./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix056_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/mix056_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/mix056_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix056_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 12:38:35,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:38:35,393 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:38:35,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:38:35,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:38:35,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:38:35,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:38:35,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:38:35,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:38:35,413 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:38:35,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:38:35,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:38:35,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:38:35,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:38:35,415 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:38:35,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:38:35,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:38:35,416 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:38:35,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:38:35,416 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:38:35,417 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:38:35,417 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:38:35,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:38:35,418 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:38:35,418 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:38:35,418 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:38:35,418 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:38:35,419 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:38:35,419 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:38:35,419 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:38:35,419 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:38:35,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:38:35,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:38:35,420 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:38:35,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:38:35,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:38:35,420 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:38:35,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:38:35,421 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:38:35,421 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:38:35,421 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:38:35,421 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:38:35,422 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:38:35,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:38:35,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:38:35,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:38:35,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:38:35,655 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:38:35,657 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:38:35,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:38:36,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:38:36,892 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:38:36,893 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:38:36,904 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f96ffbdd/96662404fccb4963a6a456db45745442/FLAG22a2e1270 [2024-06-14 12:38:36,915 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f96ffbdd/96662404fccb4963a6a456db45745442 [2024-06-14 12:38:36,917 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:38:36,918 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:38:36,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:38:37,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:38:37,078 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:38:37,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:38:37,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:38:37,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:38:37,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:38:36" (1/2) ... [2024-06-14 12:38:37,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df0c069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:38:37, skipping insertion in model container [2024-06-14 12:38:37,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:38:36" (1/2) ... [2024-06-14 12:38:37,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e623839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:38:37, skipping insertion in model container [2024-06-14 12:38:37,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:37" (2/2) ... [2024-06-14 12:38:37,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df0c069 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:37, skipping insertion in model container [2024-06-14 12:38:37,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:37" (2/2) ... [2024-06-14 12:38:37,087 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:38:37,154 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:38:37,155 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 12:38:37,156 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 12:38:37,156 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 12:38:37,156 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:38:37,156 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-14 12:38:37,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:38:37,503 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:38:37,513 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:38:37,613 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:38:37,657 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:38:37,662 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:37 WrapperNode [2024-06-14 12:38:37,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:38:37,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:38:37,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:38:37,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:38:37,668 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,693 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,716 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-14 12:38:37,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:38:37,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:38:37,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:38:37,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:38:37,726 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,726 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,730 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,742 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 12:38:37,743 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,743 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,758 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,762 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,780 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,782 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:38:37,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:38:37,814 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:38:37,814 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:38:37,815 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 12:38:37" (1/1) ... [2024-06-14 12:38:37,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:38:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:38:37,881 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 12:38:37,895 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 12:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:38:37,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:38:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:38:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:38:37,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:38:37,919 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 12:38:38,048 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:38:38,050 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:38:38,328 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:38:38,328 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:38:38,461 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:38:38,461 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:38:38,462 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:38:38 BoogieIcfgContainer [2024-06-14 12:38:38,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:38:38,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:38:38,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:38:38,466 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:38:38,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:38:36" (1/4) ... [2024-06-14 12:38:38,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c21eeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:38:38, skipping insertion in model container [2024-06-14 12:38:38,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:37" (2/4) ... [2024-06-14 12:38:38,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c21eeec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:38:38, skipping insertion in model container [2024-06-14 12:38:38,468 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 12:38:37" (3/4) ... [2024-06-14 12:38:38,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c21eeec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:38:38, skipping insertion in model container [2024-06-14 12:38:38,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:38:38" (4/4) ... [2024-06-14 12:38:38,473 INFO L112 eAbstractionObserver]: Analyzing ICFG mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:38:38,485 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:38:38,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:38:38,486 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:38:38,557 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:38:38,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:38:38,607 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:38:38,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:38:38,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:38:38,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:38:38,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:38:38,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:38:38,629 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;@7edf1eb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:38:38,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:38:38,636 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:38:38,636 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:38:38,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:38:38,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:38,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:38:38,637 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 12:38:38,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1495991067, now seen corresponding path program 1 times [2024-06-14 12:38:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562702934] [2024-06-14 12:38:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:39,429 INFO 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 12:38:39,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562702934] [2024-06-14 12:38:39,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562702934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:39,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:39,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:38:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836352205] [2024-06-14 12:38:39,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:39,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:38:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:38:39,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:38:39,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:39,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 12:38:39,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:39,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:39,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:39,856 INFO L124 PetriNetUnfolderBase]: 1659/2478 cut-off events. [2024-06-14 12:38:39,856 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:38:39,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 2478 events. 1659/2478 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11231 event pairs, 1184 based on Foata normal form. 1/2438 useless extension candidates. Maximal degree in co-relation 5029. Up to 2465 conditions per place. [2024-06-14 12:38:39,875 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 12:38:39,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 177 flow [2024-06-14 12:38:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:38:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:38:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-14 12:38:39,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 12:38:39,888 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-14 12:38:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 177 flow [2024-06-14 12:38:39,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:39,894 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:38:39,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 12:38:39,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:38:39,899 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:38:39,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 12:38:39,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:39,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:39,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:38:39,900 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 12:38:39,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1166657604, now seen corresponding path program 1 times [2024-06-14 12:38:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:39,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235409230] [2024-06-14 12:38:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:39,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:40,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:40,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235409230] [2024-06-14 12:38:40,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235409230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:40,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:40,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:38:40,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800805243] [2024-06-14 12:38:40,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:38:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:38:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:38:40,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:40,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:40,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:40,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:40,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:40,780 INFO L124 PetriNetUnfolderBase]: 1653/2469 cut-off events. [2024-06-14 12:38:40,781 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-14 12:38:40,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5660 conditions, 2469 events. 1653/2469 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11184 event pairs, 1038 based on Foata normal form. 3/2471 useless extension candidates. Maximal degree in co-relation 5645. Up to 2441 conditions per place. [2024-06-14 12:38:40,793 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-14 12:38:40,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 244 flow [2024-06-14 12:38:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:38:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:38:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-14 12:38:40,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 12:38:40,797 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 88 transitions. [2024-06-14 12:38:40,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 244 flow [2024-06-14 12:38:40,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:38:40,800 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-14 12:38:40,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 12:38:40,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-14 12:38:40,801 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-14 12:38:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:40,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:40,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:40,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:38:40,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:40,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1806648318, now seen corresponding path program 1 times [2024-06-14 12:38:40,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:40,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241063162] [2024-06-14 12:38:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241063162] [2024-06-14 12:38:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241063162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:41,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:41,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:38:41,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757194180] [2024-06-14 12:38:41,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:41,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:38:41,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:38:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:38:41,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:41,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:41,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:41,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:41,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:41,659 INFO L124 PetriNetUnfolderBase]: 1661/2482 cut-off events. [2024-06-14 12:38:41,659 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-14 12:38:41,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6310 conditions, 2482 events. 1661/2482 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11227 event pairs, 812 based on Foata normal form. 5/2486 useless extension candidates. Maximal degree in co-relation 6293. Up to 2387 conditions per place. [2024-06-14 12:38:41,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-14 12:38:41,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 398 flow [2024-06-14 12:38:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 12:38:41,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 12:38:41,677 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 115 transitions. [2024-06-14 12:38:41,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 398 flow [2024-06-14 12:38:41,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:38:41,680 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-14 12:38:41,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-14 12:38:41,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 12:38:41,682 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-14 12:38:41,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:41,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:41,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:38:41,682 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 12:38:41,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 171524003, now seen corresponding path program 1 times [2024-06-14 12:38:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:41,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478922711] [2024-06-14 12:38:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:42,372 INFO 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 12:38:42,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:42,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478922711] [2024-06-14 12:38:42,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478922711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:42,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:42,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:42,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690544456] [2024-06-14 12:38:42,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:42,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:42,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:42,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 12:38:42,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:42,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:42,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:42,779 INFO L124 PetriNetUnfolderBase]: 1669/2494 cut-off events. [2024-06-14 12:38:42,779 INFO L125 PetriNetUnfolderBase]: For 3038/3040 co-relation queries the response was YES. [2024-06-14 12:38:42,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7429 conditions, 2494 events. 1669/2494 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11291 event pairs, 666 based on Foata normal form. 7/2500 useless extension candidates. Maximal degree in co-relation 7409. Up to 2373 conditions per place. [2024-06-14 12:38:42,792 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-14 12:38:42,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 525 flow [2024-06-14 12:38:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 12:38:42,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 12:38:42,794 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 135 transitions. [2024-06-14 12:38:42,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 525 flow [2024-06-14 12:38:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 517 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:38:42,798 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-14 12:38:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-14 12:38:42,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-14 12:38:42,799 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-14 12:38:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 12:38:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:42,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:38:42,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1022277821, now seen corresponding path program 1 times [2024-06-14 12:38:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844276397] [2024-06-14 12:38:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:43,512 INFO 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 12:38:43,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844276397] [2024-06-14 12:38:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844276397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:43,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:43,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856262006] [2024-06-14 12:38:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:43,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:43,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 12:38:43,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:43,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:43,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:43,966 INFO L124 PetriNetUnfolderBase]: 1681/2514 cut-off events. [2024-06-14 12:38:43,967 INFO L125 PetriNetUnfolderBase]: For 4787/4789 co-relation queries the response was YES. [2024-06-14 12:38:43,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 2514 events. 1681/2514 cut-off events. For 4787/4789 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11394 event pairs, 502 based on Foata normal form. 12/2525 useless extension candidates. Maximal degree in co-relation 8277. Up to 2341 conditions per place. [2024-06-14 12:38:43,980 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 66 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-14 12:38:43,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 626 flow [2024-06-14 12:38:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 12:38:43,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 12:38:43,982 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 7 states and 151 transitions. [2024-06-14 12:38:43,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 626 flow [2024-06-14 12:38:43,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 577 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:43,986 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 335 flow [2024-06-14 12:38:43,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-14 12:38:43,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 12:38:43,987 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 335 flow [2024-06-14 12:38:43,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 12:38:43,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:43,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:43,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:38:43,988 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 12:38:43,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash 552327518, now seen corresponding path program 1 times [2024-06-14 12:38:43,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:43,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661768240] [2024-06-14 12:38:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:43,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:44,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661768240] [2024-06-14 12:38:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661768240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:44,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:44,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829660016] [2024-06-14 12:38:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:44,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 12:38:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:44,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:44,808 INFO L124 PetriNetUnfolderBase]: 1676/2506 cut-off events. [2024-06-14 12:38:44,808 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-14 12:38:44,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8825 conditions, 2506 events. 1676/2506 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11331 event pairs, 659 based on Foata normal form. 2/2507 useless extension candidates. Maximal degree in co-relation 8801. Up to 2484 conditions per place. [2024-06-14 12:38:44,822 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 55 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-14 12:38:44,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 489 flow [2024-06-14 12:38:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-14 12:38:44,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-14 12:38:44,824 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 335 flow. Second operand 5 states and 87 transitions. [2024-06-14 12:38:44,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 489 flow [2024-06-14 12:38:44,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 425 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:44,828 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 295 flow [2024-06-14 12:38:44,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-14 12:38:44,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 12:38:44,829 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 295 flow [2024-06-14 12:38:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 12:38:44,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:44,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:44,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:38:44,830 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 12:38:44,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -58839168, now seen corresponding path program 1 times [2024-06-14 12:38:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172062113] [2024-06-14 12:38:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:45,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:45,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172062113] [2024-06-14 12:38:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172062113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:45,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:45,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:45,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699136030] [2024-06-14 12:38:45,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:45,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:45,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:38:45,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:45,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:45,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:45,900 INFO L124 PetriNetUnfolderBase]: 1708/2552 cut-off events. [2024-06-14 12:38:45,900 INFO L125 PetriNetUnfolderBase]: For 7708/7708 co-relation queries the response was YES. [2024-06-14 12:38:45,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 2552 events. 1708/2552 cut-off events. For 7708/7708 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11525 event pairs, 621 based on Foata normal form. 10/2561 useless extension candidates. Maximal degree in co-relation 8905. Up to 2402 conditions per place. [2024-06-14 12:38:45,912 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-14 12:38:45,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 613 flow [2024-06-14 12:38:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 12:38:45,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 12:38:45,914 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 295 flow. Second operand 6 states and 116 transitions. [2024-06-14 12:38:45,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 613 flow [2024-06-14 12:38:45,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 591 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:45,918 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 404 flow [2024-06-14 12:38:45,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-14 12:38:45,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 12:38:45,919 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 404 flow [2024-06-14 12:38:45,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:38:45,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:45,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:45,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:38:45,920 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 12:38:45,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1540263943, now seen corresponding path program 1 times [2024-06-14 12:38:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:45,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523539029] [2024-06-14 12:38:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:45,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:46,488 INFO 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 12:38:46,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:46,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523539029] [2024-06-14 12:38:46,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523539029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:46,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:46,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549080569] [2024-06-14 12:38:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:46,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:46,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:46,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:46,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:38:46,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:46,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:46,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:46,924 INFO L124 PetriNetUnfolderBase]: 1714/2562 cut-off events. [2024-06-14 12:38:46,925 INFO L125 PetriNetUnfolderBase]: For 10528/10532 co-relation queries the response was YES. [2024-06-14 12:38:46,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10004 conditions, 2562 events. 1714/2562 cut-off events. For 10528/10532 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11627 event pairs, 648 based on Foata normal form. 8/2569 useless extension candidates. Maximal degree in co-relation 9976. Up to 2464 conditions per place. [2024-06-14 12:38:46,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-14 12:38:46,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 676 flow [2024-06-14 12:38:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:38:46,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:38:46,943 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 404 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:38:46,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 676 flow [2024-06-14 12:38:46,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 658 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 12:38:46,951 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 458 flow [2024-06-14 12:38:46,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 12:38:46,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 12:38:46,953 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 458 flow [2024-06-14 12:38:46,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:38:46,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:46,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:38:46,954 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 12:38:46,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1789165315, now seen corresponding path program 2 times [2024-06-14 12:38:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576058005] [2024-06-14 12:38:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:47,469 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 12:38:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:47,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576058005] [2024-06-14 12:38:47,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576058005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:47,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:47,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:47,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448814363] [2024-06-14 12:38:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:47,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:47,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:47,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:47,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:38:47,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:47,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:47,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:47,957 INFO L124 PetriNetUnfolderBase]: 1699/2536 cut-off events. [2024-06-14 12:38:47,958 INFO L125 PetriNetUnfolderBase]: For 11815/11815 co-relation queries the response was YES. [2024-06-14 12:38:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10105 conditions, 2536 events. 1699/2536 cut-off events. For 11815/11815 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11446 event pairs, 644 based on Foata normal form. 2/2537 useless extension candidates. Maximal degree in co-relation 10074. Up to 2505 conditions per place. [2024-06-14 12:38:48,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-14 12:38:48,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 658 flow [2024-06-14 12:38:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:38:48,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:38:48,014 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 458 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:38:48,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 658 flow [2024-06-14 12:38:48,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 629 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:48,026 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 459 flow [2024-06-14 12:38:48,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-14 12:38:48,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-14 12:38:48,028 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 459 flow [2024-06-14 12:38:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:38:48,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:48,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:38:48,029 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 12:38:48,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash 170082911, now seen corresponding path program 1 times [2024-06-14 12:38:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:48,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298342488] [2024-06-14 12:38:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:48,663 INFO 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 12:38:48,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298342488] [2024-06-14 12:38:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298342488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:48,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:48,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:48,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645315165] [2024-06-14 12:38:48,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:48,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:48,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 12:38:48,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:48,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:48,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:49,210 INFO L124 PetriNetUnfolderBase]: 2147/3164 cut-off events. [2024-06-14 12:38:49,211 INFO L125 PetriNetUnfolderBase]: For 16980/16980 co-relation queries the response was YES. [2024-06-14 12:38:49,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12614 conditions, 3164 events. 2147/3164 cut-off events. For 16980/16980 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14624 event pairs, 595 based on Foata normal form. 20/3183 useless extension candidates. Maximal degree in co-relation 12582. Up to 2491 conditions per place. [2024-06-14 12:38:49,227 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 97 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-14 12:38:49,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 129 transitions, 1042 flow [2024-06-14 12:38:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:38:49,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-14 12:38:49,229 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 459 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:38:49,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 129 transitions, 1042 flow [2024-06-14 12:38:49,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 995 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:49,244 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 655 flow [2024-06-14 12:38:49,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-14 12:38:49,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 12:38:49,247 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 655 flow [2024-06-14 12:38:49,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 12:38:49,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:49,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:49,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:38:49,249 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 12:38:49,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 588776901, now seen corresponding path program 2 times [2024-06-14 12:38:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:49,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483232928] [2024-06-14 12:38:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:49,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483232928] [2024-06-14 12:38:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483232928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:49,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:49,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:49,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657558941] [2024-06-14 12:38:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:49,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:49,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:49,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 12:38:49,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:49,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:50,431 INFO L124 PetriNetUnfolderBase]: 2211/3254 cut-off events. [2024-06-14 12:38:50,432 INFO L125 PetriNetUnfolderBase]: For 22821/22821 co-relation queries the response was YES. [2024-06-14 12:38:50,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15335 conditions, 3254 events. 2211/3254 cut-off events. For 22821/22821 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14985 event pairs, 681 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 15299. Up to 3156 conditions per place. [2024-06-14 12:38:50,454 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 98 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-14 12:38:50,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 1084 flow [2024-06-14 12:38:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:38:50,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 12:38:50,461 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 655 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:38:50,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 1084 flow [2024-06-14 12:38:50,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1044 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-14 12:38:50,482 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 790 flow [2024-06-14 12:38:50,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-14 12:38:50,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-14 12:38:50,483 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 790 flow [2024-06-14 12:38:50,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 12:38:50,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:50,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:50,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:38:50,483 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 12:38:50,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1012438069, now seen corresponding path program 3 times [2024-06-14 12:38:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496320739] [2024-06-14 12:38:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:50,981 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 12:38:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496320739] [2024-06-14 12:38:50,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496320739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:50,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:50,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:50,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258312409] [2024-06-14 12:38:50,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:50,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:50,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:50,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:51,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:51,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 790 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 12:38:51,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:51,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:51,559 INFO L124 PetriNetUnfolderBase]: 2243/3300 cut-off events. [2024-06-14 12:38:51,559 INFO L125 PetriNetUnfolderBase]: For 26184/26184 co-relation queries the response was YES. [2024-06-14 12:38:51,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15994 conditions, 3300 events. 2243/3300 cut-off events. For 26184/26184 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15286 event pairs, 671 based on Foata normal form. 10/3309 useless extension candidates. Maximal degree in co-relation 15952. Up to 3078 conditions per place. [2024-06-14 12:38:51,580 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 104 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-14 12:38:51,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 134 transitions, 1274 flow [2024-06-14 12:38:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:38:51,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 12:38:51,582 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 790 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:38:51,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 134 transitions, 1274 flow [2024-06-14 12:38:51,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 1225 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:51,604 INFO L231 Difference]: Finished difference. Result has 88 places, 106 transitions, 910 flow [2024-06-14 12:38:51,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=88, PETRI_TRANSITIONS=106} [2024-06-14 12:38:51,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-14 12:38:51,605 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 106 transitions, 910 flow [2024-06-14 12:38:51,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 12:38:51,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:51,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:51,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:38:51,606 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:51,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash -709822081, now seen corresponding path program 1 times [2024-06-14 12:38:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:51,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073935597] [2024-06-14 12:38:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:52,468 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 12:38:52,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073935597] [2024-06-14 12:38:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073935597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:52,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:52,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:52,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150968507] [2024-06-14 12:38:52,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:52,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:52,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 106 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:52,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:52,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:52,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:53,235 INFO L124 PetriNetUnfolderBase]: 2306/3401 cut-off events. [2024-06-14 12:38:53,236 INFO L125 PetriNetUnfolderBase]: For 31509/31509 co-relation queries the response was YES. [2024-06-14 12:38:53,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16984 conditions, 3401 events. 2306/3401 cut-off events. For 31509/31509 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15851 event pairs, 665 based on Foata normal form. 18/3418 useless extension candidates. Maximal degree in co-relation 16940. Up to 3147 conditions per place. [2024-06-14 12:38:53,256 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-06-14 12:38:53,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 1364 flow [2024-06-14 12:38:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:38:53,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-14 12:38:53,258 INFO L175 Difference]: Start difference. First operand has 88 places, 106 transitions, 910 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:38:53,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 1364 flow [2024-06-14 12:38:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1311 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:53,283 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 945 flow [2024-06-14 12:38:53,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=945, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-14 12:38:53,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:38:53,284 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 945 flow [2024-06-14 12:38:53,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:53,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:53,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:53,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:38:53,285 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:53,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash 197337773, now seen corresponding path program 1 times [2024-06-14 12:38:53,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:53,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2761925] [2024-06-14 12:38:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:53,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:53,753 INFO 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 12:38:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2761925] [2024-06-14 12:38:53,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2761925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:53,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:53,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981338581] [2024-06-14 12:38:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:53,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:53,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 945 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 12:38:53,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:53,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:53,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:54,312 INFO L124 PetriNetUnfolderBase]: 2297/3389 cut-off events. [2024-06-14 12:38:54,313 INFO L125 PetriNetUnfolderBase]: For 33074/33074 co-relation queries the response was YES. [2024-06-14 12:38:54,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17269 conditions, 3389 events. 2297/3389 cut-off events. For 33074/33074 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15806 event pairs, 704 based on Foata normal form. 3/3391 useless extension candidates. Maximal degree in co-relation 17223. Up to 3367 conditions per place. [2024-06-14 12:38:54,337 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 104 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-06-14 12:38:54,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 1195 flow [2024-06-14 12:38:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-14 12:38:54,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:38:54,339 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 945 flow. Second operand 5 states and 85 transitions. [2024-06-14 12:38:54,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 1195 flow [2024-06-14 12:38:54,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 1113 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:54,364 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 891 flow [2024-06-14 12:38:54,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=891, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-14 12:38:54,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:38:54,365 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 891 flow [2024-06-14 12:38:54,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 12:38:54,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:54,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:54,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:38:54,365 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 12:38:54,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:54,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1566381682, now seen corresponding path program 1 times [2024-06-14 12:38:54,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:54,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678122678] [2024-06-14 12:38:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:54,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:55,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:55,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678122678] [2024-06-14 12:38:55,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678122678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:55,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:55,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:55,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721335623] [2024-06-14 12:38:55,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:55,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:55,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 891 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:55,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:55,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:55,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:55,537 INFO L124 PetriNetUnfolderBase]: 2308/3406 cut-off events. [2024-06-14 12:38:55,538 INFO L125 PetriNetUnfolderBase]: For 35394/35400 co-relation queries the response was YES. [2024-06-14 12:38:55,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17348 conditions, 3406 events. 2308/3406 cut-off events. For 35394/35400 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15912 event pairs, 696 based on Foata normal form. 8/3413 useless extension candidates. Maximal degree in co-relation 17301. Up to 3268 conditions per place. [2024-06-14 12:38:55,581 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-14 12:38:55,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 141 transitions, 1369 flow [2024-06-14 12:38:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:38:55,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:38:55,583 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 891 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:38:55,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 141 transitions, 1369 flow [2024-06-14 12:38:55,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1335 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:55,609 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 1003 flow [2024-06-14 12:38:55,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1003, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-14 12:38:55,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:38:55,610 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 1003 flow [2024-06-14 12:38:55,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:55,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:55,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:38:55,610 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 12:38:55,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1566385402, now seen corresponding path program 2 times [2024-06-14 12:38:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785297372] [2024-06-14 12:38:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:56,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785297372] [2024-06-14 12:38:56,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785297372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:56,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:56,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:56,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181717200] [2024-06-14 12:38:56,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:56,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:56,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:56,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:56,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 1003 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:56,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:56,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:56,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:56,920 INFO L124 PetriNetUnfolderBase]: 2303/3399 cut-off events. [2024-06-14 12:38:56,921 INFO L125 PetriNetUnfolderBase]: For 39822/39828 co-relation queries the response was YES. [2024-06-14 12:38:56,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17912 conditions, 3399 events. 2303/3399 cut-off events. For 39822/39828 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15873 event pairs, 701 based on Foata normal form. 8/3406 useless extension candidates. Maximal degree in co-relation 17865. Up to 3296 conditions per place. [2024-06-14 12:38:56,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 111 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-14 12:38:56,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1325 flow [2024-06-14 12:38:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:38:56,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:38:56,944 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 1003 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:38:56,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1325 flow [2024-06-14 12:38:56,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1244 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:56,978 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 974 flow [2024-06-14 12:38:56,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-14 12:38:56,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-14 12:38:56,979 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 974 flow [2024-06-14 12:38:56,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:56,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:56,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:56,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:38:56,980 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 12:38:56,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:56,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1570110207, now seen corresponding path program 1 times [2024-06-14 12:38:56,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:56,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686616926] [2024-06-14 12:38:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:57,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686616926] [2024-06-14 12:38:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686616926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:57,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:57,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326815995] [2024-06-14 12:38:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:57,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:57,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:57,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 974 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:57,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:57,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:57,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:58,122 INFO L124 PetriNetUnfolderBase]: 2447/3604 cut-off events. [2024-06-14 12:38:58,122 INFO L125 PetriNetUnfolderBase]: For 46612/46614 co-relation queries the response was YES. [2024-06-14 12:38:58,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19246 conditions, 3604 events. 2447/3604 cut-off events. For 46612/46614 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17044 event pairs, 593 based on Foata normal form. 12/3615 useless extension candidates. Maximal degree in co-relation 19197. Up to 2727 conditions per place. [2024-06-14 12:38:58,146 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 111 selfloop transitions, 47 changer transitions 0/161 dead transitions. [2024-06-14 12:38:58,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 1694 flow [2024-06-14 12:38:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:38:58,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-14 12:38:58,148 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 974 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:38:58,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 1694 flow [2024-06-14 12:38:58,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 161 transitions, 1639 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:58,184 INFO L231 Difference]: Finished difference. Result has 102 places, 123 transitions, 1189 flow [2024-06-14 12:38:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=123} [2024-06-14 12:38:58,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 12:38:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 123 transitions, 1189 flow [2024-06-14 12:38:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:38:58,186 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 12:38:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1570104627, now seen corresponding path program 2 times [2024-06-14 12:38:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48026077] [2024-06-14 12:38:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:58,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:58,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48026077] [2024-06-14 12:38:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48026077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:58,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:58,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:58,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529637422] [2024-06-14 12:38:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:58,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:58,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:58,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 123 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:59,318 INFO L124 PetriNetUnfolderBase]: 2431/3584 cut-off events. [2024-06-14 12:38:59,319 INFO L125 PetriNetUnfolderBase]: For 52847/52849 co-relation queries the response was YES. [2024-06-14 12:38:59,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20444 conditions, 3584 events. 2431/3584 cut-off events. For 52847/52849 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16953 event pairs, 647 based on Foata normal form. 12/3595 useless extension candidates. Maximal degree in co-relation 20392. Up to 2721 conditions per place. [2024-06-14 12:38:59,344 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 112 selfloop transitions, 50 changer transitions 0/165 dead transitions. [2024-06-14 12:38:59,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 1819 flow [2024-06-14 12:38:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 12:38:59,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 12:38:59,348 INFO L175 Difference]: Start difference. First operand has 102 places, 123 transitions, 1189 flow. Second operand 7 states and 147 transitions. [2024-06-14 12:38:59,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 1819 flow [2024-06-14 12:38:59,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1716 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:59,417 INFO L231 Difference]: Finished difference. Result has 108 places, 126 transitions, 1293 flow [2024-06-14 12:38:59,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1293, PETRI_PLACES=108, PETRI_TRANSITIONS=126} [2024-06-14 12:38:59,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-14 12:38:59,418 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 126 transitions, 1293 flow [2024-06-14 12:38:59,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:59,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:59,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:59,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:38:59,419 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:59,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1393555355, now seen corresponding path program 3 times [2024-06-14 12:38:59,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:59,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208164383] [2024-06-14 12:38:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:59,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:59,937 INFO 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 12:38:59,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208164383] [2024-06-14 12:38:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208164383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:59,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:59,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687900660] [2024-06-14 12:38:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:59,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:59,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 126 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:38:59,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:59,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:59,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:00,650 INFO L124 PetriNetUnfolderBase]: 2463/3629 cut-off events. [2024-06-14 12:39:00,650 INFO L125 PetriNetUnfolderBase]: For 58696/58702 co-relation queries the response was YES. [2024-06-14 12:39:00,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21511 conditions, 3629 events. 2463/3629 cut-off events. For 58696/58702 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17159 event pairs, 731 based on Foata normal form. 16/3644 useless extension candidates. Maximal degree in co-relation 21456. Up to 3464 conditions per place. [2024-06-14 12:39:00,671 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 130 selfloop transitions, 23 changer transitions 0/156 dead transitions. [2024-06-14 12:39:00,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 156 transitions, 1773 flow [2024-06-14 12:39:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:39:00,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-14 12:39:00,674 INFO L175 Difference]: Start difference. First operand has 108 places, 126 transitions, 1293 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:39:00,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 156 transitions, 1773 flow [2024-06-14 12:39:00,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 156 transitions, 1673 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:00,729 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 1324 flow [2024-06-14 12:39:00,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=110, PETRI_TRANSITIONS=130} [2024-06-14 12:39:00,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 12:39:00,730 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 1324 flow [2024-06-14 12:39:00,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 12:39:00,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:00,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:00,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:39:00,731 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 12:39:00,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1393288228, now seen corresponding path program 1 times [2024-06-14 12:39:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510758992] [2024-06-14 12:39:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:01,410 INFO 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 12:39:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510758992] [2024-06-14 12:39:01,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510758992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:01,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:01,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812374229] [2024-06-14 12:39:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:01,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:01,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:01,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 130 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:01,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:01,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:01,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:02,139 INFO L124 PetriNetUnfolderBase]: 2479/3651 cut-off events. [2024-06-14 12:39:02,139 INFO L125 PetriNetUnfolderBase]: For 61962/61962 co-relation queries the response was YES. [2024-06-14 12:39:02,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 3651 events. 2479/3651 cut-off events. For 61962/61962 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17265 event pairs, 709 based on Foata normal form. 5/3655 useless extension candidates. Maximal degree in co-relation 21312. Up to 3514 conditions per place. [2024-06-14 12:39:02,167 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 130 selfloop transitions, 30 changer transitions 0/163 dead transitions. [2024-06-14 12:39:02,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 1836 flow [2024-06-14 12:39:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:39:02,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-14 12:39:02,168 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 1324 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:39:02,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 1836 flow [2024-06-14 12:39:02,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 163 transitions, 1763 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:02,232 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1460 flow [2024-06-14 12:39:02,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1460, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-14 12:39:02,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 12:39:02,233 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1460 flow [2024-06-14 12:39:02,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:02,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:02,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:02,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:39:02,233 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 12:39:02,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1310451450, now seen corresponding path program 1 times [2024-06-14 12:39:02,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:02,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127438506] [2024-06-14 12:39:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:02,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:03,132 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 12:39:03,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127438506] [2024-06-14 12:39:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127438506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:03,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:03,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48222977] [2024-06-14 12:39:03,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:03,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:03,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:03,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:03,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:03,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:03,827 INFO L124 PetriNetUnfolderBase]: 2496/3679 cut-off events. [2024-06-14 12:39:03,827 INFO L125 PetriNetUnfolderBase]: For 68153/68159 co-relation queries the response was YES. [2024-06-14 12:39:03,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 3679 events. 2496/3679 cut-off events. For 68153/68159 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17467 event pairs, 576 based on Foata normal form. 10/3688 useless extension candidates. Maximal degree in co-relation 22593. Up to 3443 conditions per place. [2024-06-14 12:39:03,852 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 32 changer transitions 0/177 dead transitions. [2024-06-14 12:39:03,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 177 transitions, 2064 flow [2024-06-14 12:39:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:39:03,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:39:03,854 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1460 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:39:03,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 177 transitions, 2064 flow [2024-06-14 12:39:03,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1999 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:03,926 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 1566 flow [2024-06-14 12:39:03,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2024-06-14 12:39:03,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-14 12:39:03,927 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 1566 flow [2024-06-14 12:39:03,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:03,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:03,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:03,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:39:03,928 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 12:39:03,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1310512024, now seen corresponding path program 1 times [2024-06-14 12:39:03,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:03,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048328688] [2024-06-14 12:39:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:03,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:04,657 INFO 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 12:39:04,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048328688] [2024-06-14 12:39:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048328688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:04,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:04,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:04,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861456798] [2024-06-14 12:39:04,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:04,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:04,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:04,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:04,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:04,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:04,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:04,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:05,542 INFO L124 PetriNetUnfolderBase]: 2720/3993 cut-off events. [2024-06-14 12:39:05,542 INFO L125 PetriNetUnfolderBase]: For 81314/81316 co-relation queries the response was YES. [2024-06-14 12:39:05,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24786 conditions, 3993 events. 2720/3993 cut-off events. For 81314/81316 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19269 event pairs, 571 based on Foata normal form. 12/4004 useless extension candidates. Maximal degree in co-relation 24727. Up to 2700 conditions per place. [2024-06-14 12:39:05,569 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 146 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-14 12:39:05,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 219 transitions, 2624 flow [2024-06-14 12:39:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:39:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:39:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 12:39:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 12:39:05,571 INFO L175 Difference]: Start difference. First operand has 119 places, 144 transitions, 1566 flow. Second operand 10 states and 210 transitions. [2024-06-14 12:39:05,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 219 transitions, 2624 flow [2024-06-14 12:39:05,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 219 transitions, 2534 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:05,667 INFO L231 Difference]: Finished difference. Result has 127 places, 159 transitions, 1831 flow [2024-06-14 12:39:05,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1831, PETRI_PLACES=127, PETRI_TRANSITIONS=159} [2024-06-14 12:39:05,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 12:39:05,668 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 159 transitions, 1831 flow [2024-06-14 12:39:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:05,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:05,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:05,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:39:05,668 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:05,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash -547519622, now seen corresponding path program 2 times [2024-06-14 12:39:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543288048] [2024-06-14 12:39:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:06,400 INFO 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 12:39:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:06,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543288048] [2024-06-14 12:39:06,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543288048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:06,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:06,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618958499] [2024-06-14 12:39:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:06,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:06,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:06,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:06,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 159 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:06,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:06,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:06,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:07,173 INFO L124 PetriNetUnfolderBase]: 2712/3980 cut-off events. [2024-06-14 12:39:07,174 INFO L125 PetriNetUnfolderBase]: For 90010/90016 co-relation queries the response was YES. [2024-06-14 12:39:07,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26777 conditions, 3980 events. 2712/3980 cut-off events. For 90010/90016 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19061 event pairs, 748 based on Foata normal form. 10/3989 useless extension candidates. Maximal degree in co-relation 26714. Up to 3821 conditions per place. [2024-06-14 12:39:07,204 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 31 changer transitions 0/193 dead transitions. [2024-06-14 12:39:07,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 193 transitions, 2297 flow [2024-06-14 12:39:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:39:07,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:39:07,205 INFO L175 Difference]: Start difference. First operand has 127 places, 159 transitions, 1831 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:39:07,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 193 transitions, 2297 flow [2024-06-14 12:39:07,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 193 transitions, 2120 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:07,316 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1724 flow [2024-06-14 12:39:07,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-14 12:39:07,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 12:39:07,317 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1724 flow [2024-06-14 12:39:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:07,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:07,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:07,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:39:07,317 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 12:39:07,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1428599704, now seen corresponding path program 2 times [2024-06-14 12:39:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:07,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100102301] [2024-06-14 12:39:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:08,025 INFO 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 12:39:08,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100102301] [2024-06-14 12:39:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100102301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:08,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:08,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384480129] [2024-06-14 12:39:08,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:08,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:08,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:08,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:08,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1724 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:08,875 INFO L124 PetriNetUnfolderBase]: 2776/4073 cut-off events. [2024-06-14 12:39:08,875 INFO L125 PetriNetUnfolderBase]: For 95402/95404 co-relation queries the response was YES. [2024-06-14 12:39:08,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27086 conditions, 4073 events. 2776/4073 cut-off events. For 95402/95404 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19723 event pairs, 578 based on Foata normal form. 12/4084 useless extension candidates. Maximal degree in co-relation 27021. Up to 2921 conditions per place. [2024-06-14 12:39:08,909 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 150 selfloop transitions, 67 changer transitions 0/220 dead transitions. [2024-06-14 12:39:08,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 220 transitions, 2682 flow [2024-06-14 12:39:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 12:39:08,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-14 12:39:08,910 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1724 flow. Second operand 9 states and 191 transitions. [2024-06-14 12:39:08,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 220 transitions, 2682 flow [2024-06-14 12:39:09,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 220 transitions, 2612 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:39:09,017 INFO L231 Difference]: Finished difference. Result has 133 places, 165 transitions, 1904 flow [2024-06-14 12:39:09,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1904, PETRI_PLACES=133, PETRI_TRANSITIONS=165} [2024-06-14 12:39:09,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 12:39:09,018 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 165 transitions, 1904 flow [2024-06-14 12:39:09,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:09,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:09,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:09,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:39:09,018 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 12:39:09,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1428784278, now seen corresponding path program 1 times [2024-06-14 12:39:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070562507] [2024-06-14 12:39:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:09,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:09,887 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 12:39:09,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070562507] [2024-06-14 12:39:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070562507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:09,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:09,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559917565] [2024-06-14 12:39:09,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:09,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:09,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 165 transitions, 1904 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:09,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:09,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:09,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:10,839 INFO L124 PetriNetUnfolderBase]: 3120/4587 cut-off events. [2024-06-14 12:39:10,840 INFO L125 PetriNetUnfolderBase]: For 125055/125057 co-relation queries the response was YES. [2024-06-14 12:39:10,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31310 conditions, 4587 events. 3120/4587 cut-off events. For 125055/125057 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22735 event pairs, 621 based on Foata normal form. 46/4632 useless extension candidates. Maximal degree in co-relation 31243. Up to 3248 conditions per place. [2024-06-14 12:39:10,878 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 165 selfloop transitions, 66 changer transitions 0/234 dead transitions. [2024-06-14 12:39:10,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 234 transitions, 2983 flow [2024-06-14 12:39:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 12:39:10,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 12:39:10,879 INFO L175 Difference]: Start difference. First operand has 133 places, 165 transitions, 1904 flow. Second operand 8 states and 168 transitions. [2024-06-14 12:39:10,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 234 transitions, 2983 flow [2024-06-14 12:39:11,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 234 transitions, 2805 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:11,011 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 2247 flow [2024-06-14 12:39:11,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2247, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-14 12:39:11,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 12:39:11,012 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 2247 flow [2024-06-14 12:39:11,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:11,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:11,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:11,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:39:11,012 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 12:39:11,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1428777334, now seen corresponding path program 3 times [2024-06-14 12:39:11,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:11,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278949892] [2024-06-14 12:39:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:11,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:11,857 INFO 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 12:39:11,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:11,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278949892] [2024-06-14 12:39:11,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278949892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:11,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:11,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:11,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277468510] [2024-06-14 12:39:11,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:11,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:11,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:11,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:11,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 2247 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:12,754 INFO L124 PetriNetUnfolderBase]: 3156/4639 cut-off events. [2024-06-14 12:39:12,755 INFO L125 PetriNetUnfolderBase]: For 133480/133482 co-relation queries the response was YES. [2024-06-14 12:39:12,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34286 conditions, 4639 events. 3156/4639 cut-off events. For 133480/133482 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22868 event pairs, 588 based on Foata normal form. 8/4646 useless extension candidates. Maximal degree in co-relation 34214. Up to 4155 conditions per place. [2024-06-14 12:39:12,800 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 201 selfloop transitions, 48 changer transitions 0/252 dead transitions. [2024-06-14 12:39:12,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 252 transitions, 3470 flow [2024-06-14 12:39:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:39:12,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:39:12,802 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 2247 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:39:12,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 252 transitions, 3470 flow [2024-06-14 12:39:12,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 252 transitions, 3386 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-14 12:39:12,997 INFO L231 Difference]: Finished difference. Result has 148 places, 214 transitions, 2782 flow [2024-06-14 12:39:12,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2782, PETRI_PLACES=148, PETRI_TRANSITIONS=214} [2024-06-14 12:39:12,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-14 12:39:12,998 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 214 transitions, 2782 flow [2024-06-14 12:39:12,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:12,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:12,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:39:12,999 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 12:39:12,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2082634254, now seen corresponding path program 1 times [2024-06-14 12:39:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847466985] [2024-06-14 12:39:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:13,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:13,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847466985] [2024-06-14 12:39:13,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847466985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:13,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:13,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:13,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176661086] [2024-06-14 12:39:13,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:13,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:13,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 214 transitions, 2782 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:13,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:13,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:13,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:14,196 INFO L124 PetriNetUnfolderBase]: 3171/4658 cut-off events. [2024-06-14 12:39:14,196 INFO L125 PetriNetUnfolderBase]: For 141882/141882 co-relation queries the response was YES. [2024-06-14 12:39:14,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35218 conditions, 4658 events. 3171/4658 cut-off events. For 141882/141882 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22922 event pairs, 801 based on Foata normal form. 3/4660 useless extension candidates. Maximal degree in co-relation 35140. Up to 4604 conditions per place. [2024-06-14 12:39:14,237 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 16 changer transitions 0/237 dead transitions. [2024-06-14 12:39:14,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 237 transitions, 3443 flow [2024-06-14 12:39:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:39:14,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:39:14,238 INFO L175 Difference]: Start difference. First operand has 148 places, 214 transitions, 2782 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:39:14,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 237 transitions, 3443 flow [2024-06-14 12:39:14,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 237 transitions, 3342 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:14,421 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2792 flow [2024-06-14 12:39:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2792, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-06-14 12:39:14,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 12:39:14,421 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2792 flow [2024-06-14 12:39:14,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:14,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:14,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:39:14,422 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:14,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash 524342784, now seen corresponding path program 2 times [2024-06-14 12:39:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:14,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233785718] [2024-06-14 12:39:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:15,243 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 12:39:15,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:15,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233785718] [2024-06-14 12:39:15,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233785718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:15,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:15,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722910258] [2024-06-14 12:39:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:15,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:15,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2792 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:15,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:15,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:15,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:16,245 INFO L124 PetriNetUnfolderBase]: 3287/4838 cut-off events. [2024-06-14 12:39:16,245 INFO L125 PetriNetUnfolderBase]: For 157041/157041 co-relation queries the response was YES. [2024-06-14 12:39:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36236 conditions, 4838 events. 3287/4838 cut-off events. For 157041/157041 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24016 event pairs, 760 based on Foata normal form. 22/4859 useless extension candidates. Maximal degree in co-relation 36156. Up to 4422 conditions per place. [2024-06-14 12:39:16,291 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 219 selfloop transitions, 45 changer transitions 0/267 dead transitions. [2024-06-14 12:39:16,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 267 transitions, 3778 flow [2024-06-14 12:39:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:39:16,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-14 12:39:16,293 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2792 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:39:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 267 transitions, 3778 flow [2024-06-14 12:39:16,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 267 transitions, 3597 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:16,471 INFO L231 Difference]: Finished difference. Result has 157 places, 228 transitions, 2949 flow [2024-06-14 12:39:16,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2949, PETRI_PLACES=157, PETRI_TRANSITIONS=228} [2024-06-14 12:39:16,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-14 12:39:16,472 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 228 transitions, 2949 flow [2024-06-14 12:39:16,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:16,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:16,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:16,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:39:16,473 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:16,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash 760517896, now seen corresponding path program 1 times [2024-06-14 12:39:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:16,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472950369] [2024-06-14 12:39:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472950369] [2024-06-14 12:39:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472950369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:17,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:17,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721333686] [2024-06-14 12:39:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:17,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:17,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:17,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 228 transitions, 2949 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:17,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:17,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:17,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:18,261 INFO L124 PetriNetUnfolderBase]: 3303/4862 cut-off events. [2024-06-14 12:39:18,261 INFO L125 PetriNetUnfolderBase]: For 163953/163959 co-relation queries the response was YES. [2024-06-14 12:39:18,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37249 conditions, 4862 events. 3303/4862 cut-off events. For 163953/163959 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24222 event pairs, 783 based on Foata normal form. 11/4872 useless extension candidates. Maximal degree in co-relation 37166. Up to 4629 conditions per place. [2024-06-14 12:39:18,301 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-14 12:39:18,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 260 transitions, 3721 flow [2024-06-14 12:39:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:39:18,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 12:39:18,302 INFO L175 Difference]: Start difference. First operand has 157 places, 228 transitions, 2949 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:39:18,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 260 transitions, 3721 flow [2024-06-14 12:39:18,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3625 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:18,554 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 3033 flow [2024-06-14 12:39:18,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-14 12:39:18,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 12:39:18,556 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 3033 flow [2024-06-14 12:39:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:18,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:39:18,557 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 12:39:18,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash -242260718, now seen corresponding path program 3 times [2024-06-14 12:39:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:18,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551751251] [2024-06-14 12:39:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:19,436 INFO 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 12:39:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:19,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551751251] [2024-06-14 12:39:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551751251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:19,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:19,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:19,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457812776] [2024-06-14 12:39:19,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:19,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:19,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:19,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:19,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:19,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:19,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:20,618 INFO L124 PetriNetUnfolderBase]: 3391/5001 cut-off events. [2024-06-14 12:39:20,618 INFO L125 PetriNetUnfolderBase]: For 179434/179434 co-relation queries the response was YES. [2024-06-14 12:39:20,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 5001 events. 3391/5001 cut-off events. For 179434/179434 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25029 event pairs, 804 based on Foata normal form. 18/5018 useless extension candidates. Maximal degree in co-relation 38592. Up to 4743 conditions per place. [2024-06-14 12:39:20,669 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 33 changer transitions 0/269 dead transitions. [2024-06-14 12:39:20,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3848 flow [2024-06-14 12:39:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:39:20,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 12:39:20,670 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 3033 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:39:20,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3848 flow [2024-06-14 12:39:20,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 269 transitions, 3732 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:20,924 INFO L231 Difference]: Finished difference. Result has 165 places, 234 transitions, 3064 flow [2024-06-14 12:39:20,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3064, PETRI_PLACES=165, PETRI_TRANSITIONS=234} [2024-06-14 12:39:20,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 12:39:20,925 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 234 transitions, 3064 flow [2024-06-14 12:39:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:20,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:20,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:20,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:39:20,926 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 12:39:20,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 752236990, now seen corresponding path program 4 times [2024-06-14 12:39:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:20,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608645881] [2024-06-14 12:39:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:21,517 INFO 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 12:39:21,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:21,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608645881] [2024-06-14 12:39:21,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608645881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:21,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:21,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:21,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835793480] [2024-06-14 12:39:21,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:21,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:21,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:21,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 234 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:21,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:21,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:22,466 INFO L124 PetriNetUnfolderBase]: 3397/5011 cut-off events. [2024-06-14 12:39:22,467 INFO L125 PetriNetUnfolderBase]: For 183951/183957 co-relation queries the response was YES. [2024-06-14 12:39:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38920 conditions, 5011 events. 3397/5011 cut-off events. For 183951/183957 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25203 event pairs, 806 based on Foata normal form. 15/5025 useless extension candidates. Maximal degree in co-relation 38834. Up to 4809 conditions per place. [2024-06-14 12:39:22,513 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 43 changer transitions 0/277 dead transitions. [2024-06-14 12:39:22,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 277 transitions, 3984 flow [2024-06-14 12:39:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:39:22,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:39:22,515 INFO L175 Difference]: Start difference. First operand has 165 places, 234 transitions, 3064 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:39:22,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 277 transitions, 3984 flow [2024-06-14 12:39:22,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 277 transitions, 3868 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:22,772 INFO L231 Difference]: Finished difference. Result has 169 places, 250 transitions, 3323 flow [2024-06-14 12:39:22,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3323, PETRI_PLACES=169, PETRI_TRANSITIONS=250} [2024-06-14 12:39:22,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 12:39:22,773 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 250 transitions, 3323 flow [2024-06-14 12:39:22,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 12:39:22,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:22,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:39:22,773 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 12:39:22,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -241964048, now seen corresponding path program 4 times [2024-06-14 12:39:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:22,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209356036] [2024-06-14 12:39:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:23,448 INFO 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 12:39:23,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:23,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209356036] [2024-06-14 12:39:23,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209356036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:23,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:23,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:23,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067150414] [2024-06-14 12:39:23,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:23,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:23,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:23,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 250 transitions, 3323 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:23,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:23,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:23,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:24,511 INFO L124 PetriNetUnfolderBase]: 3438/5077 cut-off events. [2024-06-14 12:39:24,512 INFO L125 PetriNetUnfolderBase]: For 194546/194546 co-relation queries the response was YES. [2024-06-14 12:39:24,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39784 conditions, 5077 events. 3438/5077 cut-off events. For 194546/194546 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25505 event pairs, 787 based on Foata normal form. 14/5090 useless extension candidates. Maximal degree in co-relation 39695. Up to 4905 conditions per place. [2024-06-14 12:39:24,563 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 27 changer transitions 0/284 dead transitions. [2024-06-14 12:39:24,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 284 transitions, 4149 flow [2024-06-14 12:39:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:39:24,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:39:24,565 INFO L175 Difference]: Start difference. First operand has 169 places, 250 transitions, 3323 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:39:24,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 284 transitions, 4149 flow [2024-06-14 12:39:24,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 284 transitions, 4014 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:24,864 INFO L231 Difference]: Finished difference. Result has 175 places, 254 transitions, 3357 flow [2024-06-14 12:39:24,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3357, PETRI_PLACES=175, PETRI_TRANSITIONS=254} [2024-06-14 12:39:24,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 12:39:24,865 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 254 transitions, 3357 flow [2024-06-14 12:39:24,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:24,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:24,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:24,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:39:24,866 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:24,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 663071500, now seen corresponding path program 2 times [2024-06-14 12:39:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:24,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86846180] [2024-06-14 12:39:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:25,319 INFO 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 12:39:25,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86846180] [2024-06-14 12:39:25,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86846180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:25,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:25,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:25,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092619800] [2024-06-14 12:39:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:25,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:25,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:25,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:25,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 254 transitions, 3357 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:25,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:25,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:25,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:26,183 INFO L124 PetriNetUnfolderBase]: 3429/5065 cut-off events. [2024-06-14 12:39:26,183 INFO L125 PetriNetUnfolderBase]: For 196810/196810 co-relation queries the response was YES. [2024-06-14 12:39:26,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39998 conditions, 5065 events. 3429/5065 cut-off events. For 196810/196810 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25418 event pairs, 825 based on Foata normal form. 3/5067 useless extension candidates. Maximal degree in co-relation 39906. Up to 5040 conditions per place. [2024-06-14 12:39:26,232 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 251 selfloop transitions, 11 changer transitions 0/265 dead transitions. [2024-06-14 12:39:26,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 265 transitions, 3918 flow [2024-06-14 12:39:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:39:26,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 12:39:26,234 INFO L175 Difference]: Start difference. First operand has 175 places, 254 transitions, 3357 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:39:26,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 265 transitions, 3918 flow [2024-06-14 12:39:26,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 265 transitions, 3779 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:26,527 INFO L231 Difference]: Finished difference. Result has 176 places, 254 transitions, 3246 flow [2024-06-14 12:39:26,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3246, PETRI_PLACES=176, PETRI_TRANSITIONS=254} [2024-06-14 12:39:26,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 12:39:26,527 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 254 transitions, 3246 flow [2024-06-14 12:39:26,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:26,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:26,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:26,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:39:26,528 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:26,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 325632748, now seen corresponding path program 1 times [2024-06-14 12:39:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:26,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818830449] [2024-06-14 12:39:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:26,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:26,941 INFO 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 12:39:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818830449] [2024-06-14 12:39:26,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818830449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:26,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:26,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:26,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657181473] [2024-06-14 12:39:26,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:26,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:26,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:26,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 254 transitions, 3246 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:27,907 INFO L124 PetriNetUnfolderBase]: 3426/5062 cut-off events. [2024-06-14 12:39:27,907 INFO L125 PetriNetUnfolderBase]: For 200133/200133 co-relation queries the response was YES. [2024-06-14 12:39:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39471 conditions, 5062 events. 3426/5062 cut-off events. For 200133/200133 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25488 event pairs, 817 based on Foata normal form. 9/5070 useless extension candidates. Maximal degree in co-relation 39378. Up to 4920 conditions per place. [2024-06-14 12:39:27,954 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 35 changer transitions 0/280 dead transitions. [2024-06-14 12:39:27,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 280 transitions, 4049 flow [2024-06-14 12:39:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:39:27,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:39:27,955 INFO L175 Difference]: Start difference. First operand has 176 places, 254 transitions, 3246 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:39:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 280 transitions, 4049 flow [2024-06-14 12:39:28,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 280 transitions, 4015 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:28,192 INFO L231 Difference]: Finished difference. Result has 177 places, 260 transitions, 3401 flow [2024-06-14 12:39:28,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3401, PETRI_PLACES=177, PETRI_TRANSITIONS=260} [2024-06-14 12:39:28,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 12:39:28,192 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 260 transitions, 3401 flow [2024-06-14 12:39:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:28,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:28,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:28,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:39:28,193 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:28,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash 663279262, now seen corresponding path program 2 times [2024-06-14 12:39:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017580576] [2024-06-14 12:39:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:28,647 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 12:39:28,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:28,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017580576] [2024-06-14 12:39:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017580576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:28,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:28,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:28,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218586363] [2024-06-14 12:39:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:28,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:28,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:28,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:28,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 260 transitions, 3401 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:28,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:28,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:28,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:29,647 INFO L124 PetriNetUnfolderBase]: 3312/4882 cut-off events. [2024-06-14 12:39:29,647 INFO L125 PetriNetUnfolderBase]: For 202077/202079 co-relation queries the response was YES. [2024-06-14 12:39:29,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38569 conditions, 4882 events. 3312/4882 cut-off events. For 202077/202079 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24269 event pairs, 811 based on Foata normal form. 3/4884 useless extension candidates. Maximal degree in co-relation 38476. Up to 4753 conditions per place. [2024-06-14 12:39:29,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 37 changer transitions 0/277 dead transitions. [2024-06-14 12:39:29,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 277 transitions, 4023 flow [2024-06-14 12:39:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:39:29,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:39:29,690 INFO L175 Difference]: Start difference. First operand has 177 places, 260 transitions, 3401 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:39:29,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 277 transitions, 4023 flow [2024-06-14 12:39:29,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 277 transitions, 3944 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:29,939 INFO L231 Difference]: Finished difference. Result has 180 places, 260 transitions, 3407 flow [2024-06-14 12:39:29,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3407, PETRI_PLACES=180, PETRI_TRANSITIONS=260} [2024-06-14 12:39:29,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 12:39:29,939 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 260 transitions, 3407 flow [2024-06-14 12:39:29,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:39:29,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:29,940 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 12:39:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:39:29,940 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 12:39:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash 204888280, now seen corresponding path program 1 times [2024-06-14 12:39:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277354306] [2024-06-14 12:39:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:30,652 INFO 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 12:39:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:30,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277354306] [2024-06-14 12:39:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277354306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:30,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997158439] [2024-06-14 12:39:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:30,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 260 transitions, 3407 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:30,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:30,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:31,833 INFO L124 PetriNetUnfolderBase]: 3561/5285 cut-off events. [2024-06-14 12:39:31,834 INFO L125 PetriNetUnfolderBase]: For 245803/245805 co-relation queries the response was YES. [2024-06-14 12:39:31,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42481 conditions, 5285 events. 3561/5285 cut-off events. For 245803/245805 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27110 event pairs, 518 based on Foata normal form. 24/5308 useless extension candidates. Maximal degree in co-relation 42387. Up to 3760 conditions per place. [2024-06-14 12:39:31,881 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 82 changer transitions 0/346 dead transitions. [2024-06-14 12:39:31,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 346 transitions, 5199 flow [2024-06-14 12:39:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 12:39:31,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-14 12:39:31,882 INFO L175 Difference]: Start difference. First operand has 180 places, 260 transitions, 3407 flow. Second operand 9 states and 184 transitions. [2024-06-14 12:39:31,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 346 transitions, 5199 flow [2024-06-14 12:39:32,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 346 transitions, 5070 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:32,215 INFO L231 Difference]: Finished difference. Result has 186 places, 280 transitions, 3901 flow [2024-06-14 12:39:32,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3901, PETRI_PLACES=186, PETRI_TRANSITIONS=280} [2024-06-14 12:39:32,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 12:39:32,216 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 280 transitions, 3901 flow [2024-06-14 12:39:32,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:32,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:32,216 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 12:39:32,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:39:32,216 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 12:39:32,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash 206765950, now seen corresponding path program 2 times [2024-06-14 12:39:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:32,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774253857] [2024-06-14 12:39:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:32,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774253857] [2024-06-14 12:39:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774253857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:32,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:32,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:32,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125249225] [2024-06-14 12:39:32,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:32,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:32,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:33,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:33,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 280 transitions, 3901 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:33,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:33,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:33,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:34,517 INFO L124 PetriNetUnfolderBase]: 4125/6199 cut-off events. [2024-06-14 12:39:34,517 INFO L125 PetriNetUnfolderBase]: For 342751/342753 co-relation queries the response was YES. [2024-06-14 12:39:34,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50340 conditions, 6199 events. 4125/6199 cut-off events. For 342751/342753 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33474 event pairs, 832 based on Foata normal form. 98/6296 useless extension candidates. Maximal degree in co-relation 50242. Up to 3597 conditions per place. [2024-06-14 12:39:34,595 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 222 selfloop transitions, 143 changer transitions 0/368 dead transitions. [2024-06-14 12:39:34,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 368 transitions, 5569 flow [2024-06-14 12:39:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:39:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:39:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-14 12:39:34,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-14 12:39:34,597 INFO L175 Difference]: Start difference. First operand has 186 places, 280 transitions, 3901 flow. Second operand 11 states and 234 transitions. [2024-06-14 12:39:34,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 368 transitions, 5569 flow [2024-06-14 12:39:35,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 368 transitions, 5399 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:35,135 INFO L231 Difference]: Finished difference. Result has 198 places, 296 transitions, 4441 flow [2024-06-14 12:39:35,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4441, PETRI_PLACES=198, PETRI_TRANSITIONS=296} [2024-06-14 12:39:35,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 12:39:35,136 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 296 transitions, 4441 flow [2024-06-14 12:39:35,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:35,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:35,136 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 12:39:35,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:39:35,137 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 12:39:35,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash 206762230, now seen corresponding path program 3 times [2024-06-14 12:39:35,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:35,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202314318] [2024-06-14 12:39:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:35,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:35,917 INFO 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 12:39:35,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:35,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202314318] [2024-06-14 12:39:35,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202314318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:35,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:35,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901768949] [2024-06-14 12:39:35,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:36,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:36,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 296 transitions, 4441 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:36,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:36,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:36,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:37,546 INFO L124 PetriNetUnfolderBase]: 5055/7673 cut-off events. [2024-06-14 12:39:37,547 INFO L125 PetriNetUnfolderBase]: For 454121/454123 co-relation queries the response was YES. [2024-06-14 12:39:37,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64897 conditions, 7673 events. 5055/7673 cut-off events. For 454121/454123 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43900 event pairs, 1051 based on Foata normal form. 82/7754 useless extension candidates. Maximal degree in co-relation 64794. Up to 3586 conditions per place. [2024-06-14 12:39:37,640 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 238 selfloop transitions, 139 changer transitions 0/380 dead transitions. [2024-06-14 12:39:37,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 380 transitions, 6213 flow [2024-06-14 12:39:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:39:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:39:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-14 12:39:37,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 12:39:37,644 INFO L175 Difference]: Start difference. First operand has 198 places, 296 transitions, 4441 flow. Second operand 10 states and 220 transitions. [2024-06-14 12:39:37,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 380 transitions, 6213 flow [2024-06-14 12:39:38,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 380 transitions, 5956 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:38,610 INFO L231 Difference]: Finished difference. Result has 204 places, 303 transitions, 4696 flow [2024-06-14 12:39:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4696, PETRI_PLACES=204, PETRI_TRANSITIONS=303} [2024-06-14 12:39:38,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 12:39:38,611 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 303 transitions, 4696 flow [2024-06-14 12:39:38,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:38,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:38,612 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 12:39:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:39:38,612 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 12:39:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash 57473710, now seen corresponding path program 1 times [2024-06-14 12:39:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612490235] [2024-06-14 12:39:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:38,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:39,242 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 12:39:39,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:39,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612490235] [2024-06-14 12:39:39,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612490235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:39,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:39,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:39,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201545767] [2024-06-14 12:39:39,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:39,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:39,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:39,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:39,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 303 transitions, 4696 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:39,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:39,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:39,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:40,665 INFO L124 PetriNetUnfolderBase]: 5115/7757 cut-off events. [2024-06-14 12:39:40,665 INFO L125 PetriNetUnfolderBase]: For 424510/424512 co-relation queries the response was YES. [2024-06-14 12:39:40,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66637 conditions, 7757 events. 5115/7757 cut-off events. For 424510/424512 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44519 event pairs, 1437 based on Foata normal form. 14/7770 useless extension candidates. Maximal degree in co-relation 66531. Up to 6842 conditions per place. [2024-06-14 12:39:40,768 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 258 selfloop transitions, 83 changer transitions 0/344 dead transitions. [2024-06-14 12:39:40,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 344 transitions, 5844 flow [2024-06-14 12:39:40,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 12:39:40,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-14 12:39:40,770 INFO L175 Difference]: Start difference. First operand has 204 places, 303 transitions, 4696 flow. Second operand 7 states and 142 transitions. [2024-06-14 12:39:40,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 344 transitions, 5844 flow [2024-06-14 12:39:41,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 344 transitions, 5562 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:41,671 INFO L231 Difference]: Finished difference. Result has 205 places, 311 transitions, 4772 flow [2024-06-14 12:39:41,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4772, PETRI_PLACES=205, PETRI_TRANSITIONS=311} [2024-06-14 12:39:41,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 12:39:41,672 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 311 transitions, 4772 flow [2024-06-14 12:39:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:41,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:41,673 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 12:39:41,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:39:41,673 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:41,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1336915348, now seen corresponding path program 4 times [2024-06-14 12:39:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:41,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714020429] [2024-06-14 12:39:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:42,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:42,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714020429] [2024-06-14 12:39:42,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714020429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:42,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:42,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:42,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056161192] [2024-06-14 12:39:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:42,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:42,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 311 transitions, 4772 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:42,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:42,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:42,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:44,240 INFO L124 PetriNetUnfolderBase]: 5211/7917 cut-off events. [2024-06-14 12:39:44,241 INFO L125 PetriNetUnfolderBase]: For 439863/439865 co-relation queries the response was YES. [2024-06-14 12:39:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67116 conditions, 7917 events. 5211/7917 cut-off events. For 439863/439865 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 45684 event pairs, 1411 based on Foata normal form. 24/7940 useless extension candidates. Maximal degree in co-relation 67008. Up to 6643 conditions per place. [2024-06-14 12:39:44,324 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 284 selfloop transitions, 96 changer transitions 0/383 dead transitions. [2024-06-14 12:39:44,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 383 transitions, 6541 flow [2024-06-14 12:39:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 12:39:44,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-14 12:39:44,326 INFO L175 Difference]: Start difference. First operand has 205 places, 311 transitions, 4772 flow. Second operand 9 states and 187 transitions. [2024-06-14 12:39:44,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 383 transitions, 6541 flow [2024-06-14 12:39:45,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 383 transitions, 6367 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:45,153 INFO L231 Difference]: Finished difference. Result has 214 places, 326 transitions, 5247 flow [2024-06-14 12:39:45,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5247, PETRI_PLACES=214, PETRI_TRANSITIONS=326} [2024-06-14 12:39:45,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 12:39:45,158 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 326 transitions, 5247 flow [2024-06-14 12:39:45,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:45,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:45,159 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 12:39:45,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:39:45,159 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:45,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1336919068, now seen corresponding path program 5 times [2024-06-14 12:39:45,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:45,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114293797] [2024-06-14 12:39:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114293797] [2024-06-14 12:39:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114293797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:45,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:45,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488107668] [2024-06-14 12:39:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:45,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:45,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:45,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 326 transitions, 5247 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:45,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:45,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:45,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:47,609 INFO L124 PetriNetUnfolderBase]: 5371/8173 cut-off events. [2024-06-14 12:39:47,609 INFO L125 PetriNetUnfolderBase]: For 476965/476967 co-relation queries the response was YES. [2024-06-14 12:39:47,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70608 conditions, 8173 events. 5371/8173 cut-off events. For 476965/476967 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 47772 event pairs, 1592 based on Foata normal form. 30/8202 useless extension candidates. Maximal degree in co-relation 70495. Up to 7265 conditions per place. [2024-06-14 12:39:47,703 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 283 selfloop transitions, 97 changer transitions 0/383 dead transitions. [2024-06-14 12:39:47,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 383 transitions, 6611 flow [2024-06-14 12:39:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 12:39:47,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-14 12:39:47,705 INFO L175 Difference]: Start difference. First operand has 214 places, 326 transitions, 5247 flow. Second operand 9 states and 182 transitions. [2024-06-14 12:39:47,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 383 transitions, 6611 flow [2024-06-14 12:39:48,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 383 transitions, 6407 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:48,636 INFO L231 Difference]: Finished difference. Result has 221 places, 333 transitions, 5443 flow [2024-06-14 12:39:48,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5443, PETRI_PLACES=221, PETRI_TRANSITIONS=333} [2024-06-14 12:39:48,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 12:39:48,637 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 333 transitions, 5443 flow [2024-06-14 12:39:48,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:48,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:48,637 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 12:39:48,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:39:48,637 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:48,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1342633360, now seen corresponding path program 1 times [2024-06-14 12:39:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801603919] [2024-06-14 12:39:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:48,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:49,515 INFO 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 12:39:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:49,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801603919] [2024-06-14 12:39:49,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801603919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:49,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:49,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862826907] [2024-06-14 12:39:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:49,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:49,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 333 transitions, 5443 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:49,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:49,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:51,322 INFO L124 PetriNetUnfolderBase]: 5519/8397 cut-off events. [2024-06-14 12:39:51,322 INFO L125 PetriNetUnfolderBase]: For 497560/497562 co-relation queries the response was YES. [2024-06-14 12:39:51,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72461 conditions, 8397 events. 5519/8397 cut-off events. For 497560/497562 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49219 event pairs, 1338 based on Foata normal form. 24/8420 useless extension candidates. Maximal degree in co-relation 72345. Up to 7079 conditions per place. [2024-06-14 12:39:51,430 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 273 selfloop transitions, 109 changer transitions 0/385 dead transitions. [2024-06-14 12:39:51,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 385 transitions, 6769 flow [2024-06-14 12:39:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 12:39:51,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:39:51,431 INFO L175 Difference]: Start difference. First operand has 221 places, 333 transitions, 5443 flow. Second operand 8 states and 164 transitions. [2024-06-14 12:39:51,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 385 transitions, 6769 flow [2024-06-14 12:39:52,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 385 transitions, 6607 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:52,606 INFO L231 Difference]: Finished difference. Result has 227 places, 342 transitions, 5788 flow [2024-06-14 12:39:52,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5788, PETRI_PLACES=227, PETRI_TRANSITIONS=342} [2024-06-14 12:39:52,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-14 12:39:52,606 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 342 transitions, 5788 flow [2024-06-14 12:39:52,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:52,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:52,607 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 12:39:52,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:39:52,607 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 12:39:52,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -427333164, now seen corresponding path program 2 times [2024-06-14 12:39:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:52,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356222935] [2024-06-14 12:39:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:53,431 INFO 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 12:39:53,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356222935] [2024-06-14 12:39:53,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356222935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:53,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:53,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:53,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733133944] [2024-06-14 12:39:53,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:53,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:53,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:53,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:53,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:53,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 342 transitions, 5788 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:53,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:53,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:53,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:55,330 INFO L124 PetriNetUnfolderBase]: 5603/8533 cut-off events. [2024-06-14 12:39:55,331 INFO L125 PetriNetUnfolderBase]: For 532377/532379 co-relation queries the response was YES. [2024-06-14 12:39:55,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74609 conditions, 8533 events. 5603/8533 cut-off events. For 532377/532379 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 50342 event pairs, 1339 based on Foata normal form. 24/8556 useless extension candidates. Maximal degree in co-relation 74490. Up to 7219 conditions per place. [2024-06-14 12:39:55,432 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 268 selfloop transitions, 121 changer transitions 0/392 dead transitions. [2024-06-14 12:39:55,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 392 transitions, 7068 flow [2024-06-14 12:39:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 12:39:55,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 12:39:55,434 INFO L175 Difference]: Start difference. First operand has 227 places, 342 transitions, 5788 flow. Second operand 8 states and 168 transitions. [2024-06-14 12:39:55,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 392 transitions, 7068 flow [2024-06-14 12:39:56,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 392 transitions, 6892 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:56,708 INFO L231 Difference]: Finished difference. Result has 234 places, 346 transitions, 6064 flow [2024-06-14 12:39:56,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6064, PETRI_PLACES=234, PETRI_TRANSITIONS=346} [2024-06-14 12:39:56,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 12:39:56,709 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 346 transitions, 6064 flow [2024-06-14 12:39:56,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:56,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:56,709 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 12:39:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:39:56,710 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 12:39:56,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -427339116, now seen corresponding path program 6 times [2024-06-14 12:39:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251260622] [2024-06-14 12:39:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:57,550 INFO 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 12:39:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:57,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251260622] [2024-06-14 12:39:57,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251260622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:57,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:57,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:57,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036410001] [2024-06-14 12:39:57,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:57,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:57,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:57,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:57,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 346 transitions, 6064 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:39:57,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:57,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:57,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:59,792 INFO L124 PetriNetUnfolderBase]: 6071/9309 cut-off events. [2024-06-14 12:39:59,792 INFO L125 PetriNetUnfolderBase]: For 666536/666538 co-relation queries the response was YES. [2024-06-14 12:39:59,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80830 conditions, 9309 events. 6071/9309 cut-off events. For 666536/666538 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 56138 event pairs, 1649 based on Foata normal form. 94/9402 useless extension candidates. Maximal degree in co-relation 80708. Up to 7574 conditions per place. [2024-06-14 12:39:59,909 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 301 selfloop transitions, 99 changer transitions 1/404 dead transitions. [2024-06-14 12:39:59,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 404 transitions, 7412 flow [2024-06-14 12:39:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 12:39:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-14 12:39:59,910 INFO L175 Difference]: Start difference. First operand has 234 places, 346 transitions, 6064 flow. Second operand 9 states and 187 transitions. [2024-06-14 12:39:59,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 404 transitions, 7412 flow [2024-06-14 12:40:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 404 transitions, 7152 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:01,218 INFO L231 Difference]: Finished difference. Result has 238 places, 351 transitions, 6162 flow [2024-06-14 12:40:01,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6162, PETRI_PLACES=238, PETRI_TRANSITIONS=351} [2024-06-14 12:40:01,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 12:40:01,219 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 351 transitions, 6162 flow [2024-06-14 12:40:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:01,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:01,219 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 12:40:01,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:40:01,219 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 12:40:01,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash -421976736, now seen corresponding path program 7 times [2024-06-14 12:40:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:01,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030071564] [2024-06-14 12:40:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:02,042 INFO 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 12:40:02,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030071564] [2024-06-14 12:40:02,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030071564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:02,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:02,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:02,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609830495] [2024-06-14 12:40:02,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:02,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:02,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:02,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:02,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 351 transitions, 6162 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:02,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:02,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:02,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:04,180 INFO L124 PetriNetUnfolderBase]: 6535/10081 cut-off events. [2024-06-14 12:40:04,180 INFO L125 PetriNetUnfolderBase]: For 720452/720454 co-relation queries the response was YES. [2024-06-14 12:40:04,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85881 conditions, 10081 events. 6535/10081 cut-off events. For 720452/720454 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 62393 event pairs, 1715 based on Foata normal form. 98/10178 useless extension candidates. Maximal degree in co-relation 85759. Up to 8350 conditions per place. [2024-06-14 12:40:04,352 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 312 selfloop transitions, 90 changer transitions 0/405 dead transitions. [2024-06-14 12:40:04,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 405 transitions, 7425 flow [2024-06-14 12:40:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 12:40:04,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 12:40:04,353 INFO L175 Difference]: Start difference. First operand has 238 places, 351 transitions, 6162 flow. Second operand 9 states and 183 transitions. [2024-06-14 12:40:04,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 405 transitions, 7425 flow [2024-06-14 12:40:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 405 transitions, 7160 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:05,931 INFO L231 Difference]: Finished difference. Result has 241 places, 357 transitions, 6275 flow [2024-06-14 12:40:05,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=241, PETRI_TRANSITIONS=357} [2024-06-14 12:40:05,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-14 12:40:05,932 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 357 transitions, 6275 flow [2024-06-14 12:40:05,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:05,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:05,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:05,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:40:05,933 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 12:40:05,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash -421761534, now seen corresponding path program 3 times [2024-06-14 12:40:05,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:05,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255035481] [2024-06-14 12:40:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:05,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:06,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:06,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255035481] [2024-06-14 12:40:06,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255035481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:06,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:06,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:06,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293016255] [2024-06-14 12:40:06,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:06,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:06,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:06,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:06,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 357 transitions, 6275 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:06,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:06,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:06,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:08,771 INFO L124 PetriNetUnfolderBase]: 6623/10221 cut-off events. [2024-06-14 12:40:08,772 INFO L125 PetriNetUnfolderBase]: For 665376/665378 co-relation queries the response was YES. [2024-06-14 12:40:08,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86848 conditions, 10221 events. 6623/10221 cut-off events. For 665376/665378 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 63524 event pairs, 1579 based on Foata normal form. 20/10240 useless extension candidates. Maximal degree in co-relation 86725. Up to 8039 conditions per place. [2024-06-14 12:40:08,924 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 293 selfloop transitions, 113 changer transitions 0/409 dead transitions. [2024-06-14 12:40:08,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 409 transitions, 7592 flow [2024-06-14 12:40:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:40:08,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-14 12:40:08,925 INFO L175 Difference]: Start difference. First operand has 241 places, 357 transitions, 6275 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:40:08,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 409 transitions, 7592 flow [2024-06-14 12:40:10,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 409 transitions, 7318 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:10,465 INFO L231 Difference]: Finished difference. Result has 243 places, 359 transitions, 6345 flow [2024-06-14 12:40:10,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=243, PETRI_TRANSITIONS=359} [2024-06-14 12:40:10,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 12:40:10,466 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 359 transitions, 6345 flow [2024-06-14 12:40:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:10,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:10,467 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 12:40:10,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:40:10,467 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:10,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash 57772240, now seen corresponding path program 2 times [2024-06-14 12:40:10,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:10,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25388830] [2024-06-14 12:40:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:10,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:11,028 INFO 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 12:40:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25388830] [2024-06-14 12:40:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25388830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:11,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:11,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319265455] [2024-06-14 12:40:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:11,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:11,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:11,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 359 transitions, 6345 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:11,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:11,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:11,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:13,250 INFO L124 PetriNetUnfolderBase]: 6821/10497 cut-off events. [2024-06-14 12:40:13,250 INFO L125 PetriNetUnfolderBase]: For 694651/694653 co-relation queries the response was YES. [2024-06-14 12:40:13,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90451 conditions, 10497 events. 6821/10497 cut-off events. For 694651/694653 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 65176 event pairs, 1832 based on Foata normal form. 14/10510 useless extension candidates. Maximal degree in co-relation 90327. Up to 9396 conditions per place. [2024-06-14 12:40:13,362 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 309 selfloop transitions, 97 changer transitions 0/409 dead transitions. [2024-06-14 12:40:13,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 409 transitions, 8089 flow [2024-06-14 12:40:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:40:13,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-14 12:40:13,363 INFO L175 Difference]: Start difference. First operand has 243 places, 359 transitions, 6345 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:40:13,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 409 transitions, 8089 flow [2024-06-14 12:40:14,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 409 transitions, 7774 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:14,853 INFO L231 Difference]: Finished difference. Result has 245 places, 382 transitions, 6904 flow [2024-06-14 12:40:14,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6904, PETRI_PLACES=245, PETRI_TRANSITIONS=382} [2024-06-14 12:40:14,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-14 12:40:14,854 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 382 transitions, 6904 flow [2024-06-14 12:40:14,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:14,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:14,855 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 12:40:14,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:40:14,855 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 12:40:14,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:14,855 INFO L85 PathProgramCache]: Analyzing trace with hash 823345526, now seen corresponding path program 4 times [2024-06-14 12:40:14,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:14,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99540192] [2024-06-14 12:40:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:14,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:15,613 INFO 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 12:40:15,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:15,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99540192] [2024-06-14 12:40:15,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99540192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:15,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:15,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:15,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711139092] [2024-06-14 12:40:15,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:15,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:15,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 382 transitions, 6904 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:15,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:15,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:17,991 INFO L124 PetriNetUnfolderBase]: 6890/10603 cut-off events. [2024-06-14 12:40:17,991 INFO L125 PetriNetUnfolderBase]: For 723342/723348 co-relation queries the response was YES. [2024-06-14 12:40:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91237 conditions, 10603 events. 6890/10603 cut-off events. For 723342/723348 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 66076 event pairs, 2394 based on Foata normal form. 24/10626 useless extension candidates. Maximal degree in co-relation 91111. Up to 10379 conditions per place. [2024-06-14 12:40:18,118 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 384 selfloop transitions, 31 changer transitions 0/418 dead transitions. [2024-06-14 12:40:18,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 418 transitions, 7984 flow [2024-06-14 12:40:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:40:18,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-14 12:40:18,119 INFO L175 Difference]: Start difference. First operand has 245 places, 382 transitions, 6904 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:40:18,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 418 transitions, 7984 flow [2024-06-14 12:40:19,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 418 transitions, 7829 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 12:40:19,648 INFO L231 Difference]: Finished difference. Result has 250 places, 384 transitions, 6914 flow [2024-06-14 12:40:19,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6914, PETRI_PLACES=250, PETRI_TRANSITIONS=384} [2024-06-14 12:40:19,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 12:40:19,649 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 384 transitions, 6914 flow [2024-06-14 12:40:19,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:19,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:19,649 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 12:40:19,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:40:19,650 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 12:40:19,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:19,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1089050246, now seen corresponding path program 5 times [2024-06-14 12:40:19,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:19,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905808871] [2024-06-14 12:40:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:19,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:20,308 INFO 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 12:40:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905808871] [2024-06-14 12:40:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905808871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:20,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466830972] [2024-06-14 12:40:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:20,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:20,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:20,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:20,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 384 transitions, 6914 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:22,559 INFO L124 PetriNetUnfolderBase]: 6943/10686 cut-off events. [2024-06-14 12:40:22,559 INFO L125 PetriNetUnfolderBase]: For 743796/743802 co-relation queries the response was YES. [2024-06-14 12:40:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91957 conditions, 10686 events. 6943/10686 cut-off events. For 743796/743802 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 66662 event pairs, 2397 based on Foata normal form. 20/10705 useless extension candidates. Maximal degree in co-relation 91830. Up to 10454 conditions per place. [2024-06-14 12:40:22,695 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 29 changer transitions 0/420 dead transitions. [2024-06-14 12:40:22,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 420 transitions, 8002 flow [2024-06-14 12:40:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:40:22,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:40:22,697 INFO L175 Difference]: Start difference. First operand has 250 places, 384 transitions, 6914 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:40:22,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 420 transitions, 8002 flow [2024-06-14 12:40:24,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 420 transitions, 7889 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:24,340 INFO L231 Difference]: Finished difference. Result has 253 places, 386 transitions, 6964 flow [2024-06-14 12:40:24,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6964, PETRI_PLACES=253, PETRI_TRANSITIONS=386} [2024-06-14 12:40:24,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 12:40:24,341 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 386 transitions, 6964 flow [2024-06-14 12:40:24,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:24,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:24,341 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 12:40:24,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:40:24,342 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 12:40:24,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash -152666826, now seen corresponding path program 6 times [2024-06-14 12:40:24,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:24,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190576527] [2024-06-14 12:40:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:24,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:25,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:25,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190576527] [2024-06-14 12:40:25,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190576527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:25,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:25,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:25,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200625259] [2024-06-14 12:40:25,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:25,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:25,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:25,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:25,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:25,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 386 transitions, 6964 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:25,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:25,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:25,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:27,353 INFO L124 PetriNetUnfolderBase]: 7073/10888 cut-off events. [2024-06-14 12:40:27,353 INFO L125 PetriNetUnfolderBase]: For 780044/780050 co-relation queries the response was YES. [2024-06-14 12:40:27,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93691 conditions, 10888 events. 7073/10888 cut-off events. For 780044/780050 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 68218 event pairs, 2448 based on Foata normal form. 24/10911 useless extension candidates. Maximal degree in co-relation 93563. Up to 10481 conditions per place. [2024-06-14 12:40:27,511 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 393 selfloop transitions, 33 changer transitions 0/429 dead transitions. [2024-06-14 12:40:27,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 429 transitions, 8164 flow [2024-06-14 12:40:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:40:27,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-14 12:40:27,513 INFO L175 Difference]: Start difference. First operand has 253 places, 386 transitions, 6964 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:40:27,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 429 transitions, 8164 flow [2024-06-14 12:40:29,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 429 transitions, 8037 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:29,388 INFO L231 Difference]: Finished difference. Result has 256 places, 390 transitions, 7044 flow [2024-06-14 12:40:29,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7044, PETRI_PLACES=256, PETRI_TRANSITIONS=390} [2024-06-14 12:40:29,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 12:40:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 390 transitions, 7044 flow [2024-06-14 12:40:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:29,390 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 12:40:29,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:40:29,390 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:29,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 823137764, now seen corresponding path program 8 times [2024-06-14 12:40:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531450152] [2024-06-14 12:40:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:30,086 INFO 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 12:40:30,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531450152] [2024-06-14 12:40:30,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531450152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:30,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:30,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063708558] [2024-06-14 12:40:30,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:30,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:30,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:30,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:30,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:30,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 390 transitions, 7044 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:30,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:30,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:30,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:32,540 INFO L124 PetriNetUnfolderBase]: 7408/11433 cut-off events. [2024-06-14 12:40:32,540 INFO L125 PetriNetUnfolderBase]: For 932278/932284 co-relation queries the response was YES. [2024-06-14 12:40:32,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97771 conditions, 11433 events. 7408/11433 cut-off events. For 932278/932284 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 72415 event pairs, 2564 based on Foata normal form. 102/11534 useless extension candidates. Maximal degree in co-relation 97641. Up to 10639 conditions per place. [2024-06-14 12:40:32,718 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 390 selfloop transitions, 33 changer transitions 13/439 dead transitions. [2024-06-14 12:40:32,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 439 transitions, 8285 flow [2024-06-14 12:40:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:40:32,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-14 12:40:32,719 INFO L175 Difference]: Start difference. First operand has 256 places, 390 transitions, 7044 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:40:32,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 439 transitions, 8285 flow [2024-06-14 12:40:34,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 439 transitions, 8166 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:34,537 INFO L231 Difference]: Finished difference. Result has 262 places, 389 transitions, 7028 flow [2024-06-14 12:40:34,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=262, PETRI_TRANSITIONS=389} [2024-06-14 12:40:34,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-14 12:40:34,537 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 389 transitions, 7028 flow [2024-06-14 12:40:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:34,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:34,538 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 12:40:34,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:40:34,538 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:34,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1079846036, now seen corresponding path program 7 times [2024-06-14 12:40:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:34,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100764239] [2024-06-14 12:40:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:34,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:35,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100764239] [2024-06-14 12:40:35,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100764239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:35,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:35,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:35,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821755625] [2024-06-14 12:40:35,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:35,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:35,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:35,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:35,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 389 transitions, 7028 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:35,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:35,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:35,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:38,129 INFO L124 PetriNetUnfolderBase]: 7233/11164 cut-off events. [2024-06-14 12:40:38,130 INFO L125 PetriNetUnfolderBase]: For 866280/866286 co-relation queries the response was YES. [2024-06-14 12:40:38,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97342 conditions, 11164 events. 7233/11164 cut-off events. For 866280/866286 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 70480 event pairs, 2520 based on Foata normal form. 22/11185 useless extension candidates. Maximal degree in co-relation 97210. Up to 10861 conditions per place. [2024-06-14 12:40:38,299 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 376 selfloop transitions, 46 changer transitions 0/425 dead transitions. [2024-06-14 12:40:38,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 425 transitions, 8161 flow [2024-06-14 12:40:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:40:38,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:40:38,309 INFO L175 Difference]: Start difference. First operand has 262 places, 389 transitions, 7028 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:40:38,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 425 transitions, 8161 flow [2024-06-14 12:40:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 425 transitions, 7986 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:40,253 INFO L231 Difference]: Finished difference. Result has 265 places, 391 transitions, 7086 flow [2024-06-14 12:40:40,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7086, PETRI_PLACES=265, PETRI_TRANSITIONS=391} [2024-06-14 12:40:40,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 12:40:40,254 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 391 transitions, 7086 flow [2024-06-14 12:40:40,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:40,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:40,254 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 12:40:40,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:40:40,255 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 12:40:40,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1079853476, now seen corresponding path program 8 times [2024-06-14 12:40:40,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:40,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504638918] [2024-06-14 12:40:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:40,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:41,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504638918] [2024-06-14 12:40:41,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504638918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:41,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:41,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:41,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068070068] [2024-06-14 12:40:41,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:41,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:41,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:41,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:41,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 391 transitions, 7086 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:41,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:41,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:41,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:43,594 INFO L124 PetriNetUnfolderBase]: 7269/11220 cut-off events. [2024-06-14 12:40:43,594 INFO L125 PetriNetUnfolderBase]: For 860493/860499 co-relation queries the response was YES. [2024-06-14 12:40:43,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96977 conditions, 11220 events. 7269/11220 cut-off events. For 860493/860499 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70942 event pairs, 2482 based on Foata normal form. 22/11241 useless extension candidates. Maximal degree in co-relation 96844. Up to 10573 conditions per place. [2024-06-14 12:40:43,736 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 379 selfloop transitions, 51 changer transitions 0/433 dead transitions. [2024-06-14 12:40:43,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 433 transitions, 8298 flow [2024-06-14 12:40:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:40:43,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 12:40:43,740 INFO L175 Difference]: Start difference. First operand has 265 places, 391 transitions, 7086 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:40:43,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 433 transitions, 8298 flow [2024-06-14 12:40:45,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 433 transitions, 8142 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:45,833 INFO L231 Difference]: Finished difference. Result has 267 places, 393 transitions, 7154 flow [2024-06-14 12:40:45,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7154, PETRI_PLACES=267, PETRI_TRANSITIONS=393} [2024-06-14 12:40:45,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 12:40:45,834 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 393 transitions, 7154 flow [2024-06-14 12:40:45,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:40:45,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:45,835 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 12:40:45,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:40:45,835 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:45,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash 520015916, now seen corresponding path program 3 times [2024-06-14 12:40:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:45,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498629688] [2024-06-14 12:40:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:46,350 INFO 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 12:40:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498629688] [2024-06-14 12:40:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498629688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:46,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:46,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:46,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873597768] [2024-06-14 12:40:46,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:46,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:46,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 393 transitions, 7154 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:46,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:46,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:46,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:48,724 INFO L124 PetriNetUnfolderBase]: 7251/11200 cut-off events. [2024-06-14 12:40:48,725 INFO L125 PetriNetUnfolderBase]: For 857458/857460 co-relation queries the response was YES. [2024-06-14 12:40:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96614 conditions, 11200 events. 7251/11200 cut-off events. For 857458/857460 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70728 event pairs, 2541 based on Foata normal form. 14/11213 useless extension candidates. Maximal degree in co-relation 96480. Up to 10969 conditions per place. [2024-06-14 12:40:48,863 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 363 selfloop transitions, 44 changer transitions 0/410 dead transitions. [2024-06-14 12:40:48,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 410 transitions, 8166 flow [2024-06-14 12:40:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:40:48,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:40:48,864 INFO L175 Difference]: Start difference. First operand has 267 places, 393 transitions, 7154 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:40:48,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 410 transitions, 8166 flow [2024-06-14 12:40:51,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 410 transitions, 7954 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:51,047 INFO L231 Difference]: Finished difference. Result has 268 places, 393 transitions, 7049 flow [2024-06-14 12:40:51,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7049, PETRI_PLACES=268, PETRI_TRANSITIONS=393} [2024-06-14 12:40:51,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 12:40:51,048 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 393 transitions, 7049 flow [2024-06-14 12:40:51,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:51,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:51,048 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 12:40:51,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:40:51,049 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:51,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1307081636, now seen corresponding path program 1 times [2024-06-14 12:40:51,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:51,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169880915] [2024-06-14 12:40:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:51,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:51,735 INFO 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 12:40:51,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:51,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169880915] [2024-06-14 12:40:51,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169880915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:51,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:51,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:51,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427983378] [2024-06-14 12:40:51,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:51,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:51,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:51,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:51,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:51,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 393 transitions, 7049 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:51,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:51,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:51,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:54,178 INFO L124 PetriNetUnfolderBase]: 7242/11186 cut-off events. [2024-06-14 12:40:54,178 INFO L125 PetriNetUnfolderBase]: For 828771/828771 co-relation queries the response was YES. [2024-06-14 12:40:54,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95691 conditions, 11186 events. 7242/11186 cut-off events. For 828771/828771 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70586 event pairs, 2542 based on Foata normal form. 3/11188 useless extension candidates. Maximal degree in co-relation 95556. Up to 11155 conditions per place. [2024-06-14 12:40:54,322 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 385 selfloop transitions, 19 changer transitions 0/407 dead transitions. [2024-06-14 12:40:54,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 407 transitions, 7951 flow [2024-06-14 12:40:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:40:54,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 12:40:54,324 INFO L175 Difference]: Start difference. First operand has 268 places, 393 transitions, 7049 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:40:54,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 407 transitions, 7951 flow [2024-06-14 12:40:56,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 407 transitions, 7558 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-14 12:40:56,339 INFO L231 Difference]: Finished difference. Result has 266 places, 396 transitions, 6776 flow [2024-06-14 12:40:56,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6656, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6776, PETRI_PLACES=266, PETRI_TRANSITIONS=396} [2024-06-14 12:40:56,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 12:40:56,340 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 396 transitions, 6776 flow [2024-06-14 12:40:56,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:56,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:56,340 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 12:40:56,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:40:56,340 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:56,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash 412466242, now seen corresponding path program 1 times [2024-06-14 12:40:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:56,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454341845] [2024-06-14 12:40:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:56,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454341845] [2024-06-14 12:40:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454341845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361894919] [2024-06-14 12:40:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:57,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:57,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 396 transitions, 6776 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:40:57,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:57,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:57,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:59,689 INFO L124 PetriNetUnfolderBase]: 7237/11179 cut-off events. [2024-06-14 12:40:59,689 INFO L125 PetriNetUnfolderBase]: For 838858/838858 co-relation queries the response was YES. [2024-06-14 12:40:59,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95218 conditions, 11179 events. 7237/11179 cut-off events. For 838858/838858 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70368 event pairs, 2545 based on Foata normal form. 2/11180 useless extension candidates. Maximal degree in co-relation 95084. Up to 11151 conditions per place. [2024-06-14 12:40:59,859 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 391 selfloop transitions, 15 changer transitions 0/409 dead transitions. [2024-06-14 12:40:59,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 409 transitions, 7646 flow [2024-06-14 12:40:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:40:59,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-14 12:40:59,860 INFO L175 Difference]: Start difference. First operand has 266 places, 396 transitions, 6776 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:40:59,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 409 transitions, 7646 flow [2024-06-14 12:41:01,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 409 transitions, 7408 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 12:41:01,506 INFO L231 Difference]: Finished difference. Result has 265 places, 398 transitions, 6609 flow [2024-06-14 12:41:01,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6609, PETRI_PLACES=265, PETRI_TRANSITIONS=398} [2024-06-14 12:41:01,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 12:41:01,506 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 398 transitions, 6609 flow [2024-06-14 12:41:01,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:41:01,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:01,507 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 12:41:01,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:41:01,507 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:01,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:01,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1781417353, now seen corresponding path program 1 times [2024-06-14 12:41:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:01,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900126068] [2024-06-14 12:41:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:02,272 INFO 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 12:41:02,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:02,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900126068] [2024-06-14 12:41:02,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900126068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:02,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:02,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552430113] [2024-06-14 12:41:02,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:02,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:02,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:02,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 398 transitions, 6609 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:41:02,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:02,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:02,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:04,847 INFO L124 PetriNetUnfolderBase]: 7297/11265 cut-off events. [2024-06-14 12:41:04,848 INFO L125 PetriNetUnfolderBase]: For 854626/854628 co-relation queries the response was YES. [2024-06-14 12:41:04,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95366 conditions, 11265 events. 7297/11265 cut-off events. For 854626/854628 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 70939 event pairs, 1930 based on Foata normal form. 14/11278 useless extension candidates. Maximal degree in co-relation 95234. Up to 9791 conditions per place. [2024-06-14 12:41:04,995 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 301 selfloop transitions, 147 changer transitions 0/451 dead transitions. [2024-06-14 12:41:04,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 451 transitions, 8111 flow [2024-06-14 12:41:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 12:41:05,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 12:41:05,003 INFO L175 Difference]: Start difference. First operand has 265 places, 398 transitions, 6609 flow. Second operand 9 states and 183 transitions. [2024-06-14 12:41:05,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 451 transitions, 8111 flow [2024-06-14 12:41:07,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 451 transitions, 8056 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:41:07,194 INFO L231 Difference]: Finished difference. Result has 269 places, 408 transitions, 7087 flow [2024-06-14 12:41:07,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7087, PETRI_PLACES=269, PETRI_TRANSITIONS=408} [2024-06-14 12:41:07,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 12:41:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 408 transitions, 7087 flow [2024-06-14 12:41:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:41:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:07,195 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 12:41:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:41:07,195 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:07,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1785230601, now seen corresponding path program 1 times [2024-06-14 12:41:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:07,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816289901] [2024-06-14 12:41:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:07,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:07,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816289901] [2024-06-14 12:41:07,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816289901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:07,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:07,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:41:07,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640031057] [2024-06-14 12:41:07,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:07,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:41:07,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:41:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:41:07,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 408 transitions, 7087 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:10,166 INFO L124 PetriNetUnfolderBase]: 7291/11259 cut-off events. [2024-06-14 12:41:10,166 INFO L125 PetriNetUnfolderBase]: For 874676/874678 co-relation queries the response was YES. [2024-06-14 12:41:10,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96113 conditions, 11259 events. 7291/11259 cut-off events. For 874676/874678 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 70931 event pairs, 2021 based on Foata normal form. 20/11278 useless extension candidates. Maximal degree in co-relation 95980. Up to 10199 conditions per place. [2024-06-14 12:41:10,313 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 347 selfloop transitions, 95 changer transitions 0/445 dead transitions. [2024-06-14 12:41:10,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 445 transitions, 8499 flow [2024-06-14 12:41:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:41:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:41:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:41:10,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-14 12:41:10,315 INFO L175 Difference]: Start difference. First operand has 269 places, 408 transitions, 7087 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:41:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 445 transitions, 8499 flow [2024-06-14 12:41:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 445 transitions, 8178 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:12,177 INFO L231 Difference]: Finished difference. Result has 270 places, 415 transitions, 7127 flow [2024-06-14 12:41:12,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7127, PETRI_PLACES=270, PETRI_TRANSITIONS=415} [2024-06-14 12:41:12,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 12:41:12,178 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 415 transitions, 7127 flow [2024-06-14 12:41:12,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:12,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:12,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:41:12,179 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:12,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -482701077, now seen corresponding path program 2 times [2024-06-14 12:41:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008235376] [2024-06-14 12:41:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:12,732 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 12:41:12,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008235376] [2024-06-14 12:41:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008235376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:12,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:12,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:41:12,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161223370] [2024-06-14 12:41:12,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:12,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:41:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:41:12,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:41:12,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:12,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 415 transitions, 7127 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:12,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:12,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:12,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:15,170 INFO L124 PetriNetUnfolderBase]: 7273/11235 cut-off events. [2024-06-14 12:41:15,170 INFO L125 PetriNetUnfolderBase]: For 857131/857133 co-relation queries the response was YES. [2024-06-14 12:41:15,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95479 conditions, 11235 events. 7273/11235 cut-off events. For 857131/857133 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 70619 event pairs, 2029 based on Foata normal form. 8/11242 useless extension candidates. Maximal degree in co-relation 95345. Up to 10194 conditions per place. [2024-06-14 12:41:15,295 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 340 selfloop transitions, 98 changer transitions 0/441 dead transitions. [2024-06-14 12:41:15,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 441 transitions, 8371 flow [2024-06-14 12:41:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:41:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:41:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:41:15,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-14 12:41:15,297 INFO L175 Difference]: Start difference. First operand has 270 places, 415 transitions, 7127 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:41:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 441 transitions, 8371 flow [2024-06-14 12:41:17,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 441 transitions, 8213 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:17,079 INFO L231 Difference]: Finished difference. Result has 273 places, 415 transitions, 7179 flow [2024-06-14 12:41:17,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6969, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7179, PETRI_PLACES=273, PETRI_TRANSITIONS=415} [2024-06-14 12:41:17,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 12:41:17,080 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 415 transitions, 7179 flow [2024-06-14 12:41:17,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:17,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:17,081 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 12:41:17,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:41:17,081 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 12:41:17,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1327806987, now seen corresponding path program 1 times [2024-06-14 12:41:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976856286] [2024-06-14 12:41:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:18,123 INFO 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 12:41:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976856286] [2024-06-14 12:41:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976856286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:18,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:18,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:41:18,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121420376] [2024-06-14 12:41:18,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:18,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:41:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:41:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:41:18,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:18,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 415 transitions, 7179 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:18,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:18,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:18,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:20,809 INFO L124 PetriNetUnfolderBase]: 7341/11351 cut-off events. [2024-06-14 12:41:20,809 INFO L125 PetriNetUnfolderBase]: For 909908/909910 co-relation queries the response was YES. [2024-06-14 12:41:20,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96907 conditions, 11351 events. 7341/11351 cut-off events. For 909908/909910 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 71866 event pairs, 2055 based on Foata normal form. 18/11368 useless extension candidates. Maximal degree in co-relation 96772. Up to 10522 conditions per place. [2024-06-14 12:41:20,954 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 375 selfloop transitions, 90 changer transitions 0/468 dead transitions. [2024-06-14 12:41:20,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 468 transitions, 8634 flow [2024-06-14 12:41:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:41:20,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-14 12:41:20,956 INFO L175 Difference]: Start difference. First operand has 273 places, 415 transitions, 7179 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:41:20,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 468 transitions, 8634 flow [2024-06-14 12:41:22,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 468 transitions, 8477 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:22,835 INFO L231 Difference]: Finished difference. Result has 280 places, 428 transitions, 7513 flow [2024-06-14 12:41:22,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7513, PETRI_PLACES=280, PETRI_TRANSITIONS=428} [2024-06-14 12:41:22,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-14 12:41:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 428 transitions, 7513 flow [2024-06-14 12:41:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:22,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:22,838 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 12:41:22,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:41:22,838 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 12:41:22,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash -43207187, now seen corresponding path program 2 times [2024-06-14 12:41:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:22,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994544036] [2024-06-14 12:41:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:22,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:23,576 INFO 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 12:41:23,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994544036] [2024-06-14 12:41:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994544036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:23,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911558389] [2024-06-14 12:41:23,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:23,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:23,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:23,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 428 transitions, 7513 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:41:23,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:23,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:26,145 INFO L124 PetriNetUnfolderBase]: 7398/11431 cut-off events. [2024-06-14 12:41:26,145 INFO L125 PetriNetUnfolderBase]: For 922708/922710 co-relation queries the response was YES. [2024-06-14 12:41:26,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99088 conditions, 11431 events. 7398/11431 cut-off events. For 922708/922710 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 72312 event pairs, 2126 based on Foata normal form. 5/11435 useless extension candidates. Maximal degree in co-relation 98950. Up to 10853 conditions per place. [2024-06-14 12:41:26,301 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 372 selfloop transitions, 99 changer transitions 0/474 dead transitions. [2024-06-14 12:41:26,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 474 transitions, 9369 flow [2024-06-14 12:41:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:41:26,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:41:26,302 INFO L175 Difference]: Start difference. First operand has 280 places, 428 transitions, 7513 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:41:26,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 474 transitions, 9369 flow [2024-06-14 12:41:28,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 474 transitions, 9114 flow, removed 106 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:28,560 INFO L231 Difference]: Finished difference. Result has 286 places, 448 transitions, 7948 flow [2024-06-14 12:41:28,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7948, PETRI_PLACES=286, PETRI_TRANSITIONS=448} [2024-06-14 12:41:28,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 12:41:28,561 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 448 transitions, 7948 flow [2024-06-14 12:41:28,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:41:28,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:28,561 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 12:41:28,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:41:28,562 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:28,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash 433513801, now seen corresponding path program 3 times [2024-06-14 12:41:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:28,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173271176] [2024-06-14 12:41:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:29,084 INFO 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 12:41:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173271176] [2024-06-14 12:41:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173271176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:41:29,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717295342] [2024-06-14 12:41:29,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:41:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:41:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:41:29,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:29,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 448 transitions, 7948 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:29,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:29,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:29,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:31,851 INFO L124 PetriNetUnfolderBase]: 7347/11357 cut-off events. [2024-06-14 12:41:31,852 INFO L125 PetriNetUnfolderBase]: For 925495/925495 co-relation queries the response was YES. [2024-06-14 12:41:31,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97678 conditions, 11357 events. 7347/11357 cut-off events. For 925495/925495 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 71860 event pairs, 2442 based on Foata normal form. 9/11365 useless extension candidates. Maximal degree in co-relation 97537. Up to 11112 conditions per place. [2024-06-14 12:41:32,011 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 40 changer transitions 1/472 dead transitions. [2024-06-14 12:41:32,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 472 transitions, 9136 flow [2024-06-14 12:41:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:41:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:41:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:41:32,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:41:32,012 INFO L175 Difference]: Start difference. First operand has 286 places, 448 transitions, 7948 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:41:32,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 472 transitions, 9136 flow [2024-06-14 12:41:34,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 472 transitions, 8948 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:34,623 INFO L231 Difference]: Finished difference. Result has 290 places, 447 transitions, 7841 flow [2024-06-14 12:41:34,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7841, PETRI_PLACES=290, PETRI_TRANSITIONS=447} [2024-06-14 12:41:34,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-14 12:41:34,634 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 447 transitions, 7841 flow [2024-06-14 12:41:34,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:34,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:34,634 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 12:41:34,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:41:34,634 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:34,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1302199031, now seen corresponding path program 4 times [2024-06-14 12:41:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:34,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935874875] [2024-06-14 12:41:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:35,167 INFO 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 12:41:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935874875] [2024-06-14 12:41:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935874875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:35,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:41:35,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125580836] [2024-06-14 12:41:35,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:41:35,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:41:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:41:35,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:35,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 447 transitions, 7841 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:35,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:35,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:35,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:38,078 INFO L124 PetriNetUnfolderBase]: 7328/11332 cut-off events. [2024-06-14 12:41:38,078 INFO L125 PetriNetUnfolderBase]: For 933606/933606 co-relation queries the response was YES. [2024-06-14 12:41:38,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97012 conditions, 11332 events. 7328/11332 cut-off events. For 933606/933606 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 71665 event pairs, 2454 based on Foata normal form. 9/11340 useless extension candidates. Maximal degree in co-relation 96870. Up to 11253 conditions per place. [2024-06-14 12:41:38,214 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 440 selfloop transitions, 26 changer transitions 0/469 dead transitions. [2024-06-14 12:41:38,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 469 transitions, 8961 flow [2024-06-14 12:41:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:41:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:41:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:41:38,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:41:38,215 INFO L175 Difference]: Start difference. First operand has 290 places, 447 transitions, 7841 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:41:38,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 469 transitions, 8961 flow [2024-06-14 12:41:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 469 transitions, 8824 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:40,409 INFO L231 Difference]: Finished difference. Result has 291 places, 453 transitions, 7903 flow [2024-06-14 12:41:40,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7709, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7903, PETRI_PLACES=291, PETRI_TRANSITIONS=453} [2024-06-14 12:41:40,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 12:41:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 453 transitions, 7903 flow [2024-06-14 12:41:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:40,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:40,411 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 12:41:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:41:40,411 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1351951421, now seen corresponding path program 2 times [2024-06-14 12:41:40,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:40,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560422256] [2024-06-14 12:41:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:41,444 INFO 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 12:41:41,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:41,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560422256] [2024-06-14 12:41:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560422256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:41,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:41:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515497935] [2024-06-14 12:41:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:41:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:41:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:41:41,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:41,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 453 transitions, 7903 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:41,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:41,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:41,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:44,531 INFO L124 PetriNetUnfolderBase]: 7389/11436 cut-off events. [2024-06-14 12:41:44,532 INFO L125 PetriNetUnfolderBase]: For 978484/978490 co-relation queries the response was YES. [2024-06-14 12:41:44,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98180 conditions, 11436 events. 7389/11436 cut-off events. For 978484/978490 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 72696 event pairs, 2410 based on Foata normal form. 24/11459 useless extension candidates. Maximal degree in co-relation 98037. Up to 11026 conditions per place. [2024-06-14 12:41:44,713 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 441 selfloop transitions, 53 changer transitions 0/497 dead transitions. [2024-06-14 12:41:44,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 497 transitions, 9249 flow [2024-06-14 12:41:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:41:44,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:41:44,715 INFO L175 Difference]: Start difference. First operand has 291 places, 453 transitions, 7903 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:41:44,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 497 transitions, 9249 flow [2024-06-14 12:41:47,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 497 transitions, 9196 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:47,123 INFO L231 Difference]: Finished difference. Result has 299 places, 464 transitions, 8265 flow [2024-06-14 12:41:47,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8265, PETRI_PLACES=299, PETRI_TRANSITIONS=464} [2024-06-14 12:41:47,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 12:41:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 464 transitions, 8265 flow [2024-06-14 12:41:47,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:47,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:47,126 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 12:41:47,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:41:47,126 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:47,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash -599179569, now seen corresponding path program 3 times [2024-06-14 12:41:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:47,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037084996] [2024-06-14 12:41:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:47,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:48,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:48,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037084996] [2024-06-14 12:41:48,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037084996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:48,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:48,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:41:48,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768212923] [2024-06-14 12:41:48,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:48,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:41:48,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:41:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:41:48,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:48,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 464 transitions, 8265 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:48,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:48,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:51,498 INFO L124 PetriNetUnfolderBase]: 7518/11655 cut-off events. [2024-06-14 12:41:51,498 INFO L125 PetriNetUnfolderBase]: For 1073846/1073852 co-relation queries the response was YES. [2024-06-14 12:41:51,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100471 conditions, 11655 events. 7518/11655 cut-off events. For 1073846/1073852 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 74373 event pairs, 2390 based on Foata normal form. 48/11702 useless extension candidates. Maximal degree in co-relation 100325. Up to 11198 conditions per place. [2024-06-14 12:41:51,645 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 464 selfloop transitions, 32 changer transitions 11/510 dead transitions. [2024-06-14 12:41:51,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 510 transitions, 9623 flow [2024-06-14 12:41:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:41:51,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-14 12:41:51,646 INFO L175 Difference]: Start difference. First operand has 299 places, 464 transitions, 8265 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:41:51,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 510 transitions, 9623 flow [2024-06-14 12:41:54,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 510 transitions, 9321 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:54,456 INFO L231 Difference]: Finished difference. Result has 304 places, 466 transitions, 8154 flow [2024-06-14 12:41:54,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8154, PETRI_PLACES=304, PETRI_TRANSITIONS=466} [2024-06-14 12:41:54,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 12:41:54,456 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 466 transitions, 8154 flow [2024-06-14 12:41:54,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:54,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:54,457 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 12:41:54,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:41:54,457 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:54,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash -884516775, now seen corresponding path program 1 times [2024-06-14 12:41:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786091817] [2024-06-14 12:41:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:55,501 INFO 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 12:41:55,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:55,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786091817] [2024-06-14 12:41:55,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786091817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:55,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:55,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:55,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694048458] [2024-06-14 12:41:55,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:55,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:55,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:55,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:55,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 466 transitions, 8154 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 12:41:55,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:55,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:55,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:58,724 INFO L124 PetriNetUnfolderBase]: 7518/11655 cut-off events. [2024-06-14 12:41:58,725 INFO L125 PetriNetUnfolderBase]: For 1015724/1015730 co-relation queries the response was YES. [2024-06-14 12:41:58,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98716 conditions, 11655 events. 7518/11655 cut-off events. For 1015724/1015730 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 74364 event pairs, 2508 based on Foata normal form. 30/11684 useless extension candidates. Maximal degree in co-relation 98568. Up to 11181 conditions per place. [2024-06-14 12:41:58,878 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 451 selfloop transitions, 50 changer transitions 0/504 dead transitions. [2024-06-14 12:41:58,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 504 transitions, 9415 flow [2024-06-14 12:41:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:41:58,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 12:41:58,880 INFO L175 Difference]: Start difference. First operand has 304 places, 466 transitions, 8154 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:41:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 504 transitions, 9415 flow [2024-06-14 12:42:01,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 504 transitions, 9252 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:01,818 INFO L231 Difference]: Finished difference. Result has 306 places, 469 transitions, 8232 flow [2024-06-14 12:42:01,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8232, PETRI_PLACES=306, PETRI_TRANSITIONS=469} [2024-06-14 12:42:01,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 12:42:01,819 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 469 transitions, 8232 flow [2024-06-14 12:42:01,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 12:42:01,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:01,819 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 12:42:01,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:42:01,820 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:01,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash -884510079, now seen corresponding path program 4 times [2024-06-14 12:42:01,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:01,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424127278] [2024-06-14 12:42:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:02,904 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 12:42:02,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:02,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424127278] [2024-06-14 12:42:02,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424127278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:02,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:02,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869176606] [2024-06-14 12:42:02,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:03,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:03,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 469 transitions, 8232 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 12:42:03,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:03,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:03,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:06,007 INFO L124 PetriNetUnfolderBase]: 7518/11655 cut-off events. [2024-06-14 12:42:06,008 INFO L125 PetriNetUnfolderBase]: For 1000285/1000291 co-relation queries the response was YES. [2024-06-14 12:42:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97937 conditions, 11655 events. 7518/11655 cut-off events. For 1000285/1000291 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 74315 event pairs, 2468 based on Foata normal form. 24/11678 useless extension candidates. Maximal degree in co-relation 97788. Up to 11276 conditions per place. [2024-06-14 12:42:06,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 452 selfloop transitions, 48 changer transitions 0/503 dead transitions. [2024-06-14 12:42:06,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 503 transitions, 9275 flow [2024-06-14 12:42:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:42:06,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:42:06,172 INFO L175 Difference]: Start difference. First operand has 306 places, 469 transitions, 8232 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:42:06,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 503 transitions, 9275 flow [2024-06-14 12:42:08,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 503 transitions, 9086 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:08,629 INFO L231 Difference]: Finished difference. Result has 307 places, 470 transitions, 8102 flow [2024-06-14 12:42:08,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7945, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8102, PETRI_PLACES=307, PETRI_TRANSITIONS=470} [2024-06-14 12:42:08,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 12:42:08,629 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 470 transitions, 8102 flow [2024-06-14 12:42:08,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 12:42:08,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:08,630 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 12:42:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:42:08,630 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:08,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1562304235, now seen corresponding path program 5 times [2024-06-14 12:42:08,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:08,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58394481] [2024-06-14 12:42:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:09,148 INFO 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 12:42:09,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:09,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58394481] [2024-06-14 12:42:09,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58394481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:09,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:09,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154708931] [2024-06-14 12:42:09,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:09,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:42:09,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:42:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:42:09,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:09,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 470 transitions, 8102 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:09,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:09,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:09,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:11,991 INFO L124 PetriNetUnfolderBase]: 7494/11621 cut-off events. [2024-06-14 12:42:11,991 INFO L125 PetriNetUnfolderBase]: For 949071/949073 co-relation queries the response was YES. [2024-06-14 12:42:12,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96824 conditions, 11621 events. 7494/11621 cut-off events. For 949071/949073 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 74148 event pairs, 2516 based on Foata normal form. 5/11625 useless extension candidates. Maximal degree in co-relation 96674. Up to 11562 conditions per place. [2024-06-14 12:42:12,327 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 453 selfloop transitions, 25 changer transitions 1/482 dead transitions. [2024-06-14 12:42:12,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 482 transitions, 9107 flow [2024-06-14 12:42:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:42:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:42:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:42:12,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:42:12,329 INFO L175 Difference]: Start difference. First operand has 307 places, 470 transitions, 8102 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:42:12,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 482 transitions, 9107 flow [2024-06-14 12:42:14,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 482 transitions, 8846 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:14,593 INFO L231 Difference]: Finished difference. Result has 307 places, 469 transitions, 7882 flow [2024-06-14 12:42:14,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7841, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7882, PETRI_PLACES=307, PETRI_TRANSITIONS=469} [2024-06-14 12:42:14,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 12:42:14,594 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 469 transitions, 7882 flow [2024-06-14 12:42:14,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:14,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:14,594 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 12:42:14,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:42:14,594 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:14,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash -111803127, now seen corresponding path program 6 times [2024-06-14 12:42:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:14,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340102529] [2024-06-14 12:42:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:15,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340102529] [2024-06-14 12:42:15,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340102529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:15,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:15,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517817728] [2024-06-14 12:42:15,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:15,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:42:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:42:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:42:15,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:15,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 469 transitions, 7882 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:15,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:15,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:15,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:18,039 INFO L124 PetriNetUnfolderBase]: 7173/11073 cut-off events. [2024-06-14 12:42:18,039 INFO L125 PetriNetUnfolderBase]: For 944102/944104 co-relation queries the response was YES. [2024-06-14 12:42:18,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92037 conditions, 11073 events. 7173/11073 cut-off events. For 944102/944104 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 69669 event pairs, 2361 based on Foata normal form. 8/11080 useless extension candidates. Maximal degree in co-relation 91887. Up to 10878 conditions per place. [2024-06-14 12:42:18,200 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 419 selfloop transitions, 44 changer transitions 17/483 dead transitions. [2024-06-14 12:42:18,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 483 transitions, 8899 flow [2024-06-14 12:42:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:42:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:42:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:42:18,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:42:18,202 INFO L175 Difference]: Start difference. First operand has 307 places, 469 transitions, 7882 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:42:18,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 483 transitions, 8899 flow [2024-06-14 12:42:20,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 483 transitions, 8699 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-14 12:42:20,831 INFO L231 Difference]: Finished difference. Result has 303 places, 452 transitions, 7491 flow [2024-06-14 12:42:20,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7491, PETRI_PLACES=303, PETRI_TRANSITIONS=452} [2024-06-14 12:42:20,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-14 12:42:20,832 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 452 transitions, 7491 flow [2024-06-14 12:42:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:20,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:20,832 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 12:42:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:42:20,832 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:20,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash -98908584, now seen corresponding path program 1 times [2024-06-14 12:42:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178543658] [2024-06-14 12:42:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178543658] [2024-06-14 12:42:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178543658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:21,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:21,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:21,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828887181] [2024-06-14 12:42:21,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:21,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:21,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:21,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:21,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 452 transitions, 7491 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:42:21,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:21,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:21,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:24,154 INFO L124 PetriNetUnfolderBase]: 6783/10463 cut-off events. [2024-06-14 12:42:24,154 INFO L125 PetriNetUnfolderBase]: For 912180/912182 co-relation queries the response was YES. [2024-06-14 12:42:24,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88154 conditions, 10463 events. 6783/10463 cut-off events. For 912180/912182 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 65219 event pairs, 2078 based on Foata normal form. 14/10476 useless extension candidates. Maximal degree in co-relation 88005. Up to 10215 conditions per place. [2024-06-14 12:42:24,292 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 426 selfloop transitions, 63 changer transitions 0/492 dead transitions. [2024-06-14 12:42:24,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 492 transitions, 9070 flow [2024-06-14 12:42:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:42:24,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:42:24,294 INFO L175 Difference]: Start difference. First operand has 303 places, 452 transitions, 7491 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:42:24,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 492 transitions, 9070 flow [2024-06-14 12:42:26,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 492 transitions, 8867 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 12:42:26,675 INFO L231 Difference]: Finished difference. Result has 304 places, 475 transitions, 7933 flow [2024-06-14 12:42:26,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7933, PETRI_PLACES=304, PETRI_TRANSITIONS=475} [2024-06-14 12:42:26,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 12:42:26,676 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 475 transitions, 7933 flow [2024-06-14 12:42:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:42:26,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:26,677 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 12:42:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:42:26,677 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:26,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -111807095, now seen corresponding path program 3 times [2024-06-14 12:42:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:26,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37157785] [2024-06-14 12:42:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat