut-off events. [2024-06-14 13:35:14,624 INFO L125 PetriNetUnfolderBase]: For 191553/191553 co-relation queries the response was YES. [2024-06-14 13:35:14,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50081 conditions, 6127 events. 3879/6127 cut-off events. For 191553/191553 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36936 event pairs, 1245 based on Foata normal form. 7/6131 useless extension candidates. Maximal degree in co-relation 49999. Up to 5846 conditions per place. [2024-06-14 13:35:14,680 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 249 selfloop transitions, 41 changer transitions 0/295 dead transitions. [2024-06-14 13:35:14,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 295 transitions, 4872 flow [2024-06-14 13:35:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 13:35:14,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-14 13:35:14,681 INFO L175 Difference]: Start difference. First operand has 164 places, 284 transitions, 4236 flow. Second operand 6 states and 115 transitions. [2024-06-14 13:35:14,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 295 transitions, 4872 flow [2024-06-14 13:35:14,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 295 transitions, 4628 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:14,991 INFO L231 Difference]: Finished difference. Result has 166 places, 284 transitions, 4095 flow [2024-06-14 13:35:14,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4095, PETRI_PLACES=166, PETRI_TRANSITIONS=284} [2024-06-14 13:35:14,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 13:35:14,991 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 284 transitions, 4095 flow [2024-06-14 13:35:14,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:14,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:14,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:14,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:35:14,992 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:14,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1354684633, now seen corresponding path program 1 times [2024-06-14 13:35:14,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:14,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042415239] [2024-06-14 13:35:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:15,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:15,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042415239] [2024-06-14 13:35:15,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042415239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:15,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:15,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:15,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617894673] [2024-06-14 13:35:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:15,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:15,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:15,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:15,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 284 transitions, 4095 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:15,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:15,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:15,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:16,638 INFO L124 PetriNetUnfolderBase]: 3881/6127 cut-off events. [2024-06-14 13:35:16,639 INFO L125 PetriNetUnfolderBase]: For 189277/189277 co-relation queries the response was YES. [2024-06-14 13:35:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 6127 events. 3881/6127 cut-off events. For 189277/189277 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36979 event pairs, 1193 based on Foata normal form. 2/6128 useless extension candidates. Maximal degree in co-relation 49695. Up to 5912 conditions per place. [2024-06-14 13:35:16,709 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 19 changer transitions 0/300 dead transitions. [2024-06-14 13:35:16,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 300 transitions, 4822 flow [2024-06-14 13:35:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:35:16,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 13:35:16,710 INFO L175 Difference]: Start difference. First operand has 166 places, 284 transitions, 4095 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:35:16,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 300 transitions, 4822 flow [2024-06-14 13:35:17,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 300 transitions, 4696 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:17,014 INFO L231 Difference]: Finished difference. Result has 166 places, 287 transitions, 4058 flow [2024-06-14 13:35:17,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4058, PETRI_PLACES=166, PETRI_TRANSITIONS=287} [2024-06-14 13:35:17,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 13:35:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 287 transitions, 4058 flow [2024-06-14 13:35:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:17,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:17,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:17,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:35:17,016 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:17,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1703902533, now seen corresponding path program 2 times [2024-06-14 13:35:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978594668] [2024-06-14 13:35:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978594668] [2024-06-14 13:35:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978594668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:17,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:17,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:17,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892743699] [2024-06-14 13:35:17,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:17,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:17,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:17,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:17,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:17,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 287 transitions, 4058 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:17,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:17,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:17,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:18,492 INFO L124 PetriNetUnfolderBase]: 3842/6060 cut-off events. [2024-06-14 13:35:18,493 INFO L125 PetriNetUnfolderBase]: For 193890/193890 co-relation queries the response was YES. [2024-06-14 13:35:18,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49457 conditions, 6060 events. 3842/6060 cut-off events. For 193890/193890 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36436 event pairs, 1193 based on Foata normal form. 1/6060 useless extension candidates. Maximal degree in co-relation 49372. Up to 5880 conditions per place. [2024-06-14 13:35:18,553 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 280 selfloop transitions, 11 changer transitions 0/296 dead transitions. [2024-06-14 13:35:18,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 296 transitions, 4666 flow [2024-06-14 13:35:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:35:18,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:35:18,554 INFO L175 Difference]: Start difference. First operand has 166 places, 287 transitions, 4058 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:35:18,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 296 transitions, 4666 flow [2024-06-14 13:35:18,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 296 transitions, 4637 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:18,812 INFO L231 Difference]: Finished difference. Result has 169 places, 287 transitions, 4057 flow [2024-06-14 13:35:18,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4057, PETRI_PLACES=169, PETRI_TRANSITIONS=287} [2024-06-14 13:35:18,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:35:18,813 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 287 transitions, 4057 flow [2024-06-14 13:35:18,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:18,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:18,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:18,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:35:18,813 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:18,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash 938606512, now seen corresponding path program 1 times [2024-06-14 13:35:18,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:18,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665459773] [2024-06-14 13:35:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665459773] [2024-06-14 13:35:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665459773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:19,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675278558] [2024-06-14 13:35:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:19,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 287 transitions, 4057 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:19,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:19,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:19,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:20,600 INFO L124 PetriNetUnfolderBase]: 3859/6088 cut-off events. [2024-06-14 13:35:20,600 INFO L125 PetriNetUnfolderBase]: For 203715/203715 co-relation queries the response was YES. [2024-06-14 13:35:20,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49935 conditions, 6088 events. 3859/6088 cut-off events. For 203715/203715 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36492 event pairs, 1030 based on Foata normal form. 4/6091 useless extension candidates. Maximal degree in co-relation 49849. Up to 5819 conditions per place. [2024-06-14 13:35:20,658 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 297 selfloop transitions, 17 changer transitions 0/319 dead transitions. [2024-06-14 13:35:20,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 319 transitions, 4839 flow [2024-06-14 13:35:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:35:20,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 13:35:20,659 INFO L175 Difference]: Start difference. First operand has 169 places, 287 transitions, 4057 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:35:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 319 transitions, 4839 flow [2024-06-14 13:35:20,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 319 transitions, 4792 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:20,917 INFO L231 Difference]: Finished difference. Result has 171 places, 289 transitions, 4119 flow [2024-06-14 13:35:20,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4119, PETRI_PLACES=171, PETRI_TRANSITIONS=289} [2024-06-14 13:35:20,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-14 13:35:20,918 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 289 transitions, 4119 flow [2024-06-14 13:35:20,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:20,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:20,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:20,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:35:20,918 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:20,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1906183226, now seen corresponding path program 2 times [2024-06-14 13:35:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:20,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100491437] [2024-06-14 13:35:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:21,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:21,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100491437] [2024-06-14 13:35:21,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100491437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:21,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:21,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703231693] [2024-06-14 13:35:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:21,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:21,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 289 transitions, 4119 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:21,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:21,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:21,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:22,764 INFO L124 PetriNetUnfolderBase]: 3876/6115 cut-off events. [2024-06-14 13:35:22,765 INFO L125 PetriNetUnfolderBase]: For 214558/214558 co-relation queries the response was YES. [2024-06-14 13:35:22,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50623 conditions, 6115 events. 3876/6115 cut-off events. For 214558/214558 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36749 event pairs, 1145 based on Foata normal form. 4/6118 useless extension candidates. Maximal degree in co-relation 50536. Up to 5864 conditions per place. [2024-06-14 13:35:22,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 20 changer transitions 0/320 dead transitions. [2024-06-14 13:35:22,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 320 transitions, 4905 flow [2024-06-14 13:35:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:35:22,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 13:35:22,825 INFO L175 Difference]: Start difference. First operand has 171 places, 289 transitions, 4119 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:35:22,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 320 transitions, 4905 flow [2024-06-14 13:35:23,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 320 transitions, 4814 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:23,157 INFO L231 Difference]: Finished difference. Result has 173 places, 291 transitions, 4148 flow [2024-06-14 13:35:23,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4148, PETRI_PLACES=173, PETRI_TRANSITIONS=291} [2024-06-14 13:35:23,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 13:35:23,157 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 291 transitions, 4148 flow [2024-06-14 13:35:23,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:23,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:23,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:23,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:35:23,158 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:23,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 828501708, now seen corresponding path program 1 times [2024-06-14 13:35:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:23,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514355868] [2024-06-14 13:35:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:23,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:24,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514355868] [2024-06-14 13:35:24,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514355868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:24,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:24,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:24,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328443350] [2024-06-14 13:35:24,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:24,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:24,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:24,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:24,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 291 transitions, 4148 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:24,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:24,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:24,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:25,328 INFO L124 PetriNetUnfolderBase]: 3908/6165 cut-off events. [2024-06-14 13:35:25,328 INFO L125 PetriNetUnfolderBase]: For 226862/226862 co-relation queries the response was YES. [2024-06-14 13:35:25,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51398 conditions, 6165 events. 3908/6165 cut-off events. For 226862/226862 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37072 event pairs, 1120 based on Foata normal form. 5/6169 useless extension candidates. Maximal degree in co-relation 51310. Up to 5785 conditions per place. [2024-06-14 13:35:25,393 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 264 selfloop transitions, 63 changer transitions 0/332 dead transitions. [2024-06-14 13:35:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 332 transitions, 5142 flow [2024-06-14 13:35:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:35:25,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:35:25,394 INFO L175 Difference]: Start difference. First operand has 173 places, 291 transitions, 4148 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:35:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 332 transitions, 5142 flow [2024-06-14 13:35:25,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 332 transitions, 5042 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:25,683 INFO L231 Difference]: Finished difference. Result has 176 places, 296 transitions, 4348 flow [2024-06-14 13:35:25,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4348, PETRI_PLACES=176, PETRI_TRANSITIONS=296} [2024-06-14 13:35:25,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 13:35:25,683 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 296 transitions, 4348 flow [2024-06-14 13:35:25,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:25,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:25,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:35:25,684 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:25,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -267069536, now seen corresponding path program 3 times [2024-06-14 13:35:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:25,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525441843] [2024-06-14 13:35:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:26,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525441843] [2024-06-14 13:35:26,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525441843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:26,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:26,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086758002] [2024-06-14 13:35:26,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:26,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:26,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:26,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 296 transitions, 4348 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:26,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:26,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:27,626 INFO L124 PetriNetUnfolderBase]: 3925/6200 cut-off events. [2024-06-14 13:35:27,627 INFO L125 PetriNetUnfolderBase]: For 241107/241107 co-relation queries the response was YES. [2024-06-14 13:35:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52945 conditions, 6200 events. 3925/6200 cut-off events. For 241107/241107 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37337 event pairs, 1122 based on Foata normal form. 4/6203 useless extension candidates. Maximal degree in co-relation 52856. Up to 5962 conditions per place. [2024-06-14 13:35:27,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 16 changer transitions 0/327 dead transitions. [2024-06-14 13:35:27,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 327 transitions, 5166 flow [2024-06-14 13:35:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:35:27,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:35:27,693 INFO L175 Difference]: Start difference. First operand has 176 places, 296 transitions, 4348 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:35:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 327 transitions, 5166 flow [2024-06-14 13:35:28,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 327 transitions, 4912 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:28,065 INFO L231 Difference]: Finished difference. Result has 178 places, 300 transitions, 4235 flow [2024-06-14 13:35:28,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4235, PETRI_PLACES=178, PETRI_TRANSITIONS=300} [2024-06-14 13:35:28,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 13:35:28,065 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 300 transitions, 4235 flow [2024-06-14 13:35:28,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:28,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:28,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:35:28,066 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:28,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:28,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1800461466, now seen corresponding path program 2 times [2024-06-14 13:35:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:28,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665664273] [2024-06-14 13:35:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665664273] [2024-06-14 13:35:29,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665664273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:29,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:29,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17396159] [2024-06-14 13:35:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:29,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:29,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 300 transitions, 4235 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:29,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:29,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:29,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:30,491 INFO L124 PetriNetUnfolderBase]: 3989/6312 cut-off events. [2024-06-14 13:35:30,491 INFO L125 PetriNetUnfolderBase]: For 253726/253726 co-relation queries the response was YES. [2024-06-14 13:35:30,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53767 conditions, 6312 events. 3989/6312 cut-off events. For 253726/253726 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 38280 event pairs, 1083 based on Foata normal form. 5/6316 useless extension candidates. Maximal degree in co-relation 53676. Up to 5844 conditions per place. [2024-06-14 13:35:30,554 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 290 selfloop transitions, 57 changer transitions 0/352 dead transitions. [2024-06-14 13:35:30,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 352 transitions, 5411 flow [2024-06-14 13:35:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 13:35:30,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-14 13:35:30,555 INFO L175 Difference]: Start difference. First operand has 178 places, 300 transitions, 4235 flow. Second operand 10 states and 209 transitions. [2024-06-14 13:35:30,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 352 transitions, 5411 flow [2024-06-14 13:35:30,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 352 transitions, 5306 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:30,882 INFO L231 Difference]: Finished difference. Result has 184 places, 311 transitions, 4529 flow [2024-06-14 13:35:30,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4529, PETRI_PLACES=184, PETRI_TRANSITIONS=311} [2024-06-14 13:35:30,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 13:35:30,882 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 311 transitions, 4529 flow [2024-06-14 13:35:30,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:30,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:30,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:30,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:35:30,883 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:30,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1461044372, now seen corresponding path program 4 times [2024-06-14 13:35:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343715648] [2024-06-14 13:35:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343715648] [2024-06-14 13:35:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343715648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:31,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:31,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7113706] [2024-06-14 13:35:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:31,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:31,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 311 transitions, 4529 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:31,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:31,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:31,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:32,875 INFO L124 PetriNetUnfolderBase]: 3981/6302 cut-off events. [2024-06-14 13:35:32,876 INFO L125 PetriNetUnfolderBase]: For 266364/266364 co-relation queries the response was YES. [2024-06-14 13:35:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54885 conditions, 6302 events. 3981/6302 cut-off events. For 266364/266364 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 38160 event pairs, 1129 based on Foata normal form. 4/6304 useless extension candidates. Maximal degree in co-relation 54792. Up to 6015 conditions per place. [2024-06-14 13:35:32,940 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 23 changer transitions 0/339 dead transitions. [2024-06-14 13:35:32,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 339 transitions, 5367 flow [2024-06-14 13:35:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:35:32,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:35:32,942 INFO L175 Difference]: Start difference. First operand has 184 places, 311 transitions, 4529 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:35:32,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 339 transitions, 5367 flow [2024-06-14 13:35:33,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 339 transitions, 5107 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:33,327 INFO L231 Difference]: Finished difference. Result has 186 places, 315 transitions, 4430 flow [2024-06-14 13:35:33,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4430, PETRI_PLACES=186, PETRI_TRANSITIONS=315} [2024-06-14 13:35:33,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 13:35:33,328 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 315 transitions, 4430 flow [2024-06-14 13:35:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:33,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:33,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:35:33,328 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:33,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1807692084, now seen corresponding path program 3 times [2024-06-14 13:35:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684571454] [2024-06-14 13:35:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684571454] [2024-06-14 13:35:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684571454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:34,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498060629] [2024-06-14 13:35:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:34,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:34,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 315 transitions, 4430 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:34,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:34,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:34,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:35,444 INFO L124 PetriNetUnfolderBase]: 4051/6409 cut-off events. [2024-06-14 13:35:35,444 INFO L125 PetriNetUnfolderBase]: For 283220/283220 co-relation queries the response was YES. [2024-06-14 13:35:35,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55956 conditions, 6409 events. 4051/6409 cut-off events. For 283220/283220 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38910 event pairs, 896 based on Foata normal form. 5/6411 useless extension candidates. Maximal degree in co-relation 55861. Up to 4930 conditions per place. [2024-06-14 13:35:35,517 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 169 selfloop transitions, 194 changer transitions 0/368 dead transitions. [2024-06-14 13:35:35,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 368 transitions, 6086 flow [2024-06-14 13:35:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:35:35,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 13:35:35,518 INFO L175 Difference]: Start difference. First operand has 186 places, 315 transitions, 4430 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:35:35,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 368 transitions, 6086 flow [2024-06-14 13:35:35,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 368 transitions, 5961 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:35,925 INFO L231 Difference]: Finished difference. Result has 191 places, 331 transitions, 5272 flow [2024-06-14 13:35:35,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5272, PETRI_PLACES=191, PETRI_TRANSITIONS=331} [2024-06-14 13:35:35,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 13:35:35,926 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 331 transitions, 5272 flow [2024-06-14 13:35:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:35:35,926 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:35,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:35,926 INFO L85 PathProgramCache]: Analyzing trace with hash -468420096, now seen corresponding path program 4 times [2024-06-14 13:35:35,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:35,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926659324] [2024-06-14 13:35:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:36,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926659324] [2024-06-14 13:35:36,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926659324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:36,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:36,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:36,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79942357] [2024-06-14 13:35:36,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:37,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:37,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 331 transitions, 5272 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:37,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:37,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:37,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:38,305 INFO L124 PetriNetUnfolderBase]: 4081/6471 cut-off events. [2024-06-14 13:35:38,305 INFO L125 PetriNetUnfolderBase]: For 307460/307460 co-relation queries the response was YES. [2024-06-14 13:35:38,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59224 conditions, 6471 events. 4081/6471 cut-off events. For 307460/307460 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 39631 event pairs, 946 based on Foata normal form. 5/6474 useless extension candidates. Maximal degree in co-relation 59127. Up to 5594 conditions per place. [2024-06-14 13:35:38,382 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 279 selfloop transitions, 96 changer transitions 0/380 dead transitions. [2024-06-14 13:35:38,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 380 transitions, 6582 flow [2024-06-14 13:35:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 13:35:38,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:35:38,384 INFO L175 Difference]: Start difference. First operand has 191 places, 331 transitions, 5272 flow. Second operand 10 states and 210 transitions. [2024-06-14 13:35:38,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 380 transitions, 6582 flow [2024-06-14 13:35:39,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 380 transitions, 6333 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:39,041 INFO L231 Difference]: Finished difference. Result has 199 places, 337 transitions, 5442 flow [2024-06-14 13:35:39,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5442, PETRI_PLACES=199, PETRI_TRANSITIONS=337} [2024-06-14 13:35:39,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 13:35:39,041 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 337 transitions, 5442 flow [2024-06-14 13:35:39,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:39,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:39,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:39,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:35:39,042 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:39,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1770134520, now seen corresponding path program 5 times [2024-06-14 13:35:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:39,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089049906] [2024-06-14 13:35:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:40,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:40,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089049906] [2024-06-14 13:35:40,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089049906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:40,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:40,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108714854] [2024-06-14 13:35:40,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:40,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:40,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:40,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 337 transitions, 5442 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:40,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:40,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:41,585 INFO L124 PetriNetUnfolderBase]: 4121/6546 cut-off events. [2024-06-14 13:35:41,586 INFO L125 PetriNetUnfolderBase]: For 307148/307148 co-relation queries the response was YES. [2024-06-14 13:35:41,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59292 conditions, 6546 events. 4121/6546 cut-off events. For 307148/307148 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 40249 event pairs, 944 based on Foata normal form. 5/6549 useless extension candidates. Maximal degree in co-relation 59192. Up to 5620 conditions per place. [2024-06-14 13:35:41,665 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 290 selfloop transitions, 94 changer transitions 0/389 dead transitions. [2024-06-14 13:35:41,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 389 transitions, 6783 flow [2024-06-14 13:35:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:35:41,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2024-06-14 13:35:41,666 INFO L175 Difference]: Start difference. First operand has 199 places, 337 transitions, 5442 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:35:41,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 389 transitions, 6783 flow [2024-06-14 13:35:42,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 389 transitions, 6441 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:42,168 INFO L231 Difference]: Finished difference. Result has 204 places, 347 transitions, 5544 flow [2024-06-14 13:35:42,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5544, PETRI_PLACES=204, PETRI_TRANSITIONS=347} [2024-06-14 13:35:42,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-14 13:35:42,168 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 347 transitions, 5544 flow [2024-06-14 13:35:42,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:42,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:42,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:42,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:35:42,169 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)] === [2024-06-14 13:35:42,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1705168306, now seen corresponding path program 1 times [2024-06-14 13:35:42,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:42,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851224000] [2024-06-14 13:35:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:42,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851224000] [2024-06-14 13:35:42,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851224000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:42,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:42,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603536513] [2024-06-14 13:35:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:42,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:42,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 347 transitions, 5544 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:42,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:42,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:42,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:44,073 INFO L124 PetriNetUnfolderBase]: 4213/6680 cut-off events. [2024-06-14 13:35:44,073 INFO L125 PetriNetUnfolderBase]: For 325839/325839 co-relation queries the response was YES. [2024-06-14 13:35:44,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60845 conditions, 6680 events. 4213/6680 cut-off events. For 325839/325839 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 41136 event pairs, 1002 based on Foata normal form. 12/6690 useless extension candidates. Maximal degree in co-relation 60743. Up to 5735 conditions per place. [2024-06-14 13:35:44,152 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 292 selfloop transitions, 91 changer transitions 0/388 dead transitions. [2024-06-14 13:35:44,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 388 transitions, 7010 flow [2024-06-14 13:35:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 13:35:44,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-14 13:35:44,153 INFO L175 Difference]: Start difference. First operand has 204 places, 347 transitions, 5544 flow. Second operand 7 states and 143 transitions. [2024-06-14 13:35:44,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 388 transitions, 7010 flow [2024-06-14 13:35:44,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 388 transitions, 6636 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:44,725 INFO L231 Difference]: Finished difference. Result has 205 places, 364 transitions, 5796 flow [2024-06-14 13:35:44,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5194, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5796, PETRI_PLACES=205, PETRI_TRANSITIONS=364} [2024-06-14 13:35:44,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 13:35:44,726 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 364 transitions, 5796 flow [2024-06-14 13:35:44,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:44,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:44,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:44,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:35:44,726 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:44,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1281132642, now seen corresponding path program 2 times [2024-06-14 13:35:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361320759] [2024-06-14 13:35:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:45,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361320759] [2024-06-14 13:35:45,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361320759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:45,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:45,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109755942] [2024-06-14 13:35:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:45,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:45,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:45,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 364 transitions, 5796 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:45,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:45,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:45,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:46,524 INFO L124 PetriNetUnfolderBase]: 4243/6724 cut-off events. [2024-06-14 13:35:46,524 INFO L125 PetriNetUnfolderBase]: For 327974/327974 co-relation queries the response was YES. [2024-06-14 13:35:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61233 conditions, 6724 events. 4243/6724 cut-off events. For 327974/327974 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41465 event pairs, 1180 based on Foata normal form. 6/6728 useless extension candidates. Maximal degree in co-relation 61129. Up to 6409 conditions per place. [2024-06-14 13:35:46,599 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 25 changer transitions 0/382 dead transitions. [2024-06-14 13:35:46,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 382 transitions, 6749 flow [2024-06-14 13:35:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:35:46,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:35:46,600 INFO L175 Difference]: Start difference. First operand has 205 places, 364 transitions, 5796 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:35:46,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 382 transitions, 6749 flow [2024-06-14 13:35:47,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 382 transitions, 6614 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:47,126 INFO L231 Difference]: Finished difference. Result has 209 places, 370 transitions, 5879 flow [2024-06-14 13:35:47,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5879, PETRI_PLACES=209, PETRI_TRANSITIONS=370} [2024-06-14 13:35:47,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 13:35:47,127 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 370 transitions, 5879 flow [2024-06-14 13:35:47,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:47,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:47,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:47,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:35:47,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:47,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1709809936, now seen corresponding path program 3 times [2024-06-14 13:35:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:47,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815861062] [2024-06-14 13:35:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815861062] [2024-06-14 13:35:47,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815861062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:47,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:47,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:47,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708519573] [2024-06-14 13:35:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:47,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:47,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 370 transitions, 5879 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:47,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:47,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:47,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:48,923 INFO L124 PetriNetUnfolderBase]: 4233/6699 cut-off events. [2024-06-14 13:35:48,923 INFO L125 PetriNetUnfolderBase]: For 333839/333839 co-relation queries the response was YES. [2024-06-14 13:35:48,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60612 conditions, 6699 events. 4233/6699 cut-off events. For 333839/333839 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41216 event pairs, 1159 based on Foata normal form. 6/6703 useless extension candidates. Maximal degree in co-relation 60507. Up to 6290 conditions per place. [2024-06-14 13:35:48,995 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 340 selfloop transitions, 41 changer transitions 0/386 dead transitions. [2024-06-14 13:35:48,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 386 transitions, 6819 flow [2024-06-14 13:35:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:35:48,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-14 13:35:48,997 INFO L175 Difference]: Start difference. First operand has 209 places, 370 transitions, 5879 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:35:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 386 transitions, 6819 flow [2024-06-14 13:35:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 386 transitions, 6727 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:49,463 INFO L231 Difference]: Finished difference. Result has 211 places, 370 transitions, 5881 flow [2024-06-14 13:35:49,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5881, PETRI_PLACES=211, PETRI_TRANSITIONS=370} [2024-06-14 13:35:49,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-14 13:35:49,464 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 370 transitions, 5881 flow [2024-06-14 13:35:49,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:49,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:49,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:49,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:35:49,464 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:49,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1794795862, now seen corresponding path program 1 times [2024-06-14 13:35:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060488461] [2024-06-14 13:35:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:50,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:50,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060488461] [2024-06-14 13:35:50,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060488461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:50,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:50,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:50,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813012877] [2024-06-14 13:35:50,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:50,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:50,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:50,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:50,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 370 transitions, 5881 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:50,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:50,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:50,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:51,719 INFO L124 PetriNetUnfolderBase]: 4272/6772 cut-off events. [2024-06-14 13:35:51,719 INFO L125 PetriNetUnfolderBase]: For 350077/350077 co-relation queries the response was YES. [2024-06-14 13:35:51,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61169 conditions, 6772 events. 4272/6772 cut-off events. For 350077/350077 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41671 event pairs, 1168 based on Foata normal form. 14/6783 useless extension candidates. Maximal degree in co-relation 61065. Up to 6355 conditions per place. [2024-06-14 13:35:51,796 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 49 changer transitions 0/392 dead transitions. [2024-06-14 13:35:51,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 392 transitions, 6864 flow [2024-06-14 13:35:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:35:51,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:35:51,797 INFO L175 Difference]: Start difference. First operand has 211 places, 370 transitions, 5881 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:35:51,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 392 transitions, 6864 flow [2024-06-14 13:35:52,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 392 transitions, 6440 flow, removed 38 selfloop flow, removed 11 redundant places. [2024-06-14 13:35:52,350 INFO L231 Difference]: Finished difference. Result has 209 places, 374 transitions, 5629 flow [2024-06-14 13:35:52,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5459, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5629, PETRI_PLACES=209, PETRI_TRANSITIONS=374} [2024-06-14 13:35:52,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 13:35:52,350 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 374 transitions, 5629 flow [2024-06-14 13:35:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:52,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:52,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:52,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:35:52,351 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:52,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 491251441, now seen corresponding path program 1 times [2024-06-14 13:35:52,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:52,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044004679] [2024-06-14 13:35:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:52,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:53,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:53,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044004679] [2024-06-14 13:35:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044004679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:53,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092732804] [2024-06-14 13:35:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:53,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:53,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 374 transitions, 5629 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:53,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:53,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:53,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:54,676 INFO L124 PetriNetUnfolderBase]: 4496/7119 cut-off events. [2024-06-14 13:35:54,676 INFO L125 PetriNetUnfolderBase]: For 363604/363604 co-relation queries the response was YES. [2024-06-14 13:35:54,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63986 conditions, 7119 events. 4496/7119 cut-off events. For 363604/363604 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 44167 event pairs, 1172 based on Foata normal form. 6/7124 useless extension candidates. Maximal degree in co-relation 63884. Up to 6547 conditions per place. [2024-06-14 13:35:54,763 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 384 selfloop transitions, 71 changer transitions 0/460 dead transitions. [2024-06-14 13:35:54,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 460 transitions, 7699 flow [2024-06-14 13:35:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 13:35:54,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-14 13:35:54,764 INFO L175 Difference]: Start difference. First operand has 209 places, 374 transitions, 5629 flow. Second operand 10 states and 204 transitions. [2024-06-14 13:35:54,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 460 transitions, 7699 flow [2024-06-14 13:35:55,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 460 transitions, 7572 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:55,423 INFO L231 Difference]: Finished difference. Result has 219 places, 411 transitions, 6388 flow [2024-06-14 13:35:55,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6388, PETRI_PLACES=219, PETRI_TRANSITIONS=411} [2024-06-14 13:35:55,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 13:35:55,424 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 411 transitions, 6388 flow [2024-06-14 13:35:55,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:55,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:55,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:35:55,425 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:55,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash -686027765, now seen corresponding path program 2 times [2024-06-14 13:35:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:55,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444731194] [2024-06-14 13:35:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:56,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444731194] [2024-06-14 13:35:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444731194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:56,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:56,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373708310] [2024-06-14 13:35:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:56,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:56,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 411 transitions, 6388 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:56,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:56,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:57,925 INFO L124 PetriNetUnfolderBase]: 4742/7498 cut-off events. [2024-06-14 13:35:57,925 INFO L125 PetriNetUnfolderBase]: For 426456/426456 co-relation queries the response was YES. [2024-06-14 13:35:57,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69532 conditions, 7498 events. 4742/7498 cut-off events. For 426456/426456 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 46826 event pairs, 1141 based on Foata normal form. 16/7513 useless extension candidates. Maximal degree in co-relation 69424. Up to 6492 conditions per place. [2024-06-14 13:35:58,014 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 367 selfloop transitions, 90 changer transitions 0/462 dead transitions. [2024-06-14 13:35:58,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 462 transitions, 8080 flow [2024-06-14 13:35:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 13:35:58,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 13:35:58,015 INFO L175 Difference]: Start difference. First operand has 219 places, 411 transitions, 6388 flow. Second operand 9 states and 196 transitions. [2024-06-14 13:35:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 462 transitions, 8080 flow [2024-06-14 13:35:58,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 462 transitions, 7923 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-14 13:35:58,797 INFO L231 Difference]: Finished difference. Result has 227 places, 417 transitions, 6669 flow [2024-06-14 13:35:58,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6669, PETRI_PLACES=227, PETRI_TRANSITIONS=417} [2024-06-14 13:35:58,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-14 13:35:58,798 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 417 transitions, 6669 flow [2024-06-14 13:35:58,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:58,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:58,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:58,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:35:58,798 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:58,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -86255425, now seen corresponding path program 3 times [2024-06-14 13:35:58,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:58,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517304576] [2024-06-14 13:35:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:58,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:59,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517304576] [2024-06-14 13:35:59,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517304576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:59,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696161800] [2024-06-14 13:35:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:59,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:59,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 417 transitions, 6669 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:59,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:59,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:59,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:01,330 INFO L124 PetriNetUnfolderBase]: 4738/7498 cut-off events. [2024-06-14 13:36:01,330 INFO L125 PetriNetUnfolderBase]: For 435480/435480 co-relation queries the response was YES. [2024-06-14 13:36:01,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69945 conditions, 7498 events. 4738/7498 cut-off events. For 435480/435480 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 46922 event pairs, 1203 based on Foata normal form. 22/7519 useless extension candidates. Maximal degree in co-relation 69834. Up to 6843 conditions per place. [2024-06-14 13:36:01,428 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 368 selfloop transitions, 87 changer transitions 0/460 dead transitions. [2024-06-14 13:36:01,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 460 transitions, 8043 flow [2024-06-14 13:36:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 13:36:01,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-14 13:36:01,433 INFO L175 Difference]: Start difference. First operand has 227 places, 417 transitions, 6669 flow. Second operand 9 states and 191 transitions. [2024-06-14 13:36:01,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 460 transitions, 8043 flow [2024-06-14 13:36:02,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 460 transitions, 7838 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:02,409 INFO L231 Difference]: Finished difference. Result has 231 places, 422 transitions, 6846 flow [2024-06-14 13:36:02,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6846, PETRI_PLACES=231, PETRI_TRANSITIONS=422} [2024-06-14 13:36:02,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 13:36:02,410 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 422 transitions, 6846 flow [2024-06-14 13:36:02,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:02,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:02,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:36:02,411 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)] === [2024-06-14 13:36:02,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash -174969055, now seen corresponding path program 4 times [2024-06-14 13:36:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:02,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511824431] [2024-06-14 13:36:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:02,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511824431] [2024-06-14 13:36:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511824431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837837324] [2024-06-14 13:36:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:03,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:03,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:03,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 422 transitions, 6846 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:03,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:03,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:03,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:04,845 INFO L124 PetriNetUnfolderBase]: 4889/7732 cut-off events. [2024-06-14 13:36:04,845 INFO L125 PetriNetUnfolderBase]: For 439286/439286 co-relation queries the response was YES. [2024-06-14 13:36:04,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72201 conditions, 7732 events. 4889/7732 cut-off events. For 439286/439286 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48504 event pairs, 1129 based on Foata normal form. 14/7745 useless extension candidates. Maximal degree in co-relation 72088. Up to 7068 conditions per place. [2024-06-14 13:36:04,944 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 406 selfloop transitions, 61 changer transitions 0/472 dead transitions. [2024-06-14 13:36:04,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 472 transitions, 8430 flow [2024-06-14 13:36:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 13:36:04,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-14 13:36:04,946 INFO L175 Difference]: Start difference. First operand has 231 places, 422 transitions, 6846 flow. Second operand 9 states and 191 transitions. [2024-06-14 13:36:04,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 472 transitions, 8430 flow [2024-06-14 13:36:05,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 472 transitions, 8206 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:05,771 INFO L231 Difference]: Finished difference. Result has 236 places, 431 transitions, 7068 flow [2024-06-14 13:36:05,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7068, PETRI_PLACES=236, PETRI_TRANSITIONS=431} [2024-06-14 13:36:05,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-14 13:36:05,771 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 431 transitions, 7068 flow [2024-06-14 13:36:05,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:05,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:05,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:05,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:36:05,772 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:05,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash -86249473, now seen corresponding path program 1 times [2024-06-14 13:36:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:05,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640894432] [2024-06-14 13:36:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640894432] [2024-06-14 13:36:06,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640894432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:06,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:06,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836362326] [2024-06-14 13:36:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:07,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:07,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 431 transitions, 7068 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:07,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:07,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:07,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:08,959 INFO L124 PetriNetUnfolderBase]: 5124/8131 cut-off events. [2024-06-14 13:36:08,959 INFO L125 PetriNetUnfolderBase]: For 530055/530055 co-relation queries the response was YES. [2024-06-14 13:36:09,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76518 conditions, 8131 events. 5124/8131 cut-off events. For 530055/530055 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 51841 event pairs, 1345 based on Foata normal form. 58/8188 useless extension candidates. Maximal degree in co-relation 76402. Up to 6956 conditions per place. [2024-06-14 13:36:09,056 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 377 selfloop transitions, 96 changer transitions 0/478 dead transitions. [2024-06-14 13:36:09,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 478 transitions, 8464 flow [2024-06-14 13:36:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:36:09,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-14 13:36:09,058 INFO L175 Difference]: Start difference. First operand has 236 places, 431 transitions, 7068 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:36:09,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 478 transitions, 8464 flow [2024-06-14 13:36:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 478 transitions, 8256 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:10,013 INFO L231 Difference]: Finished difference. Result has 242 places, 433 transitions, 7187 flow [2024-06-14 13:36:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7187, PETRI_PLACES=242, PETRI_TRANSITIONS=433} [2024-06-14 13:36:10,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 13:36:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 433 transitions, 7187 flow [2024-06-14 13:36:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:10,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:10,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:10,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:36:10,014 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:10,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:10,014 INFO L85 PathProgramCache]: Analyzing trace with hash 32501537, now seen corresponding path program 5 times [2024-06-14 13:36:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496500501] [2024-06-14 13:36:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:10,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:10,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:10,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496500501] [2024-06-14 13:36:10,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496500501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:10,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:10,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:10,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444521078] [2024-06-14 13:36:10,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:10,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:10,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:10,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 433 transitions, 7187 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:10,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:10,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:12,762 INFO L124 PetriNetUnfolderBase]: 5286/8381 cut-off events. [2024-06-14 13:36:12,762 INFO L125 PetriNetUnfolderBase]: For 516945/516945 co-relation queries the response was YES. [2024-06-14 13:36:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79819 conditions, 8381 events. 5286/8381 cut-off events. For 516945/516945 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 53642 event pairs, 1324 based on Foata normal form. 16/8396 useless extension candidates. Maximal degree in co-relation 79701. Up to 7566 conditions per place. [2024-06-14 13:36:12,871 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 427 selfloop transitions, 56 changer transitions 0/488 dead transitions. [2024-06-14 13:36:12,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 488 transitions, 9022 flow [2024-06-14 13:36:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:36:12,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-14 13:36:12,872 INFO L175 Difference]: Start difference. First operand has 242 places, 433 transitions, 7187 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:36:12,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 488 transitions, 9022 flow [2024-06-14 13:36:14,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 488 transitions, 8781 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 13:36:14,014 INFO L231 Difference]: Finished difference. Result has 245 places, 444 transitions, 7398 flow [2024-06-14 13:36:14,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7398, PETRI_PLACES=245, PETRI_TRANSITIONS=444} [2024-06-14 13:36:14,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 13:36:14,015 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 444 transitions, 7398 flow [2024-06-14 13:36:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:36:14,015 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)] === [2024-06-14 13:36:14,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:14,015 INFO L85 PathProgramCache]: Analyzing trace with hash -712148751, now seen corresponding path program 2 times [2024-06-14 13:36:14,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:14,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106694087] [2024-06-14 13:36:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:14,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106694087] [2024-06-14 13:36:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106694087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:15,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:15,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091065924] [2024-06-14 13:36:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:15,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:15,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 444 transitions, 7398 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:15,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:15,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:15,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:17,106 INFO L124 PetriNetUnfolderBase]: 5598/8913 cut-off events. [2024-06-14 13:36:17,106 INFO L125 PetriNetUnfolderBase]: For 602361/602361 co-relation queries the response was YES. [2024-06-14 13:36:17,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84696 conditions, 8913 events. 5598/8913 cut-off events. For 602361/602361 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 57886 event pairs, 1418 based on Foata normal form. 58/8970 useless extension candidates. Maximal degree in co-relation 84575. Up to 7863 conditions per place. [2024-06-14 13:36:17,224 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 419 selfloop transitions, 74 changer transitions 0/498 dead transitions. [2024-06-14 13:36:17,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 498 transitions, 8941 flow [2024-06-14 13:36:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:36:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:36:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-14 13:36:17,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2024-06-14 13:36:17,225 INFO L175 Difference]: Start difference. First operand has 245 places, 444 transitions, 7398 flow. Second operand 11 states and 233 transitions. [2024-06-14 13:36:17,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 498 transitions, 8941 flow [2024-06-14 13:36:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 498 transitions, 8775 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:18,576 INFO L231 Difference]: Finished difference. Result has 253 places, 449 transitions, 7591 flow [2024-06-14 13:36:18,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7591, PETRI_PLACES=253, PETRI_TRANSITIONS=449} [2024-06-14 13:36:18,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-14 13:36:18,577 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 449 transitions, 7591 flow [2024-06-14 13:36:18,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:18,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:18,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:18,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:36:18,577 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)] === [2024-06-14 13:36:18,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash 232166399, now seen corresponding path program 3 times [2024-06-14 13:36:18,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:18,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281642745] [2024-06-14 13:36:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281642745] [2024-06-14 13:36:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281642745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141383679] [2024-06-14 13:36:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:19,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 449 transitions, 7591 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:19,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:19,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:19,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:22,036 INFO L124 PetriNetUnfolderBase]: 6401/10312 cut-off events. [2024-06-14 13:36:22,037 INFO L125 PetriNetUnfolderBase]: For 683414/683414 co-relation queries the response was YES. [2024-06-14 13:36:22,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96331 conditions, 10312 events. 6401/10312 cut-off events. For 683414/683414 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69410 event pairs, 1602 based on Foata normal form. 48/10359 useless extension candidates. Maximal degree in co-relation 96208. Up to 7467 conditions per place. [2024-06-14 13:36:22,150 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 358 selfloop transitions, 166 changer transitions 0/529 dead transitions. [2024-06-14 13:36:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 529 transitions, 10042 flow [2024-06-14 13:36:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 13:36:22,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-14 13:36:22,151 INFO L175 Difference]: Start difference. First operand has 253 places, 449 transitions, 7591 flow. Second operand 10 states and 223 transitions. [2024-06-14 13:36:22,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 529 transitions, 10042 flow [2024-06-14 13:36:23,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 529 transitions, 9859 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 13:36:23,428 INFO L231 Difference]: Finished difference. Result has 259 places, 472 transitions, 8564 flow [2024-06-14 13:36:23,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8564, PETRI_PLACES=259, PETRI_TRANSITIONS=472} [2024-06-14 13:36:23,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:36:23,429 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 472 transitions, 8564 flow [2024-06-14 13:36:23,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:23,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:23,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:36:23,429 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:23,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 236583194, now seen corresponding path program 1 times [2024-06-14 13:36:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:23,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921604352] [2024-06-14 13:36:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:23,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921604352] [2024-06-14 13:36:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921604352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:23,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:23,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163100243] [2024-06-14 13:36:23,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:23,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:23,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:23,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:23,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 472 transitions, 8564 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:23,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:23,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:26,229 INFO L124 PetriNetUnfolderBase]: 6389/10277 cut-off events. [2024-06-14 13:36:26,229 INFO L125 PetriNetUnfolderBase]: For 638033/638033 co-relation queries the response was YES. [2024-06-14 13:36:26,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97367 conditions, 10277 events. 6389/10277 cut-off events. For 638033/638033 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69169 event pairs, 1994 based on Foata normal form. 4/10280 useless extension candidates. Maximal degree in co-relation 97239. Up to 9772 conditions per place. [2024-06-14 13:36:26,358 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 435 selfloop transitions, 52 changer transitions 0/492 dead transitions. [2024-06-14 13:36:26,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 492 transitions, 9727 flow [2024-06-14 13:36:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 13:36:26,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-14 13:36:26,359 INFO L175 Difference]: Start difference. First operand has 259 places, 472 transitions, 8564 flow. Second operand 7 states and 142 transitions. [2024-06-14 13:36:26,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 492 transitions, 9727 flow [2024-06-14 13:36:27,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 492 transitions, 9470 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:27,941 INFO L231 Difference]: Finished difference. Result has 262 places, 472 transitions, 8425 flow [2024-06-14 13:36:27,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8425, PETRI_PLACES=262, PETRI_TRANSITIONS=472} [2024-06-14 13:36:27,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 13:36:27,941 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 472 transitions, 8425 flow [2024-06-14 13:36:27,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:27,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:27,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:27,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:36:27,942 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:27,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1641091080, now seen corresponding path program 2 times [2024-06-14 13:36:27,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:27,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656612838] [2024-06-14 13:36:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:27,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:28,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:28,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656612838] [2024-06-14 13:36:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656612838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:28,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454540868] [2024-06-14 13:36:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:28,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:28,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:28,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:28,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:28,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 472 transitions, 8425 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:28,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:28,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:28,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:30,689 INFO L124 PetriNetUnfolderBase]: 6399/10301 cut-off events. [2024-06-14 13:36:30,690 INFO L125 PetriNetUnfolderBase]: For 639171/639171 co-relation queries the response was YES. [2024-06-14 13:36:30,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96881 conditions, 10301 events. 6399/10301 cut-off events. For 639171/639171 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69546 event pairs, 2017 based on Foata normal form. 2/10302 useless extension candidates. Maximal degree in co-relation 96752. Up to 9930 conditions per place. [2024-06-14 13:36:30,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 458 selfloop transitions, 30 changer transitions 0/493 dead transitions. [2024-06-14 13:36:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 493 transitions, 9604 flow [2024-06-14 13:36:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:36:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 13:36:30,835 INFO L175 Difference]: Start difference. First operand has 262 places, 472 transitions, 8425 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:36:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 493 transitions, 9604 flow [2024-06-14 13:36:32,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 493 transitions, 9514 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:32,318 INFO L231 Difference]: Finished difference. Result has 265 places, 478 transitions, 8554 flow [2024-06-14 13:36:32,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8554, PETRI_PLACES=265, PETRI_TRANSITIONS=478} [2024-06-14 13:36:32,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-14 13:36:32,319 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 478 transitions, 8554 flow [2024-06-14 13:36:32,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:32,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:32,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:32,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:36:32,319 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:32,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1167210635, now seen corresponding path program 6 times [2024-06-14 13:36:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:32,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608442437] [2024-06-14 13:36:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:32,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:33,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:33,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608442437] [2024-06-14 13:36:33,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608442437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:33,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:33,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719717575] [2024-06-14 13:36:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:33,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:33,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:33,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:33,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 478 transitions, 8554 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:33,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:33,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:33,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:35,580 INFO L124 PetriNetUnfolderBase]: 6569/10570 cut-off events. [2024-06-14 13:36:35,580 INFO L125 PetriNetUnfolderBase]: For 707257/707257 co-relation queries the response was YES. [2024-06-14 13:36:35,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100199 conditions, 10570 events. 6569/10570 cut-off events. For 707257/707257 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71481 event pairs, 1764 based on Foata normal form. 16/10583 useless extension candidates. Maximal degree in co-relation 100069. Up to 9022 conditions per place. [2024-06-14 13:36:35,747 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 425 selfloop transitions, 104 changer transitions 0/534 dead transitions. [2024-06-14 13:36:35,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 534 transitions, 10703 flow [2024-06-14 13:36:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 13:36:35,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 13:36:35,748 INFO L175 Difference]: Start difference. First operand has 265 places, 478 transitions, 8554 flow. Second operand 9 states and 196 transitions. [2024-06-14 13:36:35,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 534 transitions, 10703 flow [2024-06-14 13:36:37,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 534 transitions, 10630 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:37,835 INFO L231 Difference]: Finished difference. Result has 272 places, 487 transitions, 9063 flow [2024-06-14 13:36:37,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8481, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9063, PETRI_PLACES=272, PETRI_TRANSITIONS=487} [2024-06-14 13:36:37,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 13:36:37,836 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 487 transitions, 9063 flow [2024-06-14 13:36:37,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:37,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:37,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:37,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:36:37,837 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:37,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:37,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2135627107, now seen corresponding path program 4 times [2024-06-14 13:36:37,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:37,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137084004] [2024-06-14 13:36:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:38,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:38,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137084004] [2024-06-14 13:36:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137084004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:38,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:38,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588067646] [2024-06-14 13:36:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:38,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:38,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:38,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 487 transitions, 9063 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:38,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:38,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:38,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:42,133 INFO L124 PetriNetUnfolderBase]: 7086/11463 cut-off events. [2024-06-14 13:36:42,133 INFO L125 PetriNetUnfolderBase]: For 906039/906039 co-relation queries the response was YES. [2024-06-14 13:36:42,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112342 conditions, 11463 events. 7086/11463 cut-off events. For 906039/906039 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 79244 event pairs, 1899 based on Foata normal form. 54/11514 useless extension candidates. Maximal degree in co-relation 112209. Up to 8792 conditions per place. [2024-06-14 13:36:42,269 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 420 selfloop transitions, 123 changer transitions 0/548 dead transitions. [2024-06-14 13:36:42,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 548 transitions, 11265 flow [2024-06-14 13:36:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:36:42,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 13:36:42,270 INFO L175 Difference]: Start difference. First operand has 272 places, 487 transitions, 9063 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:36:42,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 548 transitions, 11265 flow [2024-06-14 13:36:44,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 548 transitions, 11041 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:44,392 INFO L231 Difference]: Finished difference. Result has 279 places, 492 transitions, 9393 flow [2024-06-14 13:36:44,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9393, PETRI_PLACES=279, PETRI_TRANSITIONS=492} [2024-06-14 13:36:44,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-14 13:36:44,393 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 492 transitions, 9393 flow [2024-06-14 13:36:44,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:44,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:44,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:36:44,394 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:44,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2135894017, now seen corresponding path program 5 times [2024-06-14 13:36:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:44,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375071685] [2024-06-14 13:36:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:45,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:45,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375071685] [2024-06-14 13:36:45,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375071685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:45,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:45,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406194954] [2024-06-14 13:36:45,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:45,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:45,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:45,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:45,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 492 transitions, 9393 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:45,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:45,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:45,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:49,145 INFO L124 PetriNetUnfolderBase]: 7174/11619 cut-off events. [2024-06-14 13:36:49,146 INFO L125 PetriNetUnfolderBase]: For 886019/886019 co-relation queries the response was YES. [2024-06-14 13:36:49,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111514 conditions, 11619 events. 7174/11619 cut-off events. For 886019/886019 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 80717 event pairs, 2066 based on Foata normal form. 58/11674 useless extension candidates. Maximal degree in co-relation 111379. Up to 9985 conditions per place. [2024-06-14 13:36:49,289 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 420 selfloop transitions, 121 changer transitions 0/546 dead transitions. [2024-06-14 13:36:49,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 546 transitions, 11071 flow [2024-06-14 13:36:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:36:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:36:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 13:36:49,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086580086580087 [2024-06-14 13:36:49,290 INFO L175 Difference]: Start difference. First operand has 279 places, 492 transitions, 9393 flow. Second operand 11 states and 235 transitions. [2024-06-14 13:36:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 546 transitions, 11071 flow [2024-06-14 13:36:51,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 546 transitions, 10815 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:51,273 INFO L231 Difference]: Finished difference. Result has 284 places, 495 transitions, 9464 flow [2024-06-14 13:36:51,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9137, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9464, PETRI_PLACES=284, PETRI_TRANSITIONS=495} [2024-06-14 13:36:51,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 13:36:51,274 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 495 transitions, 9464 flow [2024-06-14 13:36:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:51,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:51,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:51,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:36:51,274 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)] === [2024-06-14 13:36:51,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 110087739, now seen corresponding path program 6 times [2024-06-14 13:36:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:51,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30363726] [2024-06-14 13:36:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:51,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30363726] [2024-06-14 13:36:52,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30363726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:52,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405143310] [2024-06-14 13:36:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:52,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:52,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 495 transitions, 9464 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:52,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:52,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:52,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:56,113 INFO L124 PetriNetUnfolderBase]: 8490/13927 cut-off events. [2024-06-14 13:36:56,113 INFO L125 PetriNetUnfolderBase]: For 1115965/1115965 co-relation queries the response was YES. [2024-06-14 13:36:56,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134202 conditions, 13927 events. 8490/13927 cut-off events. For 1115965/1115965 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 101281 event pairs, 2458 based on Foata normal form. 48/13970 useless extension candidates. Maximal degree in co-relation 134065. Up to 6337 conditions per place. [2024-06-14 13:36:56,304 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 292 selfloop transitions, 272 changer transitions 0/569 dead transitions. [2024-06-14 13:36:56,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 569 transitions, 12179 flow [2024-06-14 13:36:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 13:36:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-14 13:36:56,305 INFO L175 Difference]: Start difference. First operand has 284 places, 495 transitions, 9464 flow. Second operand 10 states and 227 transitions. [2024-06-14 13:36:56,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 569 transitions, 12179 flow [2024-06-14 13:36:58,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 569 transitions, 11846 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-14 13:36:58,598 INFO L231 Difference]: Finished difference. Result has 286 places, 504 transitions, 10132 flow [2024-06-14 13:36:58,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10132, PETRI_PLACES=286, PETRI_TRANSITIONS=504} [2024-06-14 13:36:58,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 13:36:58,599 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 504 transitions, 10132 flow [2024-06-14 13:36:58,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:58,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:58,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:36:58,599 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)] === [2024-06-14 13:36:58,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -203611491, now seen corresponding path program 7 times [2024-06-14 13:36:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:58,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106021964] [2024-06-14 13:36:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:59,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106021964] [2024-06-14 13:36:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106021964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:59,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773378641] [2024-06-14 13:36:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:59,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:59,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:59,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 504 transitions, 10132 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:59,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:59,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:03,705 INFO L124 PetriNetUnfolderBase]: 9093/14927 cut-off events. [2024-06-14 13:37:03,705 INFO L125 PetriNetUnfolderBase]: For 1280233/1280233 co-relation queries the response was YES. [2024-06-14 13:37:03,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147508 conditions, 14927 events. 9093/14927 cut-off events. For 1280233/1280233 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 110962 event pairs, 2794 based on Foata normal form. 48/14970 useless extension candidates. Maximal degree in co-relation 147368. Up to 11904 conditions per place. [2024-06-14 13:37:03,948 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 294 selfloop transitions, 266 changer transitions 0/565 dead transitions. [2024-06-14 13:37:03,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 565 transitions, 12518 flow [2024-06-14 13:37:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:37:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:37:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 13:37:03,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 13:37:03,949 INFO L175 Difference]: Start difference. First operand has 286 places, 504 transitions, 10132 flow. Second operand 10 states and 224 transitions. [2024-06-14 13:37:03,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 565 transitions, 12518 flow [2024-06-14 13:37:06,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 565 transitions, 12075 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:06,760 INFO L231 Difference]: Finished difference. Result has 292 places, 512 transitions, 10628 flow [2024-06-14 13:37:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9689, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10628, PETRI_PLACES=292, PETRI_TRANSITIONS=512} [2024-06-14 13:37:06,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 13:37:06,760 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 512 transitions, 10628 flow [2024-06-14 13:37:06,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:06,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:06,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:37:06,761 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)] === [2024-06-14 13:37:06,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash -203878401, now seen corresponding path program 8 times [2024-06-14 13:37:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:06,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859208922] [2024-06-14 13:37:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:07,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859208922] [2024-06-14 13:37:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859208922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:07,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:07,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:37:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251203888] [2024-06-14 13:37:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:37:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:37:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:37:07,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:37:07,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 512 transitions, 10628 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:07,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:07,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:37:07,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:11,993 INFO L124 PetriNetUnfolderBase]: 9013/14802 cut-off events. [2024-06-14 13:37:11,994 INFO L125 PetriNetUnfolderBase]: For 1239575/1239575 co-relation queries the response was YES. [2024-06-14 13:37:12,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144760 conditions, 14802 events. 9013/14802 cut-off events. For 1239575/1239575 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 110051 event pairs, 2886 based on Foata normal form. 58/14855 useless extension candidates. Maximal degree in co-relation 144617. Up to 12376 conditions per place. [2024-06-14 13:37:12,237 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 290 selfloop transitions, 262 changer transitions 0/557 dead transitions. [2024-06-14 13:37:12,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 557 transitions, 12336 flow [2024-06-14 13:37:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:37:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:37:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 13:37:12,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 13:37:12,238 INFO L175 Difference]: Start difference. First operand has 292 places, 512 transitions, 10628 flow. Second operand 10 states and 217 transitions. [2024-06-14 13:37:12,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 557 transitions, 12336 flow [2024-06-14 13:37:15,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 557 transitions, 11827 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:15,432 INFO L231 Difference]: Finished difference. Result has 295 places, 512 transitions, 10652 flow [2024-06-14 13:37:15,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10652, PETRI_PLACES=295, PETRI_TRANSITIONS=512} [2024-06-14 13:37:15,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 13:37:15,433 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 512 transitions, 10652 flow [2024-06-14 13:37:15,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:15,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:15,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:15,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:37:15,433 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)] === [2024-06-14 13:37:15,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:15,434 INFO L85 PathProgramCache]: Analyzing trace with hash 723717775, now seen corresponding path program 9 times [2024-06-14 13:37:15,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:15,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954898132] [2024-06-14 13:37:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:15,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:16,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954898132] [2024-06-14 13:37:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954898132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:37:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235386575] [2024-06-14 13:37:16,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:16,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:37:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:37:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:37:16,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:37:16,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 512 transitions, 10652 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:16,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:16,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:37:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:20,808 INFO L124 PetriNetUnfolderBase]: 9535/15751 cut-off events. [2024-06-14 13:37:20,808 INFO L125 PetriNetUnfolderBase]: For 1391189/1391189 co-relation queries the response was YES. [2024-06-14 13:37:20,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154615 conditions, 15751 events. 9535/15751 cut-off events. For 1391189/1391189 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 119326 event pairs, 3225 based on Foata normal form. 72/15820 useless extension candidates. Maximal degree in co-relation 154471. Up to 12399 conditions per place. [2024-06-14 13:37:21,077 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 433 selfloop transitions, 134 changer transitions 0/572 dead transitions. [2024-06-14 13:37:21,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 572 transitions, 12881 flow [2024-06-14 13:37:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:37:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:37:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:37:21,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 13:37:21,079 INFO L175 Difference]: Start difference. First operand has 295 places, 512 transitions, 10652 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:37:21,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 572 transitions, 12881 flow [2024-06-14 13:37:23,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 572 transitions, 12288 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-14 13:37:23,952 INFO L231 Difference]: Finished difference. Result has 297 places, 516 transitions, 10568 flow [2024-06-14 13:37:23,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10059, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10568, PETRI_PLACES=297, PETRI_TRANSITIONS=516} [2024-06-14 13:37:23,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-14 13:37:23,953 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 516 transitions, 10568 flow [2024-06-14 13:37:23,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:23,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:23,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:37:23,953 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:23,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash 723450865, now seen corresponding path program 10 times [2024-06-14 13:37:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594819600] [2024-06-14 13:37:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:23,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594819600] [2024-06-14 13:37:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594819600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:25,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:37:25,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170413992] [2024-06-14 13:37:25,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:25,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:37:25,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:37:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:37:25,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:37:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 516 transitions, 10568 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:37:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:29,540 INFO L124 PetriNetUnfolderBase]: 9455/15615 cut-off events. [2024-06-14 13:37:29,541 INFO L125 PetriNetUnfolderBase]: For 1302327/1302327 co-relation queries the response was YES. [2024-06-14 13:37:29,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149916 conditions, 15615 events. 9455/15615 cut-off events. For 1302327/1302327 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 118316 event pairs, 3371 based on Foata normal form. 58/15670 useless extension candidates. Maximal degree in co-relation 149771. Up to 13867 conditions per place. [2024-06-14 13:37:29,936 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 433 selfloop transitions, 131 changer transitions 0/569 dead transitions. [2024-06-14 13:37:29,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 569 transitions, 12294 flow [2024-06-14 13:37:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:37:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:37:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-14 13:37:29,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-06-14 13:37:29,939 INFO L175 Difference]: Start difference. First operand has 297 places, 516 transitions, 10568 flow. Second operand 11 states and 234 transitions. [2024-06-14 13:37:29,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 569 transitions, 12294 flow [2024-06-14 13:37:33,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 569 transitions, 11997 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:33,243 INFO L231 Difference]: Finished difference. Result has 302 places, 518 transitions, 10598 flow [2024-06-14 13:37:33,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10271, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10598, PETRI_PLACES=302, PETRI_TRANSITIONS=518} [2024-06-14 13:37:33,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-14 13:37:33,244 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 518 transitions, 10598 flow [2024-06-14 13:37:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:33,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:33,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:37:33,244 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:33,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1308216104, now seen corresponding path program 3 times [2024-06-14 13:37:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343160519] [2024-06-14 13:37:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat