./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:58:56,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:58:56,225 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:58:56,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:58:56,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:58:56,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:58:56,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:58:56,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:58:56,276 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:58:56,279 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:58:56,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:58:56,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:58:56,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:58:56,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:58:56,280 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:58:56,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:58:56,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:58:56,280 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:58:56,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:58:56,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:58:56,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:58:56,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:58:56,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:58:56,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:58:56,281 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:58:56,282 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:58:56,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:58:56,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:58:56,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:58:56,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:58:56,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:58:56,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:58:56,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:58:56,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:58:56,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:58:56,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:58:56,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:58:56,284 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:58:56,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:58:56,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:58:56,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:58:56,464 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:58:56,464 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:58:56,465 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:58:57,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:58:57,644 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:58:57,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:58:57,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20e3f8b5e/41f27a6024a344cbab561375840491fc/FLAGb895d5dd9 [2024-06-21 17:58:57,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20e3f8b5e/41f27a6024a344cbab561375840491fc [2024-06-21 17:58:57,669 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:58:57,670 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:58:57,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 17:58:57,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:58:57,789 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:58:57,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:58:57,790 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:58:57,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:58:57,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:58:57" (1/2) ... [2024-06-21 17:58:57,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3924cf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:58:57, skipping insertion in model container [2024-06-21 17:58:57,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:58:57" (1/2) ... [2024-06-21 17:58:57,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9aa76cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:58:57, skipping insertion in model container [2024-06-21 17:58:57,796 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:57" (2/2) ... [2024-06-21 17:58:57,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3924cf87 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:57, skipping insertion in model container [2024-06-21 17:58:57,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:57" (2/2) ... [2024-06-21 17:58:57,797 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:58:57,881 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:58:57,882 INFO L97 edCorrectnessWitness]: Location invariant before [L833-L833] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 17:58:57,882 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 17:58:57,883 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 17:58:57,883 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:58:57,883 INFO L106 edCorrectnessWitness]: ghost_update [L828-L828] multithreaded = 1; [2024-06-21 17:58:57,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:58:58,152 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:58:58,162 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:58:58,281 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:58:58,310 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:58:58,310 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58 WrapperNode [2024-06-21 17:58:58,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:58:58,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:58:58,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:58:58,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:58:58,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,349 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 17:58:58,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:58:58,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:58:58,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:58:58,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:58:58,368 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,371 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,382 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:58:58,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,393 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,395 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,396 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:58:58,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:58:58,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:58:58,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:58:58,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (1/1) ... [2024-06-21 17:58:58,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:58:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:58:58,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:58:58,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:58:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:58:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:58:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:58:58,464 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:58:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:58:58,465 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:58:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:58:58,465 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:58:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:58:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:58:58,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:58:58,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:58:58,467 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:58:58,561 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:58:58,562 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:58:58,832 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:58:58,832 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:58:59,005 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:58:59,005 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:58:59,006 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:58:59 BoogieIcfgContainer [2024-06-21 17:58:59,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:58:59,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:58:59,008 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:58:59,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:58:59,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:58:57" (1/4) ... [2024-06-21 17:58:59,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d831e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:58:59, skipping insertion in model container [2024-06-21 17:58:59,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:57" (2/4) ... [2024-06-21 17:58:59,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d831e0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:58:59, skipping insertion in model container [2024-06-21 17:58:59,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:58" (3/4) ... [2024-06-21 17:58:59,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d831e0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:58:59, skipping insertion in model container [2024-06-21 17:58:59,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:58:59" (4/4) ... [2024-06-21 17:58:59,013 INFO L112 eAbstractionObserver]: Analyzing ICFG safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:58:59,025 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:58:59,025 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:58:59,025 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:58:59,063 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:58:59,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:58:59,131 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:58:59,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:58:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:58:59,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:58:59,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:58:59,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:58:59,145 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;@63e25a26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:58:59,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:58:59,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:58:59,147 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:58:59,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:58:59,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:59,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:58:59,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:59,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:59,152 INFO L85 PathProgramCache]: Analyzing trace with hash 360629915, now seen corresponding path program 1 times [2024-06-21 17:58:59,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:59,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917742756] [2024-06-21 17:58:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:59,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:59,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:59,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917742756] [2024-06-21 17:58:59,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917742756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:59,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:59,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:58:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945898175] [2024-06-21 17:58:59,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:58:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:58:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:58:59,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-21 17:58:59,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:59,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:59,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-21 17:58:59,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:00,224 INFO L124 PetriNetUnfolderBase]: 869/1381 cut-off events. [2024-06-21 17:59:00,224 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 17:59:00,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 1381 events. 869/1381 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7095 event pairs, 566 based on Foata normal form. 1/1340 useless extension candidates. Maximal degree in co-relation 2747. Up to 1315 conditions per place. [2024-06-21 17:59:00,237 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 17:59:00,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-21 17:59:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:59:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:59:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 17:59:00,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-21 17:59:00,247 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-21 17:59:00,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-21 17:59:00,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:00,252 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:59:00,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:59:00,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:59:00,256 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:59:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:00,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:00,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:59:00,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:00,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1326954950, now seen corresponding path program 1 times [2024-06-21 17:59:00,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182164265] [2024-06-21 17:59:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182164265] [2024-06-21 17:59:00,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182164265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:00,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:00,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:59:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155003073] [2024-06-21 17:59:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:59:00,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:59:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:59:00,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-21 17:59:00,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:00,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-21 17:59:00,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:00,975 INFO L124 PetriNetUnfolderBase]: 863/1368 cut-off events. [2024-06-21 17:59:00,975 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-06-21 17:59:00,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3143 conditions, 1368 events. 863/1368 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6887 event pairs, 486 based on Foata normal form. 3/1359 useless extension candidates. Maximal degree in co-relation 3131. Up to 1291 conditions per place. [2024-06-21 17:59:00,981 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 17:59:00,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 236 flow [2024-06-21 17:59:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:59:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:59:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-21 17:59:00,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-21 17:59:00,983 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 107 transitions. [2024-06-21 17:59:00,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 236 flow [2024-06-21 17:59:00,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:59:00,984 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:59:00,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:59:00,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:59:00,985 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:59:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:00,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:00,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:59:00,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:00,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1471908094, now seen corresponding path program 1 times [2024-06-21 17:59:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919132081] [2024-06-21 17:59:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:00,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:01,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:01,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919132081] [2024-06-21 17:59:01,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919132081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:01,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:01,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:59:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003445921] [2024-06-21 17:59:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:59:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:59:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:59:01,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:01,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:01,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:01,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:01,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:01,854 INFO L124 PetriNetUnfolderBase]: 1094/1702 cut-off events. [2024-06-21 17:59:01,854 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2024-06-21 17:59:01,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 1702 events. 1094/1702 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8386 event pairs, 637 based on Foata normal form. 4/1704 useless extension candidates. Maximal degree in co-relation 4339. Up to 1626 conditions per place. [2024-06-21 17:59:01,878 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-21 17:59:01,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 274 flow [2024-06-21 17:59:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:59:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:59:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 17:59:01,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-06-21 17:59:01,879 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 106 transitions. [2024-06-21 17:59:01,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 274 flow [2024-06-21 17:59:01,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 260 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:01,881 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-21 17:59:01,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-21 17:59:01,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-21 17:59:01,882 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-21 17:59:01,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:01,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:01,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:01,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:59:01,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:01,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash -580904584, now seen corresponding path program 1 times [2024-06-21 17:59:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:01,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179196323] [2024-06-21 17:59:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:01,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:02,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179196323] [2024-06-21 17:59:02,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179196323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:02,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:02,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:59:02,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506560578] [2024-06-21 17:59:02,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:02,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:59:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:59:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:59:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 17:59:02,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:02,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:02,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 17:59:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:02,769 INFO L124 PetriNetUnfolderBase]: 1085/1715 cut-off events. [2024-06-21 17:59:02,769 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-21 17:59:02,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4750 conditions, 1715 events. 1085/1715 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8562 event pairs, 369 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 4734. Up to 1569 conditions per place. [2024-06-21 17:59:02,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-21 17:59:02,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 378 flow [2024-06-21 17:59:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 17:59:02,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 17:59:02,779 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 148 transitions. [2024-06-21 17:59:02,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 378 flow [2024-06-21 17:59:02,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:02,781 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-21 17:59:02,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 17:59:02,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 17:59:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-21 17:59:02,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:02,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:02,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:59:02,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash 52750403, now seen corresponding path program 1 times [2024-06-21 17:59:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522614924] [2024-06-21 17:59:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:03,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:03,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522614924] [2024-06-21 17:59:03,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522614924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:03,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:03,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520585735] [2024-06-21 17:59:03,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:03,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:03,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:03,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:03,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:03,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:03,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:03,743 INFO L124 PetriNetUnfolderBase]: 1107/1751 cut-off events. [2024-06-21 17:59:03,744 INFO L125 PetriNetUnfolderBase]: For 2785/2785 co-relation queries the response was YES. [2024-06-21 17:59:03,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1751 events. 1107/1751 cut-off events. For 2785/2785 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8805 event pairs, 429 based on Foata normal form. 4/1751 useless extension candidates. Maximal degree in co-relation 5271. Up to 1581 conditions per place. [2024-06-21 17:59:03,754 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 17:59:03,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 451 flow [2024-06-21 17:59:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 17:59:03,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 17:59:03,757 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 133 transitions. [2024-06-21 17:59:03,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 451 flow [2024-06-21 17:59:03,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 422 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:03,761 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-21 17:59:03,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-21 17:59:03,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 17:59:03,762 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-21 17:59:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:03,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:03,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:03,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:59:03,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:03,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash -915110589, now seen corresponding path program 2 times [2024-06-21 17:59:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701455994] [2024-06-21 17:59:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:04,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:04,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701455994] [2024-06-21 17:59:04,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701455994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:04,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:04,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48668720] [2024-06-21 17:59:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:04,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:04,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:04,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:04,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:04,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:04,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:04,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:04,698 INFO L124 PetriNetUnfolderBase]: 1097/1738 cut-off events. [2024-06-21 17:59:04,698 INFO L125 PetriNetUnfolderBase]: For 3984/3984 co-relation queries the response was YES. [2024-06-21 17:59:04,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 1738 events. 1097/1738 cut-off events. For 3984/3984 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8673 event pairs, 437 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 5630. Up to 1573 conditions per place. [2024-06-21 17:59:04,709 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 46 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-21 17:59:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 426 flow [2024-06-21 17:59:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 17:59:04,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-21 17:59:04,710 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 127 transitions. [2024-06-21 17:59:04,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 426 flow [2024-06-21 17:59:04,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 396 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:04,715 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-21 17:59:04,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-21 17:59:04,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 17:59:04,716 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-21 17:59:04,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:04,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:04,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:59:04,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:04,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 815328861, now seen corresponding path program 1 times [2024-06-21 17:59:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:04,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536331569] [2024-06-21 17:59:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536331569] [2024-06-21 17:59:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536331569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:59:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349211026] [2024-06-21 17:59:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:05,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:59:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:59:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:59:05,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:05,464 INFO L124 PetriNetUnfolderBase]: 1019/1656 cut-off events. [2024-06-21 17:59:05,464 INFO L125 PetriNetUnfolderBase]: For 4335/4335 co-relation queries the response was YES. [2024-06-21 17:59:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5467 conditions, 1656 events. 1019/1656 cut-off events. For 4335/4335 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8373 event pairs, 458 based on Foata normal form. 1/1655 useless extension candidates. Maximal degree in co-relation 5445. Up to 1516 conditions per place. [2024-06-21 17:59:05,474 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-21 17:59:05,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 410 flow [2024-06-21 17:59:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:59:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:59:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-21 17:59:05,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 17:59:05,475 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 5 states and 104 transitions. [2024-06-21 17:59:05,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 410 flow [2024-06-21 17:59:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 366 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:05,479 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 270 flow [2024-06-21 17:59:05,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 17:59:05,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 17:59:05,480 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 270 flow [2024-06-21 17:59:05,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:05,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:05,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:05,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:59:05,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:05,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash -137562176, now seen corresponding path program 1 times [2024-06-21 17:59:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707183860] [2024-06-21 17:59:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:06,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707183860] [2024-06-21 17:59:06,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707183860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:06,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:06,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:06,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093908417] [2024-06-21 17:59:06,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:06,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:06,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:06,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:06,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:06,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:06,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:06,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:06,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:06,580 INFO L124 PetriNetUnfolderBase]: 1116/1775 cut-off events. [2024-06-21 17:59:06,580 INFO L125 PetriNetUnfolderBase]: For 5648/5648 co-relation queries the response was YES. [2024-06-21 17:59:06,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6149 conditions, 1775 events. 1116/1775 cut-off events. For 5648/5648 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8935 event pairs, 451 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 6127. Up to 1627 conditions per place. [2024-06-21 17:59:06,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-06-21 17:59:06,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 512 flow [2024-06-21 17:59:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 17:59:06,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-21 17:59:06,591 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 270 flow. Second operand 7 states and 149 transitions. [2024-06-21 17:59:06,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 512 flow [2024-06-21 17:59:06,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 490 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:06,598 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 312 flow [2024-06-21 17:59:06,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=312, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-21 17:59:06,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 17:59:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 312 flow [2024-06-21 17:59:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:06,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:59:06,601 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)] === [2024-06-21 17:59:06,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash -137442206, now seen corresponding path program 2 times [2024-06-21 17:59:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339794773] [2024-06-21 17:59:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:07,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:07,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339794773] [2024-06-21 17:59:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339794773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056524195] [2024-06-21 17:59:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:07,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:07,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:07,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:07,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:07,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:07,668 INFO L124 PetriNetUnfolderBase]: 1138/1809 cut-off events. [2024-06-21 17:59:07,668 INFO L125 PetriNetUnfolderBase]: For 7196/7196 co-relation queries the response was YES. [2024-06-21 17:59:07,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6736 conditions, 1809 events. 1138/1809 cut-off events. For 7196/7196 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9177 event pairs, 395 based on Foata normal form. 4/1809 useless extension candidates. Maximal degree in co-relation 6713. Up to 1548 conditions per place. [2024-06-21 17:59:07,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-21 17:59:07,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 636 flow [2024-06-21 17:59:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 17:59:07,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-21 17:59:07,679 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 312 flow. Second operand 7 states and 155 transitions. [2024-06-21 17:59:07,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 636 flow [2024-06-21 17:59:07,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 596 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:07,684 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 394 flow [2024-06-21 17:59:07,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-21 17:59:07,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 17:59:07,685 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 394 flow [2024-06-21 17:59:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:07,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:59:07,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -981073118, now seen corresponding path program 3 times [2024-06-21 17:59:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031273003] [2024-06-21 17:59:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031273003] [2024-06-21 17:59:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031273003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:08,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:08,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079862531] [2024-06-21 17:59:08,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:08,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:08,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:08,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:08,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:08,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:08,674 INFO L124 PetriNetUnfolderBase]: 1128/1791 cut-off events. [2024-06-21 17:59:08,675 INFO L125 PetriNetUnfolderBase]: For 9185/9185 co-relation queries the response was YES. [2024-06-21 17:59:08,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 1791 events. 1128/1791 cut-off events. For 9185/9185 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9073 event pairs, 415 based on Foata normal form. 4/1789 useless extension candidates. Maximal degree in co-relation 7053. Up to 1540 conditions per place. [2024-06-21 17:59:08,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 26 changer transitions 0/86 dead transitions. [2024-06-21 17:59:08,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 606 flow [2024-06-21 17:59:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 17:59:08,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-21 17:59:08,692 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 394 flow. Second operand 7 states and 149 transitions. [2024-06-21 17:59:08,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 606 flow [2024-06-21 17:59:08,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 554 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:08,700 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 402 flow [2024-06-21 17:59:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-21 17:59:08,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 17:59:08,703 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 402 flow [2024-06-21 17:59:08,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:08,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:08,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:59:08,704 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:08,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:08,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1987077504, now seen corresponding path program 1 times [2024-06-21 17:59:08,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:08,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577811214] [2024-06-21 17:59:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:08,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:09,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:09,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577811214] [2024-06-21 17:59:09,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577811214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:09,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:09,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17454350] [2024-06-21 17:59:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:09,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:09,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 402 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:09,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:09,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:09,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:09,842 INFO L124 PetriNetUnfolderBase]: 1120/1789 cut-off events. [2024-06-21 17:59:09,842 INFO L125 PetriNetUnfolderBase]: For 10424/10424 co-relation queries the response was YES. [2024-06-21 17:59:09,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7200 conditions, 1789 events. 1120/1789 cut-off events. For 10424/10424 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9005 event pairs, 408 based on Foata normal form. 4/1791 useless extension candidates. Maximal degree in co-relation 7174. Up to 1645 conditions per place. [2024-06-21 17:59:09,850 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-21 17:59:09,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 659 flow [2024-06-21 17:59:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 17:59:09,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 17:59:09,852 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 402 flow. Second operand 7 states and 142 transitions. [2024-06-21 17:59:09,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 659 flow [2024-06-21 17:59:09,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 586 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:09,859 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 415 flow [2024-06-21 17:59:09,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=415, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-21 17:59:09,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 17:59:09,860 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 415 flow [2024-06-21 17:59:09,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:09,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:09,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:09,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:59:09,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:09,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:09,861 INFO L85 PathProgramCache]: Analyzing trace with hash -494607579, now seen corresponding path program 1 times [2024-06-21 17:59:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:09,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713033912] [2024-06-21 17:59:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:10,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:10,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713033912] [2024-06-21 17:59:10,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713033912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:10,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:10,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248380405] [2024-06-21 17:59:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:10,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:10,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:10,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 415 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:10,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:10,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:10,633 INFO L124 PetriNetUnfolderBase]: 1027/1665 cut-off events. [2024-06-21 17:59:10,633 INFO L125 PetriNetUnfolderBase]: For 12014/12022 co-relation queries the response was YES. [2024-06-21 17:59:10,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7082 conditions, 1665 events. 1027/1665 cut-off events. For 12014/12022 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8542 event pairs, 411 based on Foata normal form. 7/1654 useless extension candidates. Maximal degree in co-relation 7054. Up to 1493 conditions per place. [2024-06-21 17:59:10,643 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-21 17:59:10,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 667 flow [2024-06-21 17:59:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 17:59:10,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:59:10,644 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 415 flow. Second operand 6 states and 126 transitions. [2024-06-21 17:59:10,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 667 flow [2024-06-21 17:59:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 626 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:10,654 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 494 flow [2024-06-21 17:59:10,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-21 17:59:10,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 17:59:10,655 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 494 flow [2024-06-21 17:59:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:10,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:10,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:59:10,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:10,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash -761051620, now seen corresponding path program 1 times [2024-06-21 17:59:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642415094] [2024-06-21 17:59:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642415094] [2024-06-21 17:59:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642415094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:11,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630686601] [2024-06-21 17:59:11,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:11,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:11,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:11,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:11,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:11,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:11,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:11,470 INFO L124 PetriNetUnfolderBase]: 1056/1725 cut-off events. [2024-06-21 17:59:11,471 INFO L125 PetriNetUnfolderBase]: For 14337/14345 co-relation queries the response was YES. [2024-06-21 17:59:11,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7816 conditions, 1725 events. 1056/1725 cut-off events. For 14337/14345 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8860 event pairs, 410 based on Foata normal form. 6/1716 useless extension candidates. Maximal degree in co-relation 7786. Up to 1547 conditions per place. [2024-06-21 17:59:11,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 74 selfloop transitions, 20 changer transitions 0/105 dead transitions. [2024-06-21 17:59:11,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 808 flow [2024-06-21 17:59:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 17:59:11,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-21 17:59:11,481 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 494 flow. Second operand 7 states and 148 transitions. [2024-06-21 17:59:11,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 808 flow [2024-06-21 17:59:11,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 767 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:11,493 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 596 flow [2024-06-21 17:59:11,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=596, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-21 17:59:11,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 17:59:11,493 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 596 flow [2024-06-21 17:59:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:11,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:11,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:59:11,494 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)] === [2024-06-21 17:59:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1418102970, now seen corresponding path program 2 times [2024-06-21 17:59:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655985753] [2024-06-21 17:59:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:11,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:11,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655985753] [2024-06-21 17:59:11,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655985753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:11,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:11,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964696369] [2024-06-21 17:59:11,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:11,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:11,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:12,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:12,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:12,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:12,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:12,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:12,298 INFO L124 PetriNetUnfolderBase]: 1058/1733 cut-off events. [2024-06-21 17:59:12,298 INFO L125 PetriNetUnfolderBase]: For 16096/16128 co-relation queries the response was YES. [2024-06-21 17:59:12,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 1733 events. 1058/1733 cut-off events. For 16096/16128 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8977 event pairs, 408 based on Foata normal form. 6/1723 useless extension candidates. Maximal degree in co-relation 8032. Up to 1543 conditions per place. [2024-06-21 17:59:12,309 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 72 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-21 17:59:12,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 860 flow [2024-06-21 17:59:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 17:59:12,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-21 17:59:12,310 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 596 flow. Second operand 6 states and 127 transitions. [2024-06-21 17:59:12,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 860 flow [2024-06-21 17:59:12,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 826 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:12,325 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 658 flow [2024-06-21 17:59:12,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=658, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-21 17:59:12,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 17:59:12,326 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 658 flow [2024-06-21 17:59:12,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:12,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:12,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:59:12,326 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:12,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1431435450, now seen corresponding path program 3 times [2024-06-21 17:59:12,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:12,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738543852] [2024-06-21 17:59:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:12,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:12,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738543852] [2024-06-21 17:59:12,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738543852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:12,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:12,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:12,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301041792] [2024-06-21 17:59:12,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:12,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:12,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:12,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:12,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:12,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:12,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:12,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:12,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:13,191 INFO L124 PetriNetUnfolderBase]: 1050/1709 cut-off events. [2024-06-21 17:59:13,191 INFO L125 PetriNetUnfolderBase]: For 17952/17965 co-relation queries the response was YES. [2024-06-21 17:59:13,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8118 conditions, 1709 events. 1050/1709 cut-off events. For 17952/17965 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8809 event pairs, 413 based on Foata normal form. 6/1692 useless extension candidates. Maximal degree in co-relation 8084. Up to 1508 conditions per place. [2024-06-21 17:59:13,200 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 28 changer transitions 0/99 dead transitions. [2024-06-21 17:59:13,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 860 flow [2024-06-21 17:59:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 17:59:13,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-06-21 17:59:13,201 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 658 flow. Second operand 6 states and 125 transitions. [2024-06-21 17:59:13,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 860 flow [2024-06-21 17:59:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 796 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:13,215 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 658 flow [2024-06-21 17:59:13,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=658, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-06-21 17:59:13,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 17:59:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 658 flow [2024-06-21 17:59:13,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:13,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:13,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:13,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:59:13,216 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:13,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash -678050020, now seen corresponding path program 1 times [2024-06-21 17:59:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:13,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100042262] [2024-06-21 17:59:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:13,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100042262] [2024-06-21 17:59:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100042262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:13,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293405476] [2024-06-21 17:59:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:13,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:13,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:13,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:13,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:13,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:14,060 INFO L124 PetriNetUnfolderBase]: 1169/1877 cut-off events. [2024-06-21 17:59:14,060 INFO L125 PetriNetUnfolderBase]: For 17581/17583 co-relation queries the response was YES. [2024-06-21 17:59:14,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8688 conditions, 1877 events. 1169/1877 cut-off events. For 17581/17583 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9550 event pairs, 425 based on Foata normal form. 2/1877 useless extension candidates. Maximal degree in co-relation 8653. Up to 1738 conditions per place. [2024-06-21 17:59:14,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 88 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-06-21 17:59:14,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 924 flow [2024-06-21 17:59:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 17:59:14,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 17:59:14,073 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 658 flow. Second operand 6 states and 120 transitions. [2024-06-21 17:59:14,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 924 flow [2024-06-21 17:59:14,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 846 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:14,092 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 642 flow [2024-06-21 17:59:14,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=642, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-21 17:59:14,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-21 17:59:14,093 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 642 flow [2024-06-21 17:59:14,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:14,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:14,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:59:14,093 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1847026844, now seen corresponding path program 2 times [2024-06-21 17:59:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149585457] [2024-06-21 17:59:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149585457] [2024-06-21 17:59:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149585457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:14,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:14,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:59:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331701801] [2024-06-21 17:59:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:59:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:59:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:59:14,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:14,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 642 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:14,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:14,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:14,926 INFO L124 PetriNetUnfolderBase]: 1171/1879 cut-off events. [2024-06-21 17:59:14,926 INFO L125 PetriNetUnfolderBase]: For 19796/19798 co-relation queries the response was YES. [2024-06-21 17:59:14,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8962 conditions, 1879 events. 1171/1879 cut-off events. For 19796/19798 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9613 event pairs, 429 based on Foata normal form. 2/1878 useless extension candidates. Maximal degree in co-relation 8926. Up to 1732 conditions per place. [2024-06-21 17:59:14,935 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2024-06-21 17:59:14,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 910 flow [2024-06-21 17:59:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:59:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:59:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 17:59:14,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 17:59:14,937 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 642 flow. Second operand 6 states and 120 transitions. [2024-06-21 17:59:14,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 910 flow [2024-06-21 17:59:14,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 870 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:14,955 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 680 flow [2024-06-21 17:59:14,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-06-21 17:59:14,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 17:59:14,956 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 680 flow [2024-06-21 17:59:14,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:14,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:14,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:14,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:59:14,957 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:14,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1431451322, now seen corresponding path program 1 times [2024-06-21 17:59:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091493473] [2024-06-21 17:59:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:15,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091493473] [2024-06-21 17:59:15,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091493473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:15,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:15,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:15,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013316955] [2024-06-21 17:59:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:15,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:15,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 680 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:15,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:15,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:15,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:16,104 INFO L124 PetriNetUnfolderBase]: 1057/1733 cut-off events. [2024-06-21 17:59:16,104 INFO L125 PetriNetUnfolderBase]: For 21405/21422 co-relation queries the response was YES. [2024-06-21 17:59:16,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 1733 events. 1057/1733 cut-off events. For 21405/21422 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9009 event pairs, 409 based on Foata normal form. 7/1716 useless extension candidates. Maximal degree in co-relation 8734. Up to 1516 conditions per place. [2024-06-21 17:59:16,113 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2024-06-21 17:59:16,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 946 flow [2024-06-21 17:59:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 17:59:16,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 17:59:16,115 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 680 flow. Second operand 7 states and 143 transitions. [2024-06-21 17:59:16,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 946 flow [2024-06-21 17:59:16,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 890 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:16,134 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 747 flow [2024-06-21 17:59:16,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-21 17:59:16,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 17:59:16,135 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 747 flow [2024-06-21 17:59:16,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:16,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:16,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:16,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:59:16,136 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)] === [2024-06-21 17:59:16,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1239944095, now seen corresponding path program 1 times [2024-06-21 17:59:16,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:16,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486085677] [2024-06-21 17:59:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:16,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486085677] [2024-06-21 17:59:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486085677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:16,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390013316] [2024-06-21 17:59:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:16,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:16,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:16,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 747 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:16,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:16,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:17,393 INFO L124 PetriNetUnfolderBase]: 1347/2185 cut-off events. [2024-06-21 17:59:17,393 INFO L125 PetriNetUnfolderBase]: For 28634/28634 co-relation queries the response was YES. [2024-06-21 17:59:17,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11276 conditions, 2185 events. 1347/2185 cut-off events. For 28634/28634 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11587 event pairs, 346 based on Foata normal form. 16/2199 useless extension candidates. Maximal degree in co-relation 11238. Up to 1682 conditions per place. [2024-06-21 17:59:17,403 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-21 17:59:17,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1285 flow [2024-06-21 17:59:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 17:59:17,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-21 17:59:17,409 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 747 flow. Second operand 9 states and 195 transitions. [2024-06-21 17:59:17,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1285 flow [2024-06-21 17:59:17,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1190 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:17,430 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 742 flow [2024-06-21 17:59:17,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=742, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-21 17:59:17,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 17:59:17,431 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 742 flow [2024-06-21 17:59:17,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:17,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:17,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:17,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:59:17,431 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:17,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 946784799, now seen corresponding path program 2 times [2024-06-21 17:59:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:17,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812878805] [2024-06-21 17:59:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:17,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812878805] [2024-06-21 17:59:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812878805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:18,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577171118] [2024-06-21 17:59:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:18,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:18,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:18,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 742 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:18,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:18,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:18,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:18,652 INFO L124 PetriNetUnfolderBase]: 1311/2125 cut-off events. [2024-06-21 17:59:18,652 INFO L125 PetriNetUnfolderBase]: For 29500/29500 co-relation queries the response was YES. [2024-06-21 17:59:18,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10925 conditions, 2125 events. 1311/2125 cut-off events. For 29500/29500 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11212 event pairs, 435 based on Foata normal form. 20/2143 useless extension candidates. Maximal degree in co-relation 10886. Up to 1800 conditions per place. [2024-06-21 17:59:18,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2024-06-21 17:59:18,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 1132 flow [2024-06-21 17:59:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 17:59:18,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-21 17:59:18,665 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 742 flow. Second operand 8 states and 171 transitions. [2024-06-21 17:59:18,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 1132 flow [2024-06-21 17:59:18,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 1096 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:18,684 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 753 flow [2024-06-21 17:59:18,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=753, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-21 17:59:18,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 17:59:18,685 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 753 flow [2024-06-21 17:59:18,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:18,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:18,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:18,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:59:18,685 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)] === [2024-06-21 17:59:18,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1663148031, now seen corresponding path program 3 times [2024-06-21 17:59:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:18,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368987567] [2024-06-21 17:59:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:18,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368987567] [2024-06-21 17:59:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368987567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062678624] [2024-06-21 17:59:19,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:19,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:19,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 753 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:19,889 INFO L124 PetriNetUnfolderBase]: 1386/2248 cut-off events. [2024-06-21 17:59:19,890 INFO L125 PetriNetUnfolderBase]: For 33143/33145 co-relation queries the response was YES. [2024-06-21 17:59:19,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 2248 events. 1386/2248 cut-off events. For 33143/33145 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12057 event pairs, 421 based on Foata normal form. 20/2264 useless extension candidates. Maximal degree in co-relation 11599. Up to 1815 conditions per place. [2024-06-21 17:59:19,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 34 changer transitions 0/136 dead transitions. [2024-06-21 17:59:19,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1153 flow [2024-06-21 17:59:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 17:59:19,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-21 17:59:19,906 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 753 flow. Second operand 8 states and 175 transitions. [2024-06-21 17:59:19,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1153 flow [2024-06-21 17:59:19,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1107 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:19,930 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 804 flow [2024-06-21 17:59:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=804, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-21 17:59:19,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 17:59:19,931 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 804 flow [2024-06-21 17:59:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:19,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:19,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:59:19,931 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)] === [2024-06-21 17:59:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1234395231, now seen corresponding path program 1 times [2024-06-21 17:59:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902937990] [2024-06-21 17:59:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:20,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902937990] [2024-06-21 17:59:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902937990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:20,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:20,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482128998] [2024-06-21 17:59:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:20,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:20,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 804 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:20,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:20,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:20,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:21,309 INFO L124 PetriNetUnfolderBase]: 1403/2284 cut-off events. [2024-06-21 17:59:21,309 INFO L125 PetriNetUnfolderBase]: For 34672/34672 co-relation queries the response was YES. [2024-06-21 17:59:21,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11989 conditions, 2284 events. 1403/2284 cut-off events. For 34672/34672 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12329 event pairs, 423 based on Foata normal form. 4/2284 useless extension candidates. Maximal degree in co-relation 11947. Up to 2039 conditions per place. [2024-06-21 17:59:21,322 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2024-06-21 17:59:21,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1203 flow [2024-06-21 17:59:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 17:59:21,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:59:21,325 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 804 flow. Second operand 8 states and 168 transitions. [2024-06-21 17:59:21,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1203 flow [2024-06-21 17:59:21,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 137 transitions, 1126 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:21,350 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 842 flow [2024-06-21 17:59:21,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=842, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-21 17:59:21,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 17:59:21,351 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 842 flow [2024-06-21 17:59:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:21,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:21,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:21,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:59:21,352 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)] === [2024-06-21 17:59:21,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1209498881, now seen corresponding path program 4 times [2024-06-21 17:59:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289702233] [2024-06-21 17:59:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:21,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289702233] [2024-06-21 17:59:21,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289702233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:21,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:21,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:21,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361193515] [2024-06-21 17:59:21,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:21,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:21,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:22,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:22,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:22,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:22,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:22,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:22,581 INFO L124 PetriNetUnfolderBase]: 1428/2322 cut-off events. [2024-06-21 17:59:22,581 INFO L125 PetriNetUnfolderBase]: For 38794/38794 co-relation queries the response was YES. [2024-06-21 17:59:22,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12371 conditions, 2322 events. 1428/2322 cut-off events. For 38794/38794 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12519 event pairs, 409 based on Foata normal form. 20/2332 useless extension candidates. Maximal degree in co-relation 12327. Up to 1889 conditions per place. [2024-06-21 17:59:22,594 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 35 changer transitions 0/140 dead transitions. [2024-06-21 17:59:22,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1256 flow [2024-06-21 17:59:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 17:59:22,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-21 17:59:22,595 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 842 flow. Second operand 8 states and 171 transitions. [2024-06-21 17:59:22,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1256 flow [2024-06-21 17:59:22,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1187 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:22,617 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 876 flow [2024-06-21 17:59:22,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-06-21 17:59:22,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 17:59:22,617 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 876 flow [2024-06-21 17:59:22,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:22,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:22,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:59:22,618 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1336076193, now seen corresponding path program 2 times [2024-06-21 17:59:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953591987] [2024-06-21 17:59:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:23,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:23,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953591987] [2024-06-21 17:59:23,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953591987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:23,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:23,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934242921] [2024-06-21 17:59:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:23,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:23,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 876 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:23,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:23,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:23,970 INFO L124 PetriNetUnfolderBase]: 1456/2387 cut-off events. [2024-06-21 17:59:23,971 INFO L125 PetriNetUnfolderBase]: For 40081/40081 co-relation queries the response was YES. [2024-06-21 17:59:23,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12796 conditions, 2387 events. 1456/2387 cut-off events. For 40081/40081 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13000 event pairs, 433 based on Foata normal form. 4/2385 useless extension candidates. Maximal degree in co-relation 12751. Up to 2125 conditions per place. [2024-06-21 17:59:23,984 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 106 selfloop transitions, 28 changer transitions 0/141 dead transitions. [2024-06-21 17:59:23,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 141 transitions, 1289 flow [2024-06-21 17:59:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 17:59:23,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 17:59:23,985 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 876 flow. Second operand 8 states and 165 transitions. [2024-06-21 17:59:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 141 transitions, 1289 flow [2024-06-21 17:59:24,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1204 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:24,017 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 929 flow [2024-06-21 17:59:24,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-21 17:59:24,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-21 17:59:24,017 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 929 flow [2024-06-21 17:59:24,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:24,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:24,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:24,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:59:24,018 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)] === [2024-06-21 17:59:24,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1136168645, now seen corresponding path program 3 times [2024-06-21 17:59:24,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:24,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806772706] [2024-06-21 17:59:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:24,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806772706] [2024-06-21 17:59:24,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806772706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:24,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:24,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:24,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780300885] [2024-06-21 17:59:24,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:24,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:24,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 929 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:24,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:25,380 INFO L124 PetriNetUnfolderBase]: 1473/2424 cut-off events. [2024-06-21 17:59:25,380 INFO L125 PetriNetUnfolderBase]: For 42972/42972 co-relation queries the response was YES. [2024-06-21 17:59:25,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 2424 events. 1473/2424 cut-off events. For 42972/42972 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13311 event pairs, 438 based on Foata normal form. 4/2422 useless extension candidates. Maximal degree in co-relation 13157. Up to 2152 conditions per place. [2024-06-21 17:59:25,395 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 31 changer transitions 0/145 dead transitions. [2024-06-21 17:59:25,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1342 flow [2024-06-21 17:59:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 17:59:25,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 17:59:25,396 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 929 flow. Second operand 8 states and 164 transitions. [2024-06-21 17:59:25,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1342 flow [2024-06-21 17:59:25,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1255 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:25,462 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 970 flow [2024-06-21 17:59:25,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=970, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-06-21 17:59:25,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 17:59:25,463 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 970 flow [2024-06-21 17:59:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:25,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:25,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:25,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:59:25,463 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)] === [2024-06-21 17:59:25,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1127546279, now seen corresponding path program 4 times [2024-06-21 17:59:25,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:25,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350620683] [2024-06-21 17:59:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:25,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:26,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350620683] [2024-06-21 17:59:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350620683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:26,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678071112] [2024-06-21 17:59:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:26,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:26,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:26,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:26,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 970 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:26,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:26,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:26,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:26,822 INFO L124 PetriNetUnfolderBase]: 1465/2412 cut-off events. [2024-06-21 17:59:26,822 INFO L125 PetriNetUnfolderBase]: For 45376/45376 co-relation queries the response was YES. [2024-06-21 17:59:26,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13258 conditions, 2412 events. 1465/2412 cut-off events. For 45376/45376 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13252 event pairs, 380 based on Foata normal form. 4/2410 useless extension candidates. Maximal degree in co-relation 13210. Up to 2063 conditions per place. [2024-06-21 17:59:26,839 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 38 changer transitions 0/148 dead transitions. [2024-06-21 17:59:26,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 1376 flow [2024-06-21 17:59:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 17:59:26,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 17:59:26,841 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 970 flow. Second operand 8 states and 165 transitions. [2024-06-21 17:59:26,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 1376 flow [2024-06-21 17:59:26,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1300 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:26,879 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 1021 flow [2024-06-21 17:59:26,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1021, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2024-06-21 17:59:26,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 17:59:26,880 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 1021 flow [2024-06-21 17:59:26,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:26,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:26,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:59:26,880 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:26,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1218389320, now seen corresponding path program 1 times [2024-06-21 17:59:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:26,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50414432] [2024-06-21 17:59:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:27,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:27,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50414432] [2024-06-21 17:59:27,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50414432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:27,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:27,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:27,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317958326] [2024-06-21 17:59:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:27,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:27,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:27,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:27,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:27,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:27,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:27,809 INFO L124 PetriNetUnfolderBase]: 1521/2502 cut-off events. [2024-06-21 17:59:27,809 INFO L125 PetriNetUnfolderBase]: For 50591/50591 co-relation queries the response was YES. [2024-06-21 17:59:27,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14024 conditions, 2502 events. 1521/2502 cut-off events. For 50591/50591 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13795 event pairs, 437 based on Foata normal form. 4/2500 useless extension candidates. Maximal degree in co-relation 13975. Up to 2221 conditions per place. [2024-06-21 17:59:27,824 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 17:59:27,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 147 transitions, 1505 flow [2024-06-21 17:59:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 17:59:27,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 17:59:27,826 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 1021 flow. Second operand 7 states and 143 transitions. [2024-06-21 17:59:27,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 147 transitions, 1505 flow [2024-06-21 17:59:27,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 147 transitions, 1396 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:27,878 INFO L231 Difference]: Finished difference. Result has 116 places, 129 transitions, 1082 flow [2024-06-21 17:59:27,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1082, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2024-06-21 17:59:27,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:59:27,879 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 1082 flow [2024-06-21 17:59:27,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:27,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:27,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:27,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:59:27,879 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:27,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1423525732, now seen corresponding path program 2 times [2024-06-21 17:59:27,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:27,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157127457] [2024-06-21 17:59:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:27,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:28,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157127457] [2024-06-21 17:59:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157127457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:28,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742541156] [2024-06-21 17:59:28,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:28,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:28,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:28,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 1082 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:28,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:28,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:28,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:28,874 INFO L124 PetriNetUnfolderBase]: 1581/2588 cut-off events. [2024-06-21 17:59:28,874 INFO L125 PetriNetUnfolderBase]: For 58556/58556 co-relation queries the response was YES. [2024-06-21 17:59:28,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 2588 events. 1581/2588 cut-off events. For 58556/58556 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14456 event pairs, 451 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 15059. Up to 2201 conditions per place. [2024-06-21 17:59:28,890 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 46 changer transitions 0/167 dead transitions. [2024-06-21 17:59:28,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 167 transitions, 1797 flow [2024-06-21 17:59:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 17:59:28,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 17:59:28,891 INFO L175 Difference]: Start difference. First operand has 116 places, 129 transitions, 1082 flow. Second operand 7 states and 145 transitions. [2024-06-21 17:59:28,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 167 transitions, 1797 flow [2024-06-21 17:59:28,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1726 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:28,943 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1381 flow [2024-06-21 17:59:28,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1381, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2024-06-21 17:59:28,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 17:59:28,943 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1381 flow [2024-06-21 17:59:28,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:28,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:28,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:28,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:59:28,944 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:28,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1423258822, now seen corresponding path program 3 times [2024-06-21 17:59:28,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:28,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234262115] [2024-06-21 17:59:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:29,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:29,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234262115] [2024-06-21 17:59:29,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234262115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:29,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:29,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855367317] [2024-06-21 17:59:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:29,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:29,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:29,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:29,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:29,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:29,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:29,936 INFO L124 PetriNetUnfolderBase]: 1573/2578 cut-off events. [2024-06-21 17:59:29,936 INFO L125 PetriNetUnfolderBase]: For 62378/62378 co-relation queries the response was YES. [2024-06-21 17:59:29,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15700 conditions, 2578 events. 1573/2578 cut-off events. For 62378/62378 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14385 event pairs, 458 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 15645. Up to 2198 conditions per place. [2024-06-21 17:59:29,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-06-21 17:59:29,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 169 transitions, 1935 flow [2024-06-21 17:59:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 17:59:29,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 17:59:29,952 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1381 flow. Second operand 7 states and 145 transitions. [2024-06-21 17:59:29,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 169 transitions, 1935 flow [2024-06-21 17:59:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 1810 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:30,024 INFO L231 Difference]: Finished difference. Result has 128 places, 152 transitions, 1434 flow [2024-06-21 17:59:30,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=128, PETRI_TRANSITIONS=152} [2024-06-21 17:59:30,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 17:59:30,025 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 152 transitions, 1434 flow [2024-06-21 17:59:30,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:30,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:30,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:30,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:59:30,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:30,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1425319590, now seen corresponding path program 1 times [2024-06-21 17:59:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:30,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771198170] [2024-06-21 17:59:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:30,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:30,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:30,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771198170] [2024-06-21 17:59:30,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771198170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:30,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:30,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:30,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761304343] [2024-06-21 17:59:30,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:30,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:30,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:30,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 152 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:30,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:30,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:30,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:31,247 INFO L124 PetriNetUnfolderBase]: 1506/2510 cut-off events. [2024-06-21 17:59:31,247 INFO L125 PetriNetUnfolderBase]: For 67574/67597 co-relation queries the response was YES. [2024-06-21 17:59:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15127 conditions, 2510 events. 1506/2510 cut-off events. For 67574/67597 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14318 event pairs, 453 based on Foata normal form. 12/2494 useless extension candidates. Maximal degree in co-relation 15069. Up to 2094 conditions per place. [2024-06-21 17:59:31,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 45 changer transitions 0/169 dead transitions. [2024-06-21 17:59:31,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 169 transitions, 1808 flow [2024-06-21 17:59:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 17:59:31,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 17:59:31,266 INFO L175 Difference]: Start difference. First operand has 128 places, 152 transitions, 1434 flow. Second operand 8 states and 163 transitions. [2024-06-21 17:59:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 169 transitions, 1808 flow [2024-06-21 17:59:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 169 transitions, 1731 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:31,324 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1493 flow [2024-06-21 17:59:31,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-06-21 17:59:31,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 17:59:31,325 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1493 flow [2024-06-21 17:59:31,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:31,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:31,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:59:31,325 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:31,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2021382663, now seen corresponding path program 1 times [2024-06-21 17:59:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:31,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165738986] [2024-06-21 17:59:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:31,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165738986] [2024-06-21 17:59:31,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165738986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:31,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:31,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:31,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686962215] [2024-06-21 17:59:31,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:31,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:31,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:31,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1493 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:31,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:31,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:31,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:32,297 INFO L124 PetriNetUnfolderBase]: 1614/2648 cut-off events. [2024-06-21 17:59:32,297 INFO L125 PetriNetUnfolderBase]: For 67837/67837 co-relation queries the response was YES. [2024-06-21 17:59:32,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16030 conditions, 2648 events. 1614/2648 cut-off events. For 67837/67837 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14838 event pairs, 450 based on Foata normal form. 2/2647 useless extension candidates. Maximal degree in co-relation 15972. Up to 2402 conditions per place. [2024-06-21 17:59:32,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2024-06-21 17:59:32,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 178 transitions, 1956 flow [2024-06-21 17:59:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 17:59:32,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 17:59:32,316 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1493 flow. Second operand 7 states and 144 transitions. [2024-06-21 17:59:32,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 178 transitions, 1956 flow [2024-06-21 17:59:32,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1848 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:32,382 INFO L231 Difference]: Finished difference. Result has 133 places, 157 transitions, 1488 flow [2024-06-21 17:59:32,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1488, PETRI_PLACES=133, PETRI_TRANSITIONS=157} [2024-06-21 17:59:32,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 17:59:32,383 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 157 transitions, 1488 flow [2024-06-21 17:59:32,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:32,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:32,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:32,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:59:32,383 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:32,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1385651355, now seen corresponding path program 2 times [2024-06-21 17:59:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:32,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308294560] [2024-06-21 17:59:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:32,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:32,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308294560] [2024-06-21 17:59:32,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308294560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:32,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:32,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792019846] [2024-06-21 17:59:32,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:32,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:32,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:32,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:32,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 157 transitions, 1488 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:32,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:32,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:33,305 INFO L124 PetriNetUnfolderBase]: 1640/2699 cut-off events. [2024-06-21 17:59:33,306 INFO L125 PetriNetUnfolderBase]: For 72463/72463 co-relation queries the response was YES. [2024-06-21 17:59:33,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16371 conditions, 2699 events. 1640/2699 cut-off events. For 72463/72463 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15286 event pairs, 461 based on Foata normal form. 2/2698 useless extension candidates. Maximal degree in co-relation 16312. Up to 2415 conditions per place. [2024-06-21 17:59:33,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-06-21 17:59:33,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 184 transitions, 2089 flow [2024-06-21 17:59:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 17:59:33,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 17:59:33,324 INFO L175 Difference]: Start difference. First operand has 133 places, 157 transitions, 1488 flow. Second operand 7 states and 144 transitions. [2024-06-21 17:59:33,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 184 transitions, 2089 flow [2024-06-21 17:59:33,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 184 transitions, 2039 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:33,402 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1649 flow [2024-06-21 17:59:33,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1649, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2024-06-21 17:59:33,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 17:59:33,403 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1649 flow [2024-06-21 17:59:33,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:33,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:33,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:59:33,403 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:33,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 227415033, now seen corresponding path program 3 times [2024-06-21 17:59:33,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:33,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523224488] [2024-06-21 17:59:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523224488] [2024-06-21 17:59:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523224488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:33,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:33,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:33,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114883047] [2024-06-21 17:59:33,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:33,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:33,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:33,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1649 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:33,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:33,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:33,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:34,387 INFO L124 PetriNetUnfolderBase]: 1634/2686 cut-off events. [2024-06-21 17:59:34,388 INFO L125 PetriNetUnfolderBase]: For 75763/75763 co-relation queries the response was YES. [2024-06-21 17:59:34,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16469 conditions, 2686 events. 1634/2686 cut-off events. For 75763/75763 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15162 event pairs, 466 based on Foata normal form. 2/2682 useless extension candidates. Maximal degree in co-relation 16408. Up to 2430 conditions per place. [2024-06-21 17:59:34,408 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 21 changer transitions 0/183 dead transitions. [2024-06-21 17:59:34,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 183 transitions, 2067 flow [2024-06-21 17:59:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 17:59:34,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-21 17:59:34,409 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1649 flow. Second operand 7 states and 141 transitions. [2024-06-21 17:59:34,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 183 transitions, 2067 flow [2024-06-21 17:59:34,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 183 transitions, 1975 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:34,486 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1605 flow [2024-06-21 17:59:34,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1605, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-21 17:59:34,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 17:59:34,486 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1605 flow [2024-06-21 17:59:34,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:34,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:34,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:34,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:59:34,487 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:34,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash -884651079, now seen corresponding path program 4 times [2024-06-21 17:59:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069702959] [2024-06-21 17:59:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:34,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:34,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069702959] [2024-06-21 17:59:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069702959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:34,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:34,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16458046] [2024-06-21 17:59:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:34,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:34,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:35,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:35,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1605 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:35,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:35,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:35,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:35,465 INFO L124 PetriNetUnfolderBase]: 1618/2664 cut-off events. [2024-06-21 17:59:35,465 INFO L125 PetriNetUnfolderBase]: For 78179/78179 co-relation queries the response was YES. [2024-06-21 17:59:35,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16215 conditions, 2664 events. 1618/2664 cut-off events. For 78179/78179 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15081 event pairs, 459 based on Foata normal form. 4/2662 useless extension candidates. Maximal degree in co-relation 16153. Up to 2356 conditions per place. [2024-06-21 17:59:35,484 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-21 17:59:35,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 181 transitions, 2017 flow [2024-06-21 17:59:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 17:59:35,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 17:59:35,486 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1605 flow. Second operand 7 states and 142 transitions. [2024-06-21 17:59:35,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 181 transitions, 2017 flow [2024-06-21 17:59:35,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 181 transitions, 1922 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:35,576 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1580 flow [2024-06-21 17:59:35,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1580, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-21 17:59:35,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 17:59:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1580 flow [2024-06-21 17:59:35,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:35,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:35,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:35,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:59:35,577 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:35,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1171336187, now seen corresponding path program 5 times [2024-06-21 17:59:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:35,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298114788] [2024-06-21 17:59:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:35,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298114788] [2024-06-21 17:59:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298114788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:36,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:36,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761576414] [2024-06-21 17:59:36,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:36,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:36,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1580 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:36,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:36,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:36,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:36,630 INFO L124 PetriNetUnfolderBase]: 1638/2693 cut-off events. [2024-06-21 17:59:36,630 INFO L125 PetriNetUnfolderBase]: For 82210/82210 co-relation queries the response was YES. [2024-06-21 17:59:36,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2693 events. 1638/2693 cut-off events. For 82210/82210 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15247 event pairs, 471 based on Foata normal form. 4/2689 useless extension candidates. Maximal degree in co-relation 16418. Up to 2268 conditions per place. [2024-06-21 17:59:36,649 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-21 17:59:36,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 184 transitions, 2119 flow [2024-06-21 17:59:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 17:59:36,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 17:59:36,650 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1580 flow. Second operand 7 states and 144 transitions. [2024-06-21 17:59:36,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 184 transitions, 2119 flow [2024-06-21 17:59:36,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2031 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:36,719 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1666 flow [2024-06-21 17:59:36,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1666, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-21 17:59:36,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 17:59:36,720 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1666 flow [2024-06-21 17:59:36,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:36,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:36,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:59:36,721 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:36,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:36,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1812856731, now seen corresponding path program 6 times [2024-06-21 17:59:36,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:36,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045461802] [2024-06-21 17:59:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:36,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:37,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045461802] [2024-06-21 17:59:37,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045461802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:37,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:37,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489045508] [2024-06-21 17:59:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:37,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:37,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:37,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1666 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:37,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:37,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:37,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:37,710 INFO L124 PetriNetUnfolderBase]: 1622/2673 cut-off events. [2024-06-21 17:59:37,710 INFO L125 PetriNetUnfolderBase]: For 84090/84090 co-relation queries the response was YES. [2024-06-21 17:59:37,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16415 conditions, 2673 events. 1622/2673 cut-off events. For 84090/84090 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15153 event pairs, 464 based on Foata normal form. 4/2669 useless extension candidates. Maximal degree in co-relation 16351. Up to 2255 conditions per place. [2024-06-21 17:59:37,729 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2024-06-21 17:59:37,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 183 transitions, 2080 flow [2024-06-21 17:59:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 17:59:37,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 17:59:37,730 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1666 flow. Second operand 7 states and 143 transitions. [2024-06-21 17:59:37,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 183 transitions, 2080 flow [2024-06-21 17:59:37,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 183 transitions, 1954 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:37,827 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1661 flow [2024-06-21 17:59:37,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1661, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-21 17:59:37,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 17:59:37,828 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1661 flow [2024-06-21 17:59:37,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:37,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:37,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:37,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:59:37,828 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:37,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:37,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1179915995, now seen corresponding path program 1 times [2024-06-21 17:59:37,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:37,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468154038] [2024-06-21 17:59:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:37,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468154038] [2024-06-21 17:59:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468154038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:38,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:38,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49856729] [2024-06-21 17:59:38,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:38,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:38,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:38,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:38,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1661 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:38,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:38,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:38,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:39,028 INFO L124 PetriNetUnfolderBase]: 1513/2542 cut-off events. [2024-06-21 17:59:39,028 INFO L125 PetriNetUnfolderBase]: For 85652/85675 co-relation queries the response was YES. [2024-06-21 17:59:39,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15664 conditions, 2542 events. 1513/2542 cut-off events. For 85652/85675 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14745 event pairs, 448 based on Foata normal form. 2/2519 useless extension candidates. Maximal degree in co-relation 15599. Up to 2141 conditions per place. [2024-06-21 17:59:39,048 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 42 changer transitions 0/182 dead transitions. [2024-06-21 17:59:39,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 182 transitions, 2027 flow [2024-06-21 17:59:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 17:59:39,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 17:59:39,049 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1661 flow. Second operand 8 states and 160 transitions. [2024-06-21 17:59:39,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 182 transitions, 2027 flow [2024-06-21 17:59:39,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 182 transitions, 1823 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:39,131 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1587 flow [2024-06-21 17:59:39,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1587, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-21 17:59:39,131 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 17:59:39,131 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1587 flow [2024-06-21 17:59:39,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:39,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:39,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:39,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:59:39,132 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:39,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1224239451, now seen corresponding path program 1 times [2024-06-21 17:59:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:39,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833242192] [2024-06-21 17:59:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:39,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:39,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833242192] [2024-06-21 17:59:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833242192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:39,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:39,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:39,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83657920] [2024-06-21 17:59:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:39,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:39,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:39,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:39,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1587 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:39,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:39,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:39,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:40,239 INFO L124 PetriNetUnfolderBase]: 1613/2661 cut-off events. [2024-06-21 17:59:40,239 INFO L125 PetriNetUnfolderBase]: For 87083/87085 co-relation queries the response was YES. [2024-06-21 17:59:40,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16442 conditions, 2661 events. 1613/2661 cut-off events. For 87083/87085 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15127 event pairs, 453 based on Foata normal form. 1/2660 useless extension candidates. Maximal degree in co-relation 16377. Up to 2439 conditions per place. [2024-06-21 17:59:40,262 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2024-06-21 17:59:40,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 190 transitions, 2053 flow [2024-06-21 17:59:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 17:59:40,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 17:59:40,264 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1587 flow. Second operand 7 states and 138 transitions. [2024-06-21 17:59:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 190 transitions, 2053 flow [2024-06-21 17:59:40,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 190 transitions, 1949 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:40,375 INFO L231 Difference]: Finished difference. Result has 145 places, 174 transitions, 1575 flow [2024-06-21 17:59:40,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=145, PETRI_TRANSITIONS=174} [2024-06-21 17:59:40,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 17:59:40,375 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 174 transitions, 1575 flow [2024-06-21 17:59:40,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:40,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:40,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:59:40,376 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1229007995, now seen corresponding path program 1 times [2024-06-21 17:59:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116573236] [2024-06-21 17:59:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:41,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:41,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116573236] [2024-06-21 17:59:41,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116573236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:41,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:41,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:41,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181681040] [2024-06-21 17:59:41,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:41,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:41,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:41,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:41,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:41,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 174 transitions, 1575 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:41,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:41,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:41,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:41,589 INFO L124 PetriNetUnfolderBase]: 1623/2682 cut-off events. [2024-06-21 17:59:41,589 INFO L125 PetriNetUnfolderBase]: For 92457/92457 co-relation queries the response was YES. [2024-06-21 17:59:41,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16757 conditions, 2682 events. 1623/2682 cut-off events. For 92457/92457 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15248 event pairs, 446 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 16691. Up to 2391 conditions per place. [2024-06-21 17:59:41,608 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 34 changer transitions 0/208 dead transitions. [2024-06-21 17:59:41,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 208 transitions, 2213 flow [2024-06-21 17:59:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 17:59:41,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 17:59:41,610 INFO L175 Difference]: Start difference. First operand has 145 places, 174 transitions, 1575 flow. Second operand 8 states and 157 transitions. [2024-06-21 17:59:41,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 208 transitions, 2213 flow [2024-06-21 17:59:41,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 208 transitions, 2143 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:41,703 INFO L231 Difference]: Finished difference. Result has 150 places, 191 transitions, 1810 flow [2024-06-21 17:59:41,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1810, PETRI_PLACES=150, PETRI_TRANSITIONS=191} [2024-06-21 17:59:41,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 17:59:41,704 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 191 transitions, 1810 flow [2024-06-21 17:59:41,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:41,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:41,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:59:41,704 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:41,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1171352059, now seen corresponding path program 2 times [2024-06-21 17:59:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636326636] [2024-06-21 17:59:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:42,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636326636] [2024-06-21 17:59:42,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636326636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:42,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:42,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173845333] [2024-06-21 17:59:42,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:42,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:42,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 191 transitions, 1810 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:42,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:42,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:42,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:42,960 INFO L124 PetriNetUnfolderBase]: 1633/2695 cut-off events. [2024-06-21 17:59:42,960 INFO L125 PetriNetUnfolderBase]: For 97930/97930 co-relation queries the response was YES. [2024-06-21 17:59:42,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17404 conditions, 2695 events. 1633/2695 cut-off events. For 97930/97930 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15338 event pairs, 450 based on Foata normal form. 2/2689 useless extension candidates. Maximal degree in co-relation 17335. Up to 2342 conditions per place. [2024-06-21 17:59:42,979 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 168 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-21 17:59:42,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 227 transitions, 2497 flow [2024-06-21 17:59:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 17:59:42,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 17:59:42,980 INFO L175 Difference]: Start difference. First operand has 150 places, 191 transitions, 1810 flow. Second operand 8 states and 157 transitions. [2024-06-21 17:59:42,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 227 transitions, 2497 flow [2024-06-21 17:59:43,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 227 transitions, 2393 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:43,105 INFO L231 Difference]: Finished difference. Result has 155 places, 211 transitions, 2064 flow [2024-06-21 17:59:43,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2064, PETRI_PLACES=155, PETRI_TRANSITIONS=211} [2024-06-21 17:59:43,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 17:59:43,105 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 211 transitions, 2064 flow [2024-06-21 17:59:43,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:43,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:43,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:59:43,106 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:43,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1235225017, now seen corresponding path program 3 times [2024-06-21 17:59:43,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:43,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850601088] [2024-06-21 17:59:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:43,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:43,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850601088] [2024-06-21 17:59:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850601088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:43,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:43,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424700647] [2024-06-21 17:59:43,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:43,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:43,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 211 transitions, 2064 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:43,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:43,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:43,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:44,453 INFO L124 PetriNetUnfolderBase]: 1661/2734 cut-off events. [2024-06-21 17:59:44,453 INFO L125 PetriNetUnfolderBase]: For 103207/103207 co-relation queries the response was YES. [2024-06-21 17:59:44,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18046 conditions, 2734 events. 1661/2734 cut-off events. For 103207/103207 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15406 event pairs, 454 based on Foata normal form. 4/2730 useless extension candidates. Maximal degree in co-relation 17975. Up to 2264 conditions per place. [2024-06-21 17:59:44,475 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 107 changer transitions 0/238 dead transitions. [2024-06-21 17:59:44,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 238 transitions, 2827 flow [2024-06-21 17:59:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 17:59:44,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 17:59:44,476 INFO L175 Difference]: Start difference. First operand has 155 places, 211 transitions, 2064 flow. Second operand 9 states and 181 transitions. [2024-06-21 17:59:44,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 238 transitions, 2827 flow [2024-06-21 17:59:44,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 238 transitions, 2717 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:44,618 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 2386 flow [2024-06-21 17:59:44,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2386, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-21 17:59:44,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 17:59:44,619 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 2386 flow [2024-06-21 17:59:44,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:44,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:44,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:44,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:59:44,619 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)] === [2024-06-21 17:59:44,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1468088804, now seen corresponding path program 1 times [2024-06-21 17:59:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:44,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797672884] [2024-06-21 17:59:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:44,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:45,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797672884] [2024-06-21 17:59:45,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797672884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:45,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:45,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407146146] [2024-06-21 17:59:45,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:45,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:45,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:45,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:45,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:45,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:45,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 2386 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:45,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:45,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:45,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:46,108 INFO L124 PetriNetUnfolderBase]: 1784/2971 cut-off events. [2024-06-21 17:59:46,108 INFO L125 PetriNetUnfolderBase]: For 114630/114632 co-relation queries the response was YES. [2024-06-21 17:59:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19944 conditions, 2971 events. 1784/2971 cut-off events. For 114630/114632 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17319 event pairs, 433 based on Foata normal form. 12/2979 useless extension candidates. Maximal degree in co-relation 19870. Up to 2281 conditions per place. [2024-06-21 17:59:46,132 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 47 changer transitions 0/267 dead transitions. [2024-06-21 17:59:46,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 267 transitions, 3156 flow [2024-06-21 17:59:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 17:59:46,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-21 17:59:46,134 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 2386 flow. Second operand 9 states and 194 transitions. [2024-06-21 17:59:46,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 267 transitions, 3156 flow [2024-06-21 17:59:46,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 267 transitions, 2949 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:46,309 INFO L231 Difference]: Finished difference. Result has 168 places, 230 transitions, 2403 flow [2024-06-21 17:59:46,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=168, PETRI_TRANSITIONS=230} [2024-06-21 17:59:46,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 17:59:46,310 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 230 transitions, 2403 flow [2024-06-21 17:59:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:46,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:46,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:59:46,310 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)] === [2024-06-21 17:59:46,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1176844738, now seen corresponding path program 2 times [2024-06-21 17:59:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358406288] [2024-06-21 17:59:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:47,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358406288] [2024-06-21 17:59:47,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358406288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:47,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:47,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605069680] [2024-06-21 17:59:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:47,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:47,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:47,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:47,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 230 transitions, 2403 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:47,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:47,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:47,914 INFO L124 PetriNetUnfolderBase]: 1894/3181 cut-off events. [2024-06-21 17:59:47,914 INFO L125 PetriNetUnfolderBase]: For 122267/122267 co-relation queries the response was YES. [2024-06-21 17:59:47,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21259 conditions, 3181 events. 1894/3181 cut-off events. For 122267/122267 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19047 event pairs, 469 based on Foata normal form. 12/3183 useless extension candidates. Maximal degree in co-relation 21181. Up to 2554 conditions per place. [2024-06-21 17:59:47,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 49 changer transitions 0/270 dead transitions. [2024-06-21 17:59:47,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 270 transitions, 3152 flow [2024-06-21 17:59:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 17:59:47,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 17:59:47,940 INFO L175 Difference]: Start difference. First operand has 168 places, 230 transitions, 2403 flow. Second operand 9 states and 192 transitions. [2024-06-21 17:59:47,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 270 transitions, 3152 flow [2024-06-21 17:59:48,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 270 transitions, 3056 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:48,142 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 2518 flow [2024-06-21 17:59:48,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-06-21 17:59:48,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 17:59:48,142 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 2518 flow [2024-06-21 17:59:48,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:48,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:48,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:48,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:59:48,143 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)] === [2024-06-21 17:59:48,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1913469920, now seen corresponding path program 3 times [2024-06-21 17:59:48,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182294351] [2024-06-21 17:59:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:48,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:48,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:48,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182294351] [2024-06-21 17:59:48,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182294351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:48,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:48,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886669032] [2024-06-21 17:59:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:49,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:49,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:49,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:49,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:49,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:49,804 INFO L124 PetriNetUnfolderBase]: 1976/3333 cut-off events. [2024-06-21 17:59:49,804 INFO L125 PetriNetUnfolderBase]: For 129780/129780 co-relation queries the response was YES. [2024-06-21 17:59:49,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22252 conditions, 3333 events. 1976/3333 cut-off events. For 129780/129780 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20250 event pairs, 494 based on Foata normal form. 12/3335 useless extension candidates. Maximal degree in co-relation 22171. Up to 2696 conditions per place. [2024-06-21 17:59:49,833 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 53 changer transitions 0/274 dead transitions. [2024-06-21 17:59:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 274 transitions, 3260 flow [2024-06-21 17:59:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 17:59:49,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-21 17:59:49,834 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 2518 flow. Second operand 9 states and 191 transitions. [2024-06-21 17:59:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 274 transitions, 3260 flow [2024-06-21 17:59:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 274 transitions, 3153 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:49,989 INFO L231 Difference]: Finished difference. Result has 181 places, 240 transitions, 2603 flow [2024-06-21 17:59:49,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2603, PETRI_PLACES=181, PETRI_TRANSITIONS=240} [2024-06-21 17:59:49,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 17:59:49,989 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 240 transitions, 2603 flow [2024-06-21 17:59:49,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:49,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:49,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:49,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:59:49,990 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)] === [2024-06-21 17:59:49,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1466029886, now seen corresponding path program 4 times [2024-06-21 17:59:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:49,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41155644] [2024-06-21 17:59:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:50,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:50,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41155644] [2024-06-21 17:59:50,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41155644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:50,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:50,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323317773] [2024-06-21 17:59:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:50,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:50,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 240 transitions, 2603 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:50,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:50,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:50,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:51,539 INFO L124 PetriNetUnfolderBase]: 1956/3301 cut-off events. [2024-06-21 17:59:51,539 INFO L125 PetriNetUnfolderBase]: For 128303/128303 co-relation queries the response was YES. [2024-06-21 17:59:51,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21666 conditions, 3301 events. 1956/3301 cut-off events. For 128303/128303 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20012 event pairs, 430 based on Foata normal form. 12/3303 useless extension candidates. Maximal degree in co-relation 21583. Up to 2104 conditions per place. [2024-06-21 17:59:51,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 63 changer transitions 0/274 dead transitions. [2024-06-21 17:59:51,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 274 transitions, 3233 flow [2024-06-21 17:59:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 17:59:51,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-21 17:59:51,568 INFO L175 Difference]: Start difference. First operand has 181 places, 240 transitions, 2603 flow. Second operand 9 states and 190 transitions. [2024-06-21 17:59:51,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 274 transitions, 3233 flow [2024-06-21 17:59:51,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 274 transitions, 3130 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:51,723 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 2586 flow [2024-06-21 17:59:51,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2586, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-21 17:59:51,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 17:59:51,724 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 2586 flow [2024-06-21 17:59:51,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:51,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:51,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:51,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:59:51,724 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:51,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2076773501, now seen corresponding path program 1 times [2024-06-21 17:59:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077918435] [2024-06-21 17:59:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:52,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:52,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077918435] [2024-06-21 17:59:52,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077918435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:52,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:52,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781654081] [2024-06-21 17:59:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:52,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:52,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 2586 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:52,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:52,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:52,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:53,048 INFO L124 PetriNetUnfolderBase]: 1897/3232 cut-off events. [2024-06-21 17:59:53,048 INFO L125 PetriNetUnfolderBase]: For 137672/137702 co-relation queries the response was YES. [2024-06-21 17:59:53,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21666 conditions, 3232 events. 1897/3232 cut-off events. For 137672/137702 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19865 event pairs, 471 based on Foata normal form. 17/3212 useless extension candidates. Maximal degree in co-relation 21582. Up to 2611 conditions per place. [2024-06-21 17:59:53,075 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 174 selfloop transitions, 43 changer transitions 0/260 dead transitions. [2024-06-21 17:59:53,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 260 transitions, 3224 flow [2024-06-21 17:59:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 17:59:53,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 17:59:53,076 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 2586 flow. Second operand 8 states and 163 transitions. [2024-06-21 17:59:53,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 260 transitions, 3224 flow [2024-06-21 17:59:53,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 260 transitions, 3055 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:53,279 INFO L231 Difference]: Finished difference. Result has 185 places, 241 transitions, 2545 flow [2024-06-21 17:59:53,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2545, PETRI_PLACES=185, PETRI_TRANSITIONS=241} [2024-06-21 17:59:53,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 17:59:53,280 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 241 transitions, 2545 flow [2024-06-21 17:59:53,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:53,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:53,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:59:53,280 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:53,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2077308251, now seen corresponding path program 2 times [2024-06-21 17:59:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385664067] [2024-06-21 17:59:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:54,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:54,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385664067] [2024-06-21 17:59:54,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385664067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:54,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:54,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699455245] [2024-06-21 17:59:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:54,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:54,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 241 transitions, 2545 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:54,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:54,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:54,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:54,570 INFO L124 PetriNetUnfolderBase]: 1940/3292 cut-off events. [2024-06-21 17:59:54,570 INFO L125 PetriNetUnfolderBase]: For 143965/143995 co-relation queries the response was YES. [2024-06-21 17:59:54,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21795 conditions, 3292 events. 1940/3292 cut-off events. For 143965/143995 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20238 event pairs, 477 based on Foata normal form. 18/3272 useless extension candidates. Maximal degree in co-relation 21711. Up to 2763 conditions per place. [2024-06-21 17:59:54,599 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 44 changer transitions 0/260 dead transitions. [2024-06-21 17:59:54,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 260 transitions, 3077 flow [2024-06-21 17:59:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 17:59:54,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 17:59:54,602 INFO L175 Difference]: Start difference. First operand has 185 places, 241 transitions, 2545 flow. Second operand 8 states and 160 transitions. [2024-06-21 17:59:54,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 260 transitions, 3077 flow [2024-06-21 17:59:54,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 260 transitions, 3017 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:54,800 INFO L231 Difference]: Finished difference. Result has 189 places, 245 transitions, 2618 flow [2024-06-21 17:59:54,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2618, PETRI_PLACES=189, PETRI_TRANSITIONS=245} [2024-06-21 17:59:54,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 17:59:54,800 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 245 transitions, 2618 flow [2024-06-21 17:59:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:54,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:54,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:59:54,801 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:54,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash -378598523, now seen corresponding path program 3 times [2024-06-21 17:59:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436572229] [2024-06-21 17:59:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436572229] [2024-06-21 17:59:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436572229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:55,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848621898] [2024-06-21 17:59:55,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:55,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 17:59:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 245 transitions, 2618 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 17:59:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:56,209 INFO L124 PetriNetUnfolderBase]: 1917/3259 cut-off events. [2024-06-21 17:59:56,209 INFO L125 PetriNetUnfolderBase]: For 139928/139949 co-relation queries the response was YES. [2024-06-21 17:59:56,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21368 conditions, 3259 events. 1917/3259 cut-off events. For 139928/139949 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20022 event pairs, 468 based on Foata normal form. 13/3234 useless extension candidates. Maximal degree in co-relation 21282. Up to 2738 conditions per place. [2024-06-21 17:59:56,237 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-21 17:59:56,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 260 transitions, 3112 flow [2024-06-21 17:59:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 17:59:56,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 17:59:56,239 INFO L175 Difference]: Start difference. First operand has 189 places, 245 transitions, 2618 flow. Second operand 8 states and 160 transitions. [2024-06-21 17:59:56,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 260 transitions, 3112 flow [2024-06-21 17:59:56,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 3030 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:56,535 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 2619 flow [2024-06-21 17:59:56,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2619, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-21 17:59:56,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 17:59:56,536 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 2619 flow [2024-06-21 17:59:56,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:56,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:56,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:56,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:59:56,536 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:56,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -823513181, now seen corresponding path program 1 times [2024-06-21 17:59:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:56,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962944266] [2024-06-21 17:59:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962944266] [2024-06-21 17:59:57,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962944266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:57,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:57,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820530705] [2024-06-21 17:59:57,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:57,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:57,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:57,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 2619 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:57,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:57,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:57,937 INFO L124 PetriNetUnfolderBase]: 2044/3444 cut-off events. [2024-06-21 17:59:57,937 INFO L125 PetriNetUnfolderBase]: For 136024/136024 co-relation queries the response was YES. [2024-06-21 17:59:57,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22345 conditions, 3444 events. 2044/3444 cut-off events. For 136024/136024 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21071 event pairs, 493 based on Foata normal form. 2/3440 useless extension candidates. Maximal degree in co-relation 22258. Up to 3061 conditions per place. [2024-06-21 17:59:57,967 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 38 changer transitions 0/273 dead transitions. [2024-06-21 17:59:57,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 273 transitions, 3445 flow [2024-06-21 17:59:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 17:59:57,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 17:59:57,968 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 2619 flow. Second operand 8 states and 160 transitions. [2024-06-21 17:59:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 273 transitions, 3445 flow [2024-06-21 17:59:58,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 273 transitions, 3338 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:58,164 INFO L231 Difference]: Finished difference. Result has 194 places, 253 transitions, 2755 flow [2024-06-21 17:59:58,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2755, PETRI_PLACES=194, PETRI_TRANSITIONS=253} [2024-06-21 17:59:58,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 17:59:58,164 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 253 transitions, 2755 flow [2024-06-21 17:59:58,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:58,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:58,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:58,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:59:58,165 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:58,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1653886073, now seen corresponding path program 1 times [2024-06-21 17:59:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:58,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045126935] [2024-06-21 17:59:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:58,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045126935] [2024-06-21 17:59:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045126935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:58,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912540223] [2024-06-21 17:59:58,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:58,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:58,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:59,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 17:59:59,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 253 transitions, 2755 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:59,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:59,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 17:59:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:59,633 INFO L124 PetriNetUnfolderBase]: 2060/3476 cut-off events. [2024-06-21 17:59:59,633 INFO L125 PetriNetUnfolderBase]: For 146114/146114 co-relation queries the response was YES. [2024-06-21 17:59:59,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23002 conditions, 3476 events. 2060/3476 cut-off events. For 146114/146114 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21383 event pairs, 496 based on Foata normal form. 4/3474 useless extension candidates. Maximal degree in co-relation 22913. Up to 3102 conditions per place. [2024-06-21 17:59:59,665 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 231 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-21 17:59:59,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 275 transitions, 3420 flow [2024-06-21 17:59:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:59:59,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 17:59:59,666 INFO L175 Difference]: Start difference. First operand has 194 places, 253 transitions, 2755 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:59:59,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 275 transitions, 3420 flow [2024-06-21 17:59:59,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 275 transitions, 3293 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:59,956 INFO L231 Difference]: Finished difference. Result has 199 places, 256 transitions, 2782 flow [2024-06-21 17:59:59,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2782, PETRI_PLACES=199, PETRI_TRANSITIONS=256} [2024-06-21 17:59:59,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 17:59:59,957 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 256 transitions, 2782 flow [2024-06-21 17:59:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:59,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:59,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:59,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:59:59,957 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:59,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2077083687, now seen corresponding path program 2 times [2024-06-21 17:59:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:59,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571454183] [2024-06-21 17:59:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:00,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:00,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571454183] [2024-06-21 18:00:00,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571454183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:00,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:00,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505382384] [2024-06-21 18:00:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:00,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:00,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:00,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:00,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 256 transitions, 2782 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:00,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:00,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:00,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:01,480 INFO L124 PetriNetUnfolderBase]: 2089/3520 cut-off events. [2024-06-21 18:00:01,480 INFO L125 PetriNetUnfolderBase]: For 156239/156239 co-relation queries the response was YES. [2024-06-21 18:00:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23723 conditions, 3520 events. 2089/3520 cut-off events. For 156239/156239 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21690 event pairs, 494 based on Foata normal form. 4/3516 useless extension candidates. Maximal degree in co-relation 23632. Up to 3010 conditions per place. [2024-06-21 18:00:01,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 200 selfloop transitions, 81 changer transitions 0/288 dead transitions. [2024-06-21 18:00:01,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 288 transitions, 3708 flow [2024-06-21 18:00:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:00:01,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 18:00:01,520 INFO L175 Difference]: Start difference. First operand has 199 places, 256 transitions, 2782 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:00:01,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 288 transitions, 3708 flow [2024-06-21 18:00:01,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 288 transitions, 3576 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:01,800 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 3098 flow [2024-06-21 18:00:01,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3098, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-06-21 18:00:01,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 18:00:01,801 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 3098 flow [2024-06-21 18:00:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:01,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:01,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:01,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:00:01,801 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:01,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2077092987, now seen corresponding path program 3 times [2024-06-21 18:00:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:01,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732100799] [2024-06-21 18:00:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:01,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:02,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732100799] [2024-06-21 18:00:02,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732100799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:02,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:02,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:02,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988952591] [2024-06-21 18:00:02,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:02,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:02,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:02,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:02,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 3098 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:02,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:02,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:02,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:03,306 INFO L124 PetriNetUnfolderBase]: 2115/3554 cut-off events. [2024-06-21 18:00:03,306 INFO L125 PetriNetUnfolderBase]: For 164876/164876 co-relation queries the response was YES. [2024-06-21 18:00:03,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24549 conditions, 3554 events. 2115/3554 cut-off events. For 164876/164876 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21873 event pairs, 507 based on Foata normal form. 4/3550 useless extension candidates. Maximal degree in co-relation 24454. Up to 3096 conditions per place. [2024-06-21 18:00:03,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 78 changer transitions 0/293 dead transitions. [2024-06-21 18:00:03,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 293 transitions, 3844 flow [2024-06-21 18:00:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:00:03,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 18:00:03,342 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 3098 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:00:03,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 293 transitions, 3844 flow [2024-06-21 18:00:03,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 293 transitions, 3709 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-21 18:00:03,630 INFO L231 Difference]: Finished difference. Result has 211 places, 276 transitions, 3247 flow [2024-06-21 18:00:03,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3247, PETRI_PLACES=211, PETRI_TRANSITIONS=276} [2024-06-21 18:00:03,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 18:00:03,631 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 276 transitions, 3247 flow [2024-06-21 18:00:03,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:03,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:03,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:00:03,632 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:03,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash -371925339, now seen corresponding path program 4 times [2024-06-21 18:00:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035112599] [2024-06-21 18:00:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:04,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035112599] [2024-06-21 18:00:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035112599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:04,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:04,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684515755] [2024-06-21 18:00:04,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:04,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:04,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 276 transitions, 3247 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:04,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:04,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:04,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:05,551 INFO L124 PetriNetUnfolderBase]: 2203/3686 cut-off events. [2024-06-21 18:00:05,551 INFO L125 PetriNetUnfolderBase]: For 199544/199544 co-relation queries the response was YES. [2024-06-21 18:00:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25781 conditions, 3686 events. 2203/3686 cut-off events. For 199544/199544 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22671 event pairs, 518 based on Foata normal form. 24/3702 useless extension candidates. Maximal degree in co-relation 25684. Up to 3089 conditions per place. [2024-06-21 18:00:05,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 101 changer transitions 0/300 dead transitions. [2024-06-21 18:00:05,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 300 transitions, 4054 flow [2024-06-21 18:00:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:00:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 18:00:05,593 INFO L175 Difference]: Start difference. First operand has 211 places, 276 transitions, 3247 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:00:05,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 300 transitions, 4054 flow [2024-06-21 18:00:05,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 300 transitions, 3856 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:05,901 INFO L231 Difference]: Finished difference. Result has 214 places, 281 transitions, 3405 flow [2024-06-21 18:00:05,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3405, PETRI_PLACES=214, PETRI_TRANSITIONS=281} [2024-06-21 18:00:05,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 18:00:05,902 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 281 transitions, 3405 flow [2024-06-21 18:00:05,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:05,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:05,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:00:05,903 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:05,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1952177029, now seen corresponding path program 5 times [2024-06-21 18:00:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:05,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726540163] [2024-06-21 18:00:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:05,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:06,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:06,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726540163] [2024-06-21 18:00:06,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726540163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:06,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:06,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:06,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080783983] [2024-06-21 18:00:06,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:06,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:07,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:07,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 281 transitions, 3405 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:07,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:07,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:07,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:07,919 INFO L124 PetriNetUnfolderBase]: 2275/3798 cut-off events. [2024-06-21 18:00:07,919 INFO L125 PetriNetUnfolderBase]: For 209023/209023 co-relation queries the response was YES. [2024-06-21 18:00:07,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26868 conditions, 3798 events. 2275/3798 cut-off events. For 209023/209023 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23344 event pairs, 524 based on Foata normal form. 26/3816 useless extension candidates. Maximal degree in co-relation 26770. Up to 3201 conditions per place. [2024-06-21 18:00:07,969 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 88 changer transitions 0/307 dead transitions. [2024-06-21 18:00:07,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 307 transitions, 4262 flow [2024-06-21 18:00:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:00:07,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 18:00:07,971 INFO L175 Difference]: Start difference. First operand has 214 places, 281 transitions, 3405 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:00:07,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 307 transitions, 4262 flow [2024-06-21 18:00:08,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 307 transitions, 3926 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:08,315 INFO L231 Difference]: Finished difference. Result has 217 places, 288 transitions, 3451 flow [2024-06-21 18:00:08,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3451, PETRI_PLACES=217, PETRI_TRANSITIONS=288} [2024-06-21 18:00:08,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 18:00:08,316 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 288 transitions, 3451 flow [2024-06-21 18:00:08,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:08,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:08,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:08,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:00:08,316 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:08,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1843534768, now seen corresponding path program 1 times [2024-06-21 18:00:08,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:08,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588300891] [2024-06-21 18:00:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:08,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:08,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588300891] [2024-06-21 18:00:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588300891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:08,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:08,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760992074] [2024-06-21 18:00:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:08,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:08,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 288 transitions, 3451 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:08,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:10,011 INFO L124 PetriNetUnfolderBase]: 2285/3830 cut-off events. [2024-06-21 18:00:10,011 INFO L125 PetriNetUnfolderBase]: For 185922/185922 co-relation queries the response was YES. [2024-06-21 18:00:10,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3830 events. 2285/3830 cut-off events. For 185922/185922 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23630 event pairs, 506 based on Foata normal form. 2/3830 useless extension candidates. Maximal degree in co-relation 26793. Up to 3474 conditions per place. [2024-06-21 18:00:10,078 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 290 selfloop transitions, 22 changer transitions 0/319 dead transitions. [2024-06-21 18:00:10,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 319 transitions, 4235 flow [2024-06-21 18:00:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:00:10,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 18:00:10,080 INFO L175 Difference]: Start difference. First operand has 217 places, 288 transitions, 3451 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:00:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 319 transitions, 4235 flow [2024-06-21 18:00:10,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 319 transitions, 3978 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:10,545 INFO L231 Difference]: Finished difference. Result has 220 places, 292 transitions, 3319 flow [2024-06-21 18:00:10,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=220, PETRI_TRANSITIONS=292} [2024-06-21 18:00:10,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 18:00:10,546 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 292 transitions, 3319 flow [2024-06-21 18:00:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:10,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:10,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:10,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:00:10,546 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:10,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash 337394554, now seen corresponding path program 2 times [2024-06-21 18:00:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:10,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320083075] [2024-06-21 18:00:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:10,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:11,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:11,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320083075] [2024-06-21 18:00:11,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320083075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:11,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:11,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:11,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478680299] [2024-06-21 18:00:11,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:11,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:11,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:11,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 292 transitions, 3319 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:11,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:11,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:11,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:12,237 INFO L124 PetriNetUnfolderBase]: 2305/3864 cut-off events. [2024-06-21 18:00:12,237 INFO L125 PetriNetUnfolderBase]: For 186878/186878 co-relation queries the response was YES. [2024-06-21 18:00:12,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27016 conditions, 3864 events. 2305/3864 cut-off events. For 186878/186878 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23886 event pairs, 506 based on Foata normal form. 2/3864 useless extension candidates. Maximal degree in co-relation 26914. Up to 3488 conditions per place. [2024-06-21 18:00:12,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 31 changer transitions 0/330 dead transitions. [2024-06-21 18:00:12,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 330 transitions, 4201 flow [2024-06-21 18:00:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:00:12,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 18:00:12,298 INFO L175 Difference]: Start difference. First operand has 220 places, 292 transitions, 3319 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:00:12,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 330 transitions, 4201 flow [2024-06-21 18:00:12,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 330 transitions, 4116 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:12,777 INFO L231 Difference]: Finished difference. Result has 225 places, 301 transitions, 3453 flow [2024-06-21 18:00:12,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3453, PETRI_PLACES=225, PETRI_TRANSITIONS=301} [2024-06-21 18:00:12,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 18:00:12,778 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 301 transitions, 3453 flow [2024-06-21 18:00:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:12,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:12,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:12,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:00:12,778 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:12,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1409663080, now seen corresponding path program 3 times [2024-06-21 18:00:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:12,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725371295] [2024-06-21 18:00:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725371295] [2024-06-21 18:00:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725371295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:13,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:13,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:13,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713346063] [2024-06-21 18:00:13,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:13,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:13,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:13,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:13,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 301 transitions, 3453 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:13,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:13,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:13,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:14,428 INFO L124 PetriNetUnfolderBase]: 2315/3875 cut-off events. [2024-06-21 18:00:14,428 INFO L125 PetriNetUnfolderBase]: For 195032/195034 co-relation queries the response was YES. [2024-06-21 18:00:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27617 conditions, 3875 events. 2315/3875 cut-off events. For 195032/195034 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23974 event pairs, 516 based on Foata normal form. 2/3874 useless extension candidates. Maximal degree in co-relation 27513. Up to 3466 conditions per place. [2024-06-21 18:00:14,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 34 changer transitions 0/327 dead transitions. [2024-06-21 18:00:14,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 4239 flow [2024-06-21 18:00:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 18:00:14,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 18:00:14,475 INFO L175 Difference]: Start difference. First operand has 225 places, 301 transitions, 3453 flow. Second operand 8 states and 164 transitions. [2024-06-21 18:00:14,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 4239 flow [2024-06-21 18:00:14,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 327 transitions, 4134 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:14,932 INFO L231 Difference]: Finished difference. Result has 227 places, 304 transitions, 3492 flow [2024-06-21 18:00:14,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=227, PETRI_TRANSITIONS=304} [2024-06-21 18:00:14,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 18:00:14,933 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 304 transitions, 3492 flow [2024-06-21 18:00:14,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:14,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:14,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:00:14,933 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:14,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1398235240, now seen corresponding path program 4 times [2024-06-21 18:00:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:14,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883575475] [2024-06-21 18:00:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:14,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:15,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:15,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883575475] [2024-06-21 18:00:15,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883575475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:15,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:15,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:15,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006493825] [2024-06-21 18:00:15,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:15,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:15,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:15,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 304 transitions, 3492 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:15,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:15,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:15,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:16,609 INFO L124 PetriNetUnfolderBase]: 2325/3895 cut-off events. [2024-06-21 18:00:16,609 INFO L125 PetriNetUnfolderBase]: For 203357/203359 co-relation queries the response was YES. [2024-06-21 18:00:16,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28184 conditions, 3895 events. 2325/3895 cut-off events. For 203357/203359 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24123 event pairs, 516 based on Foata normal form. 2/3894 useless extension candidates. Maximal degree in co-relation 28079. Up to 3460 conditions per place. [2024-06-21 18:00:16,659 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 44 changer transitions 0/329 dead transitions. [2024-06-21 18:00:16,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 329 transitions, 4303 flow [2024-06-21 18:00:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:00:16,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 18:00:16,660 INFO L175 Difference]: Start difference. First operand has 227 places, 304 transitions, 3492 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:00:16,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 329 transitions, 4303 flow [2024-06-21 18:00:17,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4179 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:17,100 INFO L231 Difference]: Finished difference. Result has 229 places, 307 transitions, 3539 flow [2024-06-21 18:00:17,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3539, PETRI_PLACES=229, PETRI_TRANSITIONS=307} [2024-06-21 18:00:17,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 18:00:17,100 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 307 transitions, 3539 flow [2024-06-21 18:00:17,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:17,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:17,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:17,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:00:17,101 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1225922980, now seen corresponding path program 5 times [2024-06-21 18:00:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91447179] [2024-06-21 18:00:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:17,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91447179] [2024-06-21 18:00:17,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91447179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:17,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:17,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:17,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985754846] [2024-06-21 18:00:17,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:17,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:17,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:18,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:18,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 307 transitions, 3539 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:18,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:18,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:18,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:18,960 INFO L124 PetriNetUnfolderBase]: 2335/3914 cut-off events. [2024-06-21 18:00:18,960 INFO L125 PetriNetUnfolderBase]: For 212009/212011 co-relation queries the response was YES. [2024-06-21 18:00:18,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28731 conditions, 3914 events. 2335/3914 cut-off events. For 212009/212011 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24308 event pairs, 512 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 28626. Up to 3538 conditions per place. [2024-06-21 18:00:19,009 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-21 18:00:19,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 4317 flow [2024-06-21 18:00:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:00:19,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:00:19,011 INFO L175 Difference]: Start difference. First operand has 229 places, 307 transitions, 3539 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:00:19,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 4317 flow [2024-06-21 18:00:19,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4170 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:19,376 INFO L231 Difference]: Finished difference. Result has 231 places, 310 transitions, 3551 flow [2024-06-21 18:00:19,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3551, PETRI_PLACES=231, PETRI_TRANSITIONS=310} [2024-06-21 18:00:19,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 18:00:19,377 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 310 transitions, 3551 flow [2024-06-21 18:00:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:19,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:00:19,377 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:19,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash 713054104, now seen corresponding path program 6 times [2024-06-21 18:00:19,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:19,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828640117] [2024-06-21 18:00:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:19,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:20,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:20,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828640117] [2024-06-21 18:00:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828640117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:20,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085552832] [2024-06-21 18:00:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:20,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:20,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:20,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 310 transitions, 3551 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:20,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:20,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:20,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:21,047 INFO L124 PetriNetUnfolderBase]: 2361/3957 cut-off events. [2024-06-21 18:00:21,047 INFO L125 PetriNetUnfolderBase]: For 225212/225214 co-relation queries the response was YES. [2024-06-21 18:00:21,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29602 conditions, 3957 events. 2361/3957 cut-off events. For 225212/225214 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24657 event pairs, 517 based on Foata normal form. 2/3956 useless extension candidates. Maximal degree in co-relation 29496. Up to 3441 conditions per place. [2024-06-21 18:00:21,093 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 74 changer transitions 0/338 dead transitions. [2024-06-21 18:00:21,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 338 transitions, 4607 flow [2024-06-21 18:00:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:00:21,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 18:00:21,095 INFO L175 Difference]: Start difference. First operand has 231 places, 310 transitions, 3551 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:00:21,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 338 transitions, 4607 flow [2024-06-21 18:00:21,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 338 transitions, 4440 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:21,576 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3709 flow [2024-06-21 18:00:21,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3709, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-21 18:00:21,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 18:00:21,577 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3709 flow [2024-06-21 18:00:21,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:21,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:21,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:21,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:00:21,577 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:21,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1693453320, now seen corresponding path program 1 times [2024-06-21 18:00:21,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117697386] [2024-06-21 18:00:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:21,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117697386] [2024-06-21 18:00:22,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117697386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:22,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:22,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964768492] [2024-06-21 18:00:22,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:22,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:22,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:22,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3709 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:22,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:22,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:22,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:23,148 INFO L124 PetriNetUnfolderBase]: 2369/3972 cut-off events. [2024-06-21 18:00:23,148 INFO L125 PetriNetUnfolderBase]: For 235617/235617 co-relation queries the response was YES. [2024-06-21 18:00:23,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30171 conditions, 3972 events. 2369/3972 cut-off events. For 235617/235617 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24665 event pairs, 411 based on Foata normal form. 2/3972 useless extension candidates. Maximal degree in co-relation 30065. Up to 3568 conditions per place. [2024-06-21 18:00:23,199 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 20 changer transitions 0/346 dead transitions. [2024-06-21 18:00:23,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 346 transitions, 4521 flow [2024-06-21 18:00:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 18:00:23,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 18:00:23,201 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3709 flow. Second operand 8 states and 162 transitions. [2024-06-21 18:00:23,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 346 transitions, 4521 flow [2024-06-21 18:00:23,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4389 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:23,593 INFO L231 Difference]: Finished difference. Result has 237 places, 318 transitions, 3674 flow [2024-06-21 18:00:23,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3674, PETRI_PLACES=237, PETRI_TRANSITIONS=318} [2024-06-21 18:00:23,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 18:00:23,594 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 318 transitions, 3674 flow [2024-06-21 18:00:23,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:23,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:23,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:23,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:00:23,594 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:23,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash 337391578, now seen corresponding path program 2 times [2024-06-21 18:00:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:23,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411219409] [2024-06-21 18:00:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:23,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:24,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:24,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411219409] [2024-06-21 18:00:24,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411219409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:24,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:24,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16772890] [2024-06-21 18:00:24,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:24,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:24,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:24,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:24,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:24,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 318 transitions, 3674 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:24,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:24,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:24,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:25,264 INFO L124 PetriNetUnfolderBase]: 2377/3984 cut-off events. [2024-06-21 18:00:25,265 INFO L125 PetriNetUnfolderBase]: For 240948/240948 co-relation queries the response was YES. [2024-06-21 18:00:25,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30415 conditions, 3984 events. 2377/3984 cut-off events. For 240948/240948 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24750 event pairs, 505 based on Foata normal form. 2/3984 useless extension candidates. Maximal degree in co-relation 30307. Up to 3610 conditions per place. [2024-06-21 18:00:25,312 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 24 changer transitions 0/344 dead transitions. [2024-06-21 18:00:25,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 344 transitions, 4474 flow [2024-06-21 18:00:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:00:25,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 18:00:25,314 INFO L175 Difference]: Start difference. First operand has 237 places, 318 transitions, 3674 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:00:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 344 transitions, 4474 flow [2024-06-21 18:00:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 344 transitions, 4393 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:25,752 INFO L231 Difference]: Finished difference. Result has 239 places, 320 transitions, 3703 flow [2024-06-21 18:00:25,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3703, PETRI_PLACES=239, PETRI_TRANSITIONS=320} [2024-06-21 18:00:25,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 18:00:25,753 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 320 transitions, 3703 flow [2024-06-21 18:00:25,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:25,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:25,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:00:25,754 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:25,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash 778274522, now seen corresponding path program 3 times [2024-06-21 18:00:25,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:25,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549903057] [2024-06-21 18:00:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:26,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:26,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549903057] [2024-06-21 18:00:26,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549903057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:26,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52174571] [2024-06-21 18:00:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:26,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:26,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 320 transitions, 3703 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:26,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:26,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:26,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:27,343 INFO L124 PetriNetUnfolderBase]: 2385/3992 cut-off events. [2024-06-21 18:00:27,343 INFO L125 PetriNetUnfolderBase]: For 248588/248590 co-relation queries the response was YES. [2024-06-21 18:00:27,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30651 conditions, 3992 events. 2385/3992 cut-off events. For 248588/248590 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24824 event pairs, 511 based on Foata normal form. 2/3992 useless extension candidates. Maximal degree in co-relation 30542. Up to 3610 conditions per place. [2024-06-21 18:00:27,386 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 298 selfloop transitions, 34 changer transitions 0/339 dead transitions. [2024-06-21 18:00:27,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 4471 flow [2024-06-21 18:00:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:00:27,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:00:27,388 INFO L175 Difference]: Start difference. First operand has 239 places, 320 transitions, 3703 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:00:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 4471 flow [2024-06-21 18:00:27,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 339 transitions, 4375 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:27,861 INFO L231 Difference]: Finished difference. Result has 241 places, 322 transitions, 3741 flow [2024-06-21 18:00:27,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3741, PETRI_PLACES=241, PETRI_TRANSITIONS=322} [2024-06-21 18:00:27,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 18:00:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 322 transitions, 3741 flow [2024-06-21 18:00:27,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:27,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:27,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:00:27,863 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:27,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1402989896, now seen corresponding path program 1 times [2024-06-21 18:00:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:27,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649081188] [2024-06-21 18:00:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:27,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:28,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:28,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649081188] [2024-06-21 18:00:28,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649081188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:28,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:28,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177324411] [2024-06-21 18:00:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:28,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:28,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 322 transitions, 3741 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:28,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:28,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:28,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:29,537 INFO L124 PetriNetUnfolderBase]: 2390/3997 cut-off events. [2024-06-21 18:00:29,537 INFO L125 PetriNetUnfolderBase]: For 252593/252593 co-relation queries the response was YES. [2024-06-21 18:00:29,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30819 conditions, 3997 events. 2390/3997 cut-off events. For 252593/252593 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24815 event pairs, 512 based on Foata normal form. 1/3994 useless extension candidates. Maximal degree in co-relation 30709. Up to 3598 conditions per place. [2024-06-21 18:00:29,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 31 changer transitions 0/349 dead transitions. [2024-06-21 18:00:29,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 349 transitions, 4547 flow [2024-06-21 18:00:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:00:29,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 18:00:29,587 INFO L175 Difference]: Start difference. First operand has 241 places, 322 transitions, 3741 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:00:29,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 349 transitions, 4547 flow [2024-06-21 18:00:30,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 349 transitions, 4431 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:30,076 INFO L231 Difference]: Finished difference. Result has 243 places, 325 transitions, 3745 flow [2024-06-21 18:00:30,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3745, PETRI_PLACES=243, PETRI_TRANSITIONS=325} [2024-06-21 18:00:30,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 18:00:30,077 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 325 transitions, 3745 flow [2024-06-21 18:00:30,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:30,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:30,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:00:30,078 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:30,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1110598274, now seen corresponding path program 7 times [2024-06-21 18:00:30,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:30,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422035627] [2024-06-21 18:00:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:30,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422035627] [2024-06-21 18:00:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422035627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:30,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287239833] [2024-06-21 18:00:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:30,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:30,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 325 transitions, 3745 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:30,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:30,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:30,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:31,438 INFO L124 PetriNetUnfolderBase]: 2400/4011 cut-off events. [2024-06-21 18:00:31,439 INFO L125 PetriNetUnfolderBase]: For 261276/261276 co-relation queries the response was YES. [2024-06-21 18:00:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 4011 events. 2400/4011 cut-off events. For 261276/261276 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24997 event pairs, 519 based on Foata normal form. 2/4003 useless extension candidates. Maximal degree in co-relation 30912. Up to 3587 conditions per place. [2024-06-21 18:00:31,478 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 34 changer transitions 0/349 dead transitions. [2024-06-21 18:00:31,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 349 transitions, 4583 flow [2024-06-21 18:00:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:00:31,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 18:00:31,480 INFO L175 Difference]: Start difference. First operand has 243 places, 325 transitions, 3745 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:00:31,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 349 transitions, 4583 flow [2024-06-21 18:00:31,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 349 transitions, 4495 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:31,940 INFO L231 Difference]: Finished difference. Result has 245 places, 328 transitions, 3815 flow [2024-06-21 18:00:31,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3815, PETRI_PLACES=245, PETRI_TRANSITIONS=328} [2024-06-21 18:00:31,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 18:00:31,941 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 328 transitions, 3815 flow [2024-06-21 18:00:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:31,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:31,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:31,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:00:31,942 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:31,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash -25091234, now seen corresponding path program 8 times [2024-06-21 18:00:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880274125] [2024-06-21 18:00:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:32,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:32,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880274125] [2024-06-21 18:00:32,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880274125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:32,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:32,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619346867] [2024-06-21 18:00:32,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:32,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:32,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:32,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 328 transitions, 3815 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:32,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:32,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:32,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:33,431 INFO L124 PetriNetUnfolderBase]: 2394/4003 cut-off events. [2024-06-21 18:00:33,431 INFO L125 PetriNetUnfolderBase]: For 263971/263971 co-relation queries the response was YES. [2024-06-21 18:00:33,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30917 conditions, 4003 events. 2394/4003 cut-off events. For 263971/263971 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24935 event pairs, 519 based on Foata normal form. 2/3995 useless extension candidates. Maximal degree in co-relation 30805. Up to 3565 conditions per place. [2024-06-21 18:00:33,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 41 changer transitions 0/348 dead transitions. [2024-06-21 18:00:33,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 348 transitions, 4588 flow [2024-06-21 18:00:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:00:33,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 18:00:33,474 INFO L175 Difference]: Start difference. First operand has 245 places, 328 transitions, 3815 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:00:33,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 348 transitions, 4588 flow [2024-06-21 18:00:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 4361 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-21 18:00:34,076 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 3677 flow [2024-06-21 18:00:34,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3677, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-21 18:00:34,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 18:00:34,077 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 3677 flow [2024-06-21 18:00:34,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:34,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:34,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:34,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:00:34,078 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:34,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash 253872024, now seen corresponding path program 9 times [2024-06-21 18:00:34,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:34,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991952307] [2024-06-21 18:00:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:34,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:34,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991952307] [2024-06-21 18:00:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991952307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:34,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662922468] [2024-06-21 18:00:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:34,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:34,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 3677 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:34,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:34,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:34,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:35,875 INFO L124 PetriNetUnfolderBase]: 2430/4063 cut-off events. [2024-06-21 18:00:35,875 INFO L125 PetriNetUnfolderBase]: For 279553/279553 co-relation queries the response was YES. [2024-06-21 18:00:35,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31460 conditions, 4063 events. 2430/4063 cut-off events. For 279553/279553 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25409 event pairs, 519 based on Foata normal form. 4/4057 useless extension candidates. Maximal degree in co-relation 31348. Up to 3492 conditions per place. [2024-06-21 18:00:36,049 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 62 changer transitions 0/353 dead transitions. [2024-06-21 18:00:36,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 353 transitions, 4754 flow [2024-06-21 18:00:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:00:36,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 18:00:36,050 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 3677 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:00:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 353 transitions, 4754 flow [2024-06-21 18:00:36,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 353 transitions, 4527 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 18:00:36,634 INFO L231 Difference]: Finished difference. Result has 243 places, 335 transitions, 3770 flow [2024-06-21 18:00:36,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=243, PETRI_TRANSITIONS=335} [2024-06-21 18:00:36,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 18:00:36,634 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 335 transitions, 3770 flow [2024-06-21 18:00:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:36,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:36,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:36,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:00:36,635 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:36,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029860, now seen corresponding path program 10 times [2024-06-21 18:00:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:36,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675838861] [2024-06-21 18:00:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675838861] [2024-06-21 18:00:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675838861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:37,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427035498] [2024-06-21 18:00:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:37,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:37,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:37,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 335 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:37,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:37,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:37,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:38,318 INFO L124 PetriNetUnfolderBase]: 2466/4110 cut-off events. [2024-06-21 18:00:38,318 INFO L125 PetriNetUnfolderBase]: For 296763/296763 co-relation queries the response was YES. [2024-06-21 18:00:38,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32323 conditions, 4110 events. 2466/4110 cut-off events. For 296763/296763 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25790 event pairs, 546 based on Foata normal form. 4/4101 useless extension candidates. Maximal degree in co-relation 32212. Up to 3306 conditions per place. [2024-06-21 18:00:38,373 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 247 selfloop transitions, 106 changer transitions 0/360 dead transitions. [2024-06-21 18:00:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 360 transitions, 5040 flow [2024-06-21 18:00:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 18:00:38,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 18:00:38,374 INFO L175 Difference]: Start difference. First operand has 243 places, 335 transitions, 3770 flow. Second operand 8 states and 165 transitions. [2024-06-21 18:00:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 360 transitions, 5040 flow [2024-06-21 18:00:39,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 360 transitions, 4887 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:39,147 INFO L231 Difference]: Finished difference. Result has 247 places, 342 transitions, 4029 flow [2024-06-21 18:00:39,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4029, PETRI_PLACES=247, PETRI_TRANSITIONS=342} [2024-06-21 18:00:39,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 18:00:39,148 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 342 transitions, 4029 flow [2024-06-21 18:00:39,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:39,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:39,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:39,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:00:39,149 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:39,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:39,149 INFO L85 PathProgramCache]: Analyzing trace with hash 101057826, now seen corresponding path program 11 times [2024-06-21 18:00:39,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:39,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437213189] [2024-06-21 18:00:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:39,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:39,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437213189] [2024-06-21 18:00:39,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437213189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:39,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:39,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:39,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292995801] [2024-06-21 18:00:39,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:39,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:40,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:40,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 342 transitions, 4029 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:40,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:40,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:40,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:40,982 INFO L124 PetriNetUnfolderBase]: 2502/4172 cut-off events. [2024-06-21 18:00:40,982 INFO L125 PetriNetUnfolderBase]: For 314624/314624 co-relation queries the response was YES. [2024-06-21 18:00:41,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33660 conditions, 4172 events. 2502/4172 cut-off events. For 314624/314624 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26281 event pairs, 546 based on Foata normal form. 4/4163 useless extension candidates. Maximal degree in co-relation 33547. Up to 3337 conditions per place. [2024-06-21 18:00:41,049 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 117 changer transitions 0/370 dead transitions. [2024-06-21 18:00:41,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 370 transitions, 5364 flow [2024-06-21 18:00:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:00:41,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-21 18:00:41,051 INFO L175 Difference]: Start difference. First operand has 247 places, 342 transitions, 4029 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:00:41,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 370 transitions, 5364 flow [2024-06-21 18:00:41,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 370 transitions, 5060 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:41,794 INFO L231 Difference]: Finished difference. Result has 250 places, 350 transitions, 4205 flow [2024-06-21 18:00:41,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4205, PETRI_PLACES=250, PETRI_TRANSITIONS=350} [2024-06-21 18:00:41,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 18:00:41,795 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 350 transitions, 4205 flow [2024-06-21 18:00:41,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:41,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:41,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:00:41,795 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:41,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1743372454, now seen corresponding path program 12 times [2024-06-21 18:00:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071368357] [2024-06-21 18:00:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:42,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071368357] [2024-06-21 18:00:42,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071368357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:42,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:42,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:42,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142350358] [2024-06-21 18:00:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:42,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:42,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:42,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 350 transitions, 4205 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:42,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:42,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:42,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:43,633 INFO L124 PetriNetUnfolderBase]: 2490/4173 cut-off events. [2024-06-21 18:00:43,634 INFO L125 PetriNetUnfolderBase]: For 306323/306323 co-relation queries the response was YES. [2024-06-21 18:00:43,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 4173 events. 2490/4173 cut-off events. For 306323/306323 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26332 event pairs, 526 based on Foata normal form. 4/4167 useless extension candidates. Maximal degree in co-relation 32703. Up to 3715 conditions per place. [2024-06-21 18:00:43,693 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 44 changer transitions 0/362 dead transitions. [2024-06-21 18:00:43,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 362 transitions, 4957 flow [2024-06-21 18:00:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:00:43,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:00:43,695 INFO L175 Difference]: Start difference. First operand has 250 places, 350 transitions, 4205 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:00:43,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 362 transitions, 4957 flow [2024-06-21 18:00:44,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 362 transitions, 4702 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:44,340 INFO L231 Difference]: Finished difference. Result has 254 places, 350 transitions, 4045 flow [2024-06-21 18:00:44,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4045, PETRI_PLACES=254, PETRI_TRANSITIONS=350} [2024-06-21 18:00:44,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 18:00:44,341 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 350 transitions, 4045 flow [2024-06-21 18:00:44,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:44,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:44,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:44,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:00:44,342 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:44,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1743375430, now seen corresponding path program 4 times [2024-06-21 18:00:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:44,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478263948] [2024-06-21 18:00:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478263948] [2024-06-21 18:00:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478263948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:45,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229464280] [2024-06-21 18:00:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 350 transitions, 4045 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:46,047 INFO L124 PetriNetUnfolderBase]: 2493/4182 cut-off events. [2024-06-21 18:00:46,047 INFO L125 PetriNetUnfolderBase]: For 304559/304559 co-relation queries the response was YES. [2024-06-21 18:00:46,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32374 conditions, 4182 events. 2493/4182 cut-off events. For 304559/304559 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26439 event pairs, 523 based on Foata normal form. 4/4176 useless extension candidates. Maximal degree in co-relation 32259. Up to 3720 conditions per place. [2024-06-21 18:00:46,107 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 43 changer transitions 0/365 dead transitions. [2024-06-21 18:00:46,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 365 transitions, 4865 flow [2024-06-21 18:00:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:00:46,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:00:46,108 INFO L175 Difference]: Start difference. First operand has 254 places, 350 transitions, 4045 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:00:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 365 transitions, 4865 flow [2024-06-21 18:00:46,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 365 transitions, 4632 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:00:46,749 INFO L231 Difference]: Finished difference. Result has 253 places, 353 transitions, 3982 flow [2024-06-21 18:00:46,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3982, PETRI_PLACES=253, PETRI_TRANSITIONS=353} [2024-06-21 18:00:46,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 18:00:46,750 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 353 transitions, 3982 flow [2024-06-21 18:00:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:46,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:46,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:46,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:00:46,751 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:46,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash -316912806, now seen corresponding path program 2 times [2024-06-21 18:00:46,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:46,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472152054] [2024-06-21 18:00:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:46,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472152054] [2024-06-21 18:00:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472152054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:47,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317068599] [2024-06-21 18:00:47,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:47,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:47,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 353 transitions, 3982 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:47,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:47,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:47,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:48,667 INFO L124 PetriNetUnfolderBase]: 2498/4192 cut-off events. [2024-06-21 18:00:48,667 INFO L125 PetriNetUnfolderBase]: For 302601/302601 co-relation queries the response was YES. [2024-06-21 18:00:48,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32441 conditions, 4192 events. 2498/4192 cut-off events. For 302601/302601 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26426 event pairs, 514 based on Foata normal form. 1/4187 useless extension candidates. Maximal degree in co-relation 32327. Up to 3750 conditions per place. [2024-06-21 18:00:48,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 31 changer transitions 0/378 dead transitions. [2024-06-21 18:00:48,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 378 transitions, 4846 flow [2024-06-21 18:00:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:00:48,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:00:48,741 INFO L175 Difference]: Start difference. First operand has 253 places, 353 transitions, 3982 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:00:48,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 378 transitions, 4846 flow [2024-06-21 18:00:49,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 378 transitions, 4698 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:49,689 INFO L231 Difference]: Finished difference. Result has 255 places, 356 transitions, 3960 flow [2024-06-21 18:00:49,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3960, PETRI_PLACES=255, PETRI_TRANSITIONS=356} [2024-06-21 18:00:49,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 18:00:49,690 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 356 transitions, 3960 flow [2024-06-21 18:00:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:49,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:49,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:49,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:00:49,690 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:49,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash -31812936, now seen corresponding path program 3 times [2024-06-21 18:00:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:49,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853696476] [2024-06-21 18:00:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853696476] [2024-06-21 18:00:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853696476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:50,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108044549] [2024-06-21 18:00:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:50,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:50,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:50,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:50,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 356 transitions, 3960 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:50,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:50,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:50,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:51,645 INFO L124 PetriNetUnfolderBase]: 2503/4201 cut-off events. [2024-06-21 18:00:51,645 INFO L125 PetriNetUnfolderBase]: For 308706/308706 co-relation queries the response was YES. [2024-06-21 18:00:51,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32446 conditions, 4201 events. 2503/4201 cut-off events. For 308706/308706 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 26570 event pairs, 514 based on Foata normal form. 1/4196 useless extension candidates. Maximal degree in co-relation 32331. Up to 3757 conditions per place. [2024-06-21 18:00:51,701 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 32 changer transitions 0/381 dead transitions. [2024-06-21 18:00:51,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 381 transitions, 4836 flow [2024-06-21 18:00:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:00:51,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 18:00:51,703 INFO L175 Difference]: Start difference. First operand has 255 places, 356 transitions, 3960 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:00:51,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 381 transitions, 4836 flow [2024-06-21 18:00:52,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 381 transitions, 4742 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:52,320 INFO L231 Difference]: Finished difference. Result has 257 places, 359 transitions, 4000 flow [2024-06-21 18:00:52,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4000, PETRI_PLACES=257, PETRI_TRANSITIONS=359} [2024-06-21 18:00:52,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 18:00:52,320 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 359 transitions, 4000 flow [2024-06-21 18:00:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:52,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:00:52,321 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:52,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash -18480456, now seen corresponding path program 4 times [2024-06-21 18:00:52,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:52,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801957487] [2024-06-21 18:00:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:52,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801957487] [2024-06-21 18:00:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801957487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:53,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:53,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031703659] [2024-06-21 18:00:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:53,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:53,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 359 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:53,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:53,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:53,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:54,227 INFO L124 PetriNetUnfolderBase]: 2495/4190 cut-off events. [2024-06-21 18:00:54,227 INFO L125 PetriNetUnfolderBase]: For 313247/313247 co-relation queries the response was YES. [2024-06-21 18:00:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32315 conditions, 4190 events. 2495/4190 cut-off events. For 313247/313247 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26458 event pairs, 514 based on Foata normal form. 2/4186 useless extension candidates. Maximal degree in co-relation 32199. Up to 3719 conditions per place. [2024-06-21 18:00:54,279 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 327 selfloop transitions, 44 changer transitions 0/378 dead transitions. [2024-06-21 18:00:54,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 378 transitions, 4802 flow [2024-06-21 18:00:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:00:54,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 18:00:54,280 INFO L175 Difference]: Start difference. First operand has 257 places, 359 transitions, 4000 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:00:54,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 378 transitions, 4802 flow [2024-06-21 18:00:54,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 378 transitions, 4674 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:54,862 INFO L231 Difference]: Finished difference. Result has 259 places, 359 transitions, 3968 flow [2024-06-21 18:00:54,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3968, PETRI_PLACES=259, PETRI_TRANSITIONS=359} [2024-06-21 18:00:54,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 18:00:54,862 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 359 transitions, 3968 flow [2024-06-21 18:00:54,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:54,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:54,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:54,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:00:54,863 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:54,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2023945850, now seen corresponding path program 1 times [2024-06-21 18:00:54,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:54,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137422916] [2024-06-21 18:00:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:54,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:55,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137422916] [2024-06-21 18:00:55,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137422916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:55,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:55,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555372228] [2024-06-21 18:00:55,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:55,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:55,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:55,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:55,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 359 transitions, 3968 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:55,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:55,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:55,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:56,508 INFO L124 PetriNetUnfolderBase]: 2508/4210 cut-off events. [2024-06-21 18:00:56,508 INFO L125 PetriNetUnfolderBase]: For 320500/320500 co-relation queries the response was YES. [2024-06-21 18:00:56,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32604 conditions, 4210 events. 2508/4210 cut-off events. For 320500/320500 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26639 event pairs, 512 based on Foata normal form. 1/4205 useless extension candidates. Maximal degree in co-relation 32487. Up to 3765 conditions per place. [2024-06-21 18:00:56,559 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 35 changer transitions 0/383 dead transitions. [2024-06-21 18:00:56,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 383 transitions, 5036 flow [2024-06-21 18:00:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:00:56,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:00:56,560 INFO L175 Difference]: Start difference. First operand has 259 places, 359 transitions, 3968 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:00:56,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 383 transitions, 5036 flow [2024-06-21 18:00:57,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 383 transitions, 4912 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:57,451 INFO L231 Difference]: Finished difference. Result has 260 places, 365 transitions, 4034 flow [2024-06-21 18:00:57,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4034, PETRI_PLACES=260, PETRI_TRANSITIONS=365} [2024-06-21 18:00:57,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 18:00:57,452 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 365 transitions, 4034 flow [2024-06-21 18:00:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:57,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:57,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:57,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:00:57,452 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:57,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:57,453 INFO L85 PathProgramCache]: Analyzing trace with hash 268618042, now seen corresponding path program 2 times [2024-06-21 18:00:57,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:57,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519161175] [2024-06-21 18:00:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:57,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519161175] [2024-06-21 18:00:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519161175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:58,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:58,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027696836] [2024-06-21 18:00:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:58,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:00:58,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 365 transitions, 4034 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:58,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:58,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:00:58,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:59,101 INFO L124 PetriNetUnfolderBase]: 2505/4202 cut-off events. [2024-06-21 18:00:59,101 INFO L125 PetriNetUnfolderBase]: For 326428/326428 co-relation queries the response was YES. [2024-06-21 18:00:59,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32812 conditions, 4202 events. 2505/4202 cut-off events. For 326428/326428 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26610 event pairs, 510 based on Foata normal form. 1/4197 useless extension candidates. Maximal degree in co-relation 32694. Up to 3771 conditions per place. [2024-06-21 18:00:59,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 32 changer transitions 0/383 dead transitions. [2024-06-21 18:00:59,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 383 transitions, 4853 flow [2024-06-21 18:00:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:00:59,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:00:59,153 INFO L175 Difference]: Start difference. First operand has 260 places, 365 transitions, 4034 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:00:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 383 transitions, 4853 flow [2024-06-21 18:00:59,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 383 transitions, 4736 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:59,837 INFO L231 Difference]: Finished difference. Result has 265 places, 367 transitions, 4018 flow [2024-06-21 18:00:59,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3918, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4018, PETRI_PLACES=265, PETRI_TRANSITIONS=367} [2024-06-21 18:00:59,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 18:00:59,837 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 367 transitions, 4018 flow [2024-06-21 18:00:59,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:59,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:59,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:59,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:00:59,838 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:59,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1633633752, now seen corresponding path program 3 times [2024-06-21 18:00:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:59,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694097566] [2024-06-21 18:00:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:00,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:00,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694097566] [2024-06-21 18:01:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694097566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:00,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:00,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4055919] [2024-06-21 18:01:00,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:00,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:00,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:00,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:00,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 367 transitions, 4018 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:00,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:00,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:01,460 INFO L124 PetriNetUnfolderBase]: 2518/4219 cut-off events. [2024-06-21 18:01:01,460 INFO L125 PetriNetUnfolderBase]: For 337183/337183 co-relation queries the response was YES. [2024-06-21 18:01:01,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33197 conditions, 4219 events. 2518/4219 cut-off events. For 337183/337183 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26655 event pairs, 518 based on Foata normal form. 1/4212 useless extension candidates. Maximal degree in co-relation 33076. Up to 3668 conditions per place. [2024-06-21 18:01:01,515 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 77 changer transitions 0/396 dead transitions. [2024-06-21 18:01:01,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 5354 flow [2024-06-21 18:01:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:01:01,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 18:01:01,516 INFO L175 Difference]: Start difference. First operand has 265 places, 367 transitions, 4018 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:01:01,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 5354 flow [2024-06-21 18:01:02,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 396 transitions, 5291 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 18:01:02,305 INFO L231 Difference]: Finished difference. Result has 270 places, 379 transitions, 4371 flow [2024-06-21 18:01:02,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4371, PETRI_PLACES=270, PETRI_TRANSITIONS=379} [2024-06-21 18:01:02,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 18:01:02,306 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 379 transitions, 4371 flow [2024-06-21 18:01:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:02,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:02,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:02,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:01:02,307 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:02,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:02,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1363243692, now seen corresponding path program 4 times [2024-06-21 18:01:02,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:02,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905857531] [2024-06-21 18:01:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:02,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:03,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905857531] [2024-06-21 18:01:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905857531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:03,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:03,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249571447] [2024-06-21 18:01:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:03,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:03,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 379 transitions, 4371 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:03,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:03,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:03,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:04,023 INFO L124 PetriNetUnfolderBase]: 2531/4241 cut-off events. [2024-06-21 18:01:04,023 INFO L125 PetriNetUnfolderBase]: For 350597/350597 co-relation queries the response was YES. [2024-06-21 18:01:04,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34093 conditions, 4241 events. 2531/4241 cut-off events. For 350597/350597 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26840 event pairs, 518 based on Foata normal form. 1/4234 useless extension candidates. Maximal degree in co-relation 33969. Up to 3683 conditions per place. [2024-06-21 18:01:04,073 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 314 selfloop transitions, 81 changer transitions 0/402 dead transitions. [2024-06-21 18:01:04,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 402 transitions, 5664 flow [2024-06-21 18:01:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:01:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 18:01:04,074 INFO L175 Difference]: Start difference. First operand has 270 places, 379 transitions, 4371 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:01:04,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 402 transitions, 5664 flow [2024-06-21 18:01:04,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 402 transitions, 5501 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 18:01:04,838 INFO L231 Difference]: Finished difference. Result has 276 places, 386 transitions, 4557 flow [2024-06-21 18:01:04,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4557, PETRI_PLACES=276, PETRI_TRANSITIONS=386} [2024-06-21 18:01:04,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 18:01:04,839 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 386 transitions, 4557 flow [2024-06-21 18:01:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:04,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:04,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:04,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:01:04,840 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:04,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1355200122, now seen corresponding path program 5 times [2024-06-21 18:01:04,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:04,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093666751] [2024-06-21 18:01:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:05,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:05,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093666751] [2024-06-21 18:01:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093666751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:05,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:05,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:05,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992859398] [2024-06-21 18:01:05,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:05,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:05,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:05,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:05,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 386 transitions, 4557 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:06,448 INFO L124 PetriNetUnfolderBase]: 2528/4235 cut-off events. [2024-06-21 18:01:06,448 INFO L125 PetriNetUnfolderBase]: For 352732/352732 co-relation queries the response was YES. [2024-06-21 18:01:06,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34004 conditions, 4235 events. 2528/4235 cut-off events. For 352732/352732 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26810 event pairs, 518 based on Foata normal form. 1/4228 useless extension candidates. Maximal degree in co-relation 33877. Up to 3720 conditions per place. [2024-06-21 18:01:06,505 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 59 changer transitions 0/403 dead transitions. [2024-06-21 18:01:06,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 403 transitions, 5615 flow [2024-06-21 18:01:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:01:06,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:01:06,506 INFO L175 Difference]: Start difference. First operand has 276 places, 386 transitions, 4557 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:01:06,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 403 transitions, 5615 flow [2024-06-21 18:01:07,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 403 transitions, 5416 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 18:01:07,804 INFO L231 Difference]: Finished difference. Result has 281 places, 388 transitions, 4562 flow [2024-06-21 18:01:07,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=281, PETRI_TRANSITIONS=388} [2024-06-21 18:01:07,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 18:01:07,805 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 388 transitions, 4562 flow [2024-06-21 18:01:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:07,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:07,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:07,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:01:07,805 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:07,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 609069548, now seen corresponding path program 6 times [2024-06-21 18:01:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:07,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368604269] [2024-06-21 18:01:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:07,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:08,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:08,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368604269] [2024-06-21 18:01:08,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368604269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:08,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:08,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400703826] [2024-06-21 18:01:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:08,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:08,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:08,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:08,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 388 transitions, 4562 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:08,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:08,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:08,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:09,595 INFO L124 PetriNetUnfolderBase]: 2533/4242 cut-off events. [2024-06-21 18:01:09,595 INFO L125 PetriNetUnfolderBase]: For 360183/360183 co-relation queries the response was YES. [2024-06-21 18:01:09,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34123 conditions, 4242 events. 2533/4242 cut-off events. For 360183/360183 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26854 event pairs, 518 based on Foata normal form. 1/4235 useless extension candidates. Maximal degree in co-relation 33994. Up to 3747 conditions per place. [2024-06-21 18:01:09,651 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 53 changer transitions 0/406 dead transitions. [2024-06-21 18:01:09,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 406 transitions, 5491 flow [2024-06-21 18:01:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:01:09,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:01:09,652 INFO L175 Difference]: Start difference. First operand has 281 places, 388 transitions, 4562 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:01:09,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 406 transitions, 5491 flow [2024-06-21 18:01:10,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 406 transitions, 5368 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:01:10,727 INFO L231 Difference]: Finished difference. Result has 285 places, 393 transitions, 4669 flow [2024-06-21 18:01:10,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4669, PETRI_PLACES=285, PETRI_TRANSITIONS=393} [2024-06-21 18:01:10,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 18:01:10,727 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 393 transitions, 4669 flow [2024-06-21 18:01:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:10,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:10,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:01:10,728 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:10,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1489647202, now seen corresponding path program 7 times [2024-06-21 18:01:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:10,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666006265] [2024-06-21 18:01:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:10,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:11,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:11,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666006265] [2024-06-21 18:01:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666006265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:11,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:11,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:11,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90394236] [2024-06-21 18:01:11,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:11,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:11,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 393 transitions, 4669 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:11,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:11,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:11,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:12,365 INFO L124 PetriNetUnfolderBase]: 2530/4240 cut-off events. [2024-06-21 18:01:12,365 INFO L125 PetriNetUnfolderBase]: For 364883/364883 co-relation queries the response was YES. [2024-06-21 18:01:12,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34128 conditions, 4240 events. 2530/4240 cut-off events. For 364883/364883 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26846 event pairs, 518 based on Foata normal form. 1/4233 useless extension candidates. Maximal degree in co-relation 33997. Up to 3743 conditions per place. [2024-06-21 18:01:12,420 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 57 changer transitions 0/407 dead transitions. [2024-06-21 18:01:12,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 407 transitions, 5519 flow [2024-06-21 18:01:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:01:12,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:01:12,421 INFO L175 Difference]: Start difference. First operand has 285 places, 393 transitions, 4669 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:01:12,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 407 transitions, 5519 flow [2024-06-21 18:01:13,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 407 transitions, 5366 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 18:01:13,335 INFO L231 Difference]: Finished difference. Result has 289 places, 394 transitions, 4646 flow [2024-06-21 18:01:13,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4646, PETRI_PLACES=289, PETRI_TRANSITIONS=394} [2024-06-21 18:01:13,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 18:01:13,336 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 394 transitions, 4646 flow [2024-06-21 18:01:13,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:13,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:13,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:13,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:01:13,336 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:13,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1148338362, now seen corresponding path program 8 times [2024-06-21 18:01:13,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:13,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858348002] [2024-06-21 18:01:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858348002] [2024-06-21 18:01:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858348002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:14,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:14,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:14,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105680147] [2024-06-21 18:01:14,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:14,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:14,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:14,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:14,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:14,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 394 transitions, 4646 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:14,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:14,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:14,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:15,019 INFO L124 PetriNetUnfolderBase]: 2527/4234 cut-off events. [2024-06-21 18:01:15,019 INFO L125 PetriNetUnfolderBase]: For 369265/369265 co-relation queries the response was YES. [2024-06-21 18:01:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34072 conditions, 4234 events. 2527/4234 cut-off events. For 369265/369265 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26811 event pairs, 518 based on Foata normal form. 1/4227 useless extension candidates. Maximal degree in co-relation 33940. Up to 3727 conditions per place. [2024-06-21 18:01:15,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 68 changer transitions 0/407 dead transitions. [2024-06-21 18:01:15,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 407 transitions, 5486 flow [2024-06-21 18:01:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:01:15,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:01:15,076 INFO L175 Difference]: Start difference. First operand has 289 places, 394 transitions, 4646 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:01:15,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 407 transitions, 5486 flow [2024-06-21 18:01:16,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 407 transitions, 5367 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 18:01:16,077 INFO L231 Difference]: Finished difference. Result has 293 places, 394 transitions, 4669 flow [2024-06-21 18:01:16,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4669, PETRI_PLACES=293, PETRI_TRANSITIONS=394} [2024-06-21 18:01:16,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 18:01:16,078 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 394 transitions, 4669 flow [2024-06-21 18:01:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:16,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:16,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:16,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:01:16,078 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:16,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash 194662234, now seen corresponding path program 1 times [2024-06-21 18:01:16,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:16,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495290160] [2024-06-21 18:01:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:16,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:16,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495290160] [2024-06-21 18:01:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495290160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:16,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936832186] [2024-06-21 18:01:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:16,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:16,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 394 transitions, 4669 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:16,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:16,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:16,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:17,953 INFO L124 PetriNetUnfolderBase]: 2535/4252 cut-off events. [2024-06-21 18:01:17,953 INFO L125 PetriNetUnfolderBase]: For 382205/382207 co-relation queries the response was YES. [2024-06-21 18:01:17,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34359 conditions, 4252 events. 2535/4252 cut-off events. For 382205/382207 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26938 event pairs, 474 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 34226. Up to 3850 conditions per place. [2024-06-21 18:01:18,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 17 changer transitions 0/419 dead transitions. [2024-06-21 18:01:18,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 419 transitions, 5645 flow [2024-06-21 18:01:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:01:18,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 18:01:18,016 INFO L175 Difference]: Start difference. First operand has 293 places, 394 transitions, 4669 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:01:18,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 419 transitions, 5645 flow [2024-06-21 18:01:19,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 419 transitions, 5457 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:19,124 INFO L231 Difference]: Finished difference. Result has 296 places, 398 transitions, 4621 flow [2024-06-21 18:01:19,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4621, PETRI_PLACES=296, PETRI_TRANSITIONS=398} [2024-06-21 18:01:19,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 18:01:19,124 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 398 transitions, 4621 flow [2024-06-21 18:01:19,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:19,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:19,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:19,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:01:19,125 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:19,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash -18469544, now seen corresponding path program 2 times [2024-06-21 18:01:19,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:19,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785977765] [2024-06-21 18:01:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:19,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:19,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785977765] [2024-06-21 18:01:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785977765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516036623] [2024-06-21 18:01:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:20,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:20,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 398 transitions, 4621 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:20,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:20,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:20,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:21,295 INFO L124 PetriNetUnfolderBase]: 2543/4266 cut-off events. [2024-06-21 18:01:21,296 INFO L125 PetriNetUnfolderBase]: For 391311/391313 co-relation queries the response was YES. [2024-06-21 18:01:21,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34571 conditions, 4266 events. 2543/4266 cut-off events. For 391311/391313 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27039 event pairs, 508 based on Foata normal form. 2/4266 useless extension candidates. Maximal degree in co-relation 34436. Up to 3879 conditions per place. [2024-06-21 18:01:21,383 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 18 changer transitions 0/417 dead transitions. [2024-06-21 18:01:21,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 417 transitions, 5573 flow [2024-06-21 18:01:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 18:01:21,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 18:01:21,385 INFO L175 Difference]: Start difference. First operand has 296 places, 398 transitions, 4621 flow. Second operand 9 states and 166 transitions. [2024-06-21 18:01:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 417 transitions, 5573 flow [2024-06-21 18:01:22,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 417 transitions, 5466 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:22,790 INFO L231 Difference]: Finished difference. Result has 299 places, 400 transitions, 4643 flow [2024-06-21 18:01:22,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4643, PETRI_PLACES=299, PETRI_TRANSITIONS=400} [2024-06-21 18:01:22,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 18:01:22,791 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 400 transitions, 4643 flow [2024-06-21 18:01:22,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:22,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:22,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:22,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:01:22,791 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:22,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1903549390, now seen corresponding path program 1 times [2024-06-21 18:01:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149733991] [2024-06-21 18:01:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:22,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149733991] [2024-06-21 18:01:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149733991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:23,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:23,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164690026] [2024-06-21 18:01:23,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:23,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 400 transitions, 4643 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:24,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:25,228 INFO L124 PetriNetUnfolderBase]: 2553/4285 cut-off events. [2024-06-21 18:01:25,228 INFO L125 PetriNetUnfolderBase]: For 401983/401983 co-relation queries the response was YES. [2024-06-21 18:01:25,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34807 conditions, 4285 events. 2553/4285 cut-off events. For 401983/401983 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27172 event pairs, 502 based on Foata normal form. 2/4281 useless extension candidates. Maximal degree in co-relation 34671. Up to 3796 conditions per place. [2024-06-21 18:01:25,319 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 363 selfloop transitions, 54 changer transitions 0/424 dead transitions. [2024-06-21 18:01:25,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 424 transitions, 5675 flow [2024-06-21 18:01:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:01:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:01:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 18:01:25,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:01:25,321 INFO L175 Difference]: Start difference. First operand has 299 places, 400 transitions, 4643 flow. Second operand 10 states and 190 transitions. [2024-06-21 18:01:25,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 424 transitions, 5675 flow [2024-06-21 18:01:26,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 424 transitions, 5562 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:26,797 INFO L231 Difference]: Finished difference. Result has 303 places, 406 transitions, 4804 flow [2024-06-21 18:01:26,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4804, PETRI_PLACES=303, PETRI_TRANSITIONS=406} [2024-06-21 18:01:26,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 18:01:26,798 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 406 transitions, 4804 flow [2024-06-21 18:01:26,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:26,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:26,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:26,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:01:26,799 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:26,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash 411594172, now seen corresponding path program 3 times [2024-06-21 18:01:26,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:26,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075151398] [2024-06-21 18:01:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:26,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:27,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075151398] [2024-06-21 18:01:27,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075151398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:27,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:27,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:27,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363643043] [2024-06-21 18:01:27,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:27,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:27,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:27,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:27,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 406 transitions, 4804 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:27,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:27,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:27,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:28,802 INFO L124 PetriNetUnfolderBase]: 2561/4299 cut-off events. [2024-06-21 18:01:28,802 INFO L125 PetriNetUnfolderBase]: For 412735/412735 co-relation queries the response was YES. [2024-06-21 18:01:28,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35424 conditions, 4299 events. 2561/4299 cut-off events. For 412735/412735 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27330 event pairs, 505 based on Foata normal form. 2/4299 useless extension candidates. Maximal degree in co-relation 35286. Up to 3911 conditions per place. [2024-06-21 18:01:28,870 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 399 selfloop transitions, 17 changer transitions 0/423 dead transitions. [2024-06-21 18:01:28,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 423 transitions, 5776 flow [2024-06-21 18:01:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 18:01:28,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 18:01:28,872 INFO L175 Difference]: Start difference. First operand has 303 places, 406 transitions, 4804 flow. Second operand 8 states and 150 transitions. [2024-06-21 18:01:28,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 423 transitions, 5776 flow [2024-06-21 18:01:29,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 423 transitions, 5566 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:29,968 INFO L231 Difference]: Finished difference. Result has 306 places, 409 transitions, 4745 flow [2024-06-21 18:01:29,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4745, PETRI_PLACES=306, PETRI_TRANSITIONS=409} [2024-06-21 18:01:29,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 18:01:29,969 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 409 transitions, 4745 flow [2024-06-21 18:01:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:29,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:29,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:29,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:01:29,969 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:29,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -39281926, now seen corresponding path program 2 times [2024-06-21 18:01:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015324739] [2024-06-21 18:01:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015324739] [2024-06-21 18:01:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015324739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:30,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:30,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370662958] [2024-06-21 18:01:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:31,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:31,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 409 transitions, 4745 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:31,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:31,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:31,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:32,163 INFO L124 PetriNetUnfolderBase]: 2571/4315 cut-off events. [2024-06-21 18:01:32,164 INFO L125 PetriNetUnfolderBase]: For 422400/422400 co-relation queries the response was YES. [2024-06-21 18:01:32,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35557 conditions, 4315 events. 2571/4315 cut-off events. For 422400/422400 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 27463 event pairs, 502 based on Foata normal form. 2/4311 useless extension candidates. Maximal degree in co-relation 35416. Up to 3744 conditions per place. [2024-06-21 18:01:32,231 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 88 changer transitions 0/429 dead transitions. [2024-06-21 18:01:32,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 429 transitions, 5944 flow [2024-06-21 18:01:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:01:32,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:01:32,232 INFO L175 Difference]: Start difference. First operand has 306 places, 409 transitions, 4745 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:01:32,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 429 transitions, 5944 flow [2024-06-21 18:01:33,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 429 transitions, 5812 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:33,737 INFO L231 Difference]: Finished difference. Result has 309 places, 413 transitions, 4942 flow [2024-06-21 18:01:33,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4942, PETRI_PLACES=309, PETRI_TRANSITIONS=413} [2024-06-21 18:01:33,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 18:01:33,738 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 413 transitions, 4942 flow [2024-06-21 18:01:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:33,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:33,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:33,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:01:33,738 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash -45948166, now seen corresponding path program 3 times [2024-06-21 18:01:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:33,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722281132] [2024-06-21 18:01:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722281132] [2024-06-21 18:01:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722281132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:35,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767244059] [2024-06-21 18:01:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:35,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:35,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:35,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 413 transitions, 4942 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:35,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:35,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:35,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:36,657 INFO L124 PetriNetUnfolderBase]: 2591/4345 cut-off events. [2024-06-21 18:01:36,657 INFO L125 PetriNetUnfolderBase]: For 432586/432586 co-relation queries the response was YES. [2024-06-21 18:01:36,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36303 conditions, 4345 events. 2591/4345 cut-off events. For 432586/432586 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27642 event pairs, 502 based on Foata normal form. 2/4341 useless extension candidates. Maximal degree in co-relation 36162. Up to 3788 conditions per place. [2024-06-21 18:01:36,724 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 72 changer transitions 0/436 dead transitions. [2024-06-21 18:01:36,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 436 transitions, 5997 flow [2024-06-21 18:01:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:01:36,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 18:01:36,725 INFO L175 Difference]: Start difference. First operand has 309 places, 413 transitions, 4942 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:01:36,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 436 transitions, 5997 flow [2024-06-21 18:01:37,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 436 transitions, 5700 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:37,957 INFO L231 Difference]: Finished difference. Result has 313 places, 421 transitions, 4968 flow [2024-06-21 18:01:37,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4968, PETRI_PLACES=313, PETRI_TRANSITIONS=421} [2024-06-21 18:01:37,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 18:01:37,957 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 421 transitions, 4968 flow [2024-06-21 18:01:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:37,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:37,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:01:37,958 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:37,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash 268894810, now seen corresponding path program 4 times [2024-06-21 18:01:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:37,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297983924] [2024-06-21 18:01:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:38,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297983924] [2024-06-21 18:01:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297983924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:38,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:38,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461926412] [2024-06-21 18:01:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:38,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:39,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:39,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 421 transitions, 4968 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:39,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:39,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:39,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:40,223 INFO L124 PetriNetUnfolderBase]: 2585/4337 cut-off events. [2024-06-21 18:01:40,224 INFO L125 PetriNetUnfolderBase]: For 432211/432211 co-relation queries the response was YES. [2024-06-21 18:01:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35971 conditions, 4337 events. 2585/4337 cut-off events. For 432211/432211 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27587 event pairs, 502 based on Foata normal form. 2/4333 useless extension candidates. Maximal degree in co-relation 35828. Up to 3846 conditions per place. [2024-06-21 18:01:40,289 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 54 changer transitions 0/436 dead transitions. [2024-06-21 18:01:40,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 436 transitions, 5869 flow [2024-06-21 18:01:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:01:40,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:01:40,290 INFO L175 Difference]: Start difference. First operand has 313 places, 421 transitions, 4968 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:01:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 436 transitions, 5869 flow [2024-06-21 18:01:41,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 436 transitions, 5599 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:41,695 INFO L231 Difference]: Finished difference. Result has 316 places, 421 transitions, 4813 flow [2024-06-21 18:01:41,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4813, PETRI_PLACES=316, PETRI_TRANSITIONS=421} [2024-06-21 18:01:41,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 18:01:41,695 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 421 transitions, 4813 flow [2024-06-21 18:01:41,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:41,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:41,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:41,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:01:41,696 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:41,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash 381267226, now seen corresponding path program 4 times [2024-06-21 18:01:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:41,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166844581] [2024-06-21 18:01:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:41,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:42,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:42,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166844581] [2024-06-21 18:01:42,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166844581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:42,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:42,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:42,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581940452] [2024-06-21 18:01:42,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:42,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:42,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 421 transitions, 4813 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:42,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:42,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:42,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:43,675 INFO L124 PetriNetUnfolderBase]: 2580/4329 cut-off events. [2024-06-21 18:01:43,675 INFO L125 PetriNetUnfolderBase]: For 435042/435042 co-relation queries the response was YES. [2024-06-21 18:01:43,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35546 conditions, 4329 events. 2580/4329 cut-off events. For 435042/435042 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27637 event pairs, 508 based on Foata normal form. 2/4328 useless extension candidates. Maximal degree in co-relation 35403. Up to 3929 conditions per place. [2024-06-21 18:01:43,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 404 selfloop transitions, 24 changer transitions 0/435 dead transitions. [2024-06-21 18:01:43,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 435 transitions, 5803 flow [2024-06-21 18:01:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 18:01:43,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 18:01:43,746 INFO L175 Difference]: Start difference. First operand has 316 places, 421 transitions, 4813 flow. Second operand 8 states and 150 transitions. [2024-06-21 18:01:43,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 435 transitions, 5803 flow [2024-06-21 18:01:44,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 435 transitions, 5626 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 18:01:44,922 INFO L231 Difference]: Finished difference. Result has 315 places, 424 transitions, 4805 flow [2024-06-21 18:01:44,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4805, PETRI_PLACES=315, PETRI_TRANSITIONS=424} [2024-06-21 18:01:44,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 18:01:44,923 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 424 transitions, 4805 flow [2024-06-21 18:01:44,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:44,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:44,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:01:44,923 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:44,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash 34619514, now seen corresponding path program 5 times [2024-06-21 18:01:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482605668] [2024-06-21 18:01:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:44,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:45,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:45,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482605668] [2024-06-21 18:01:45,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482605668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:45,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:45,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:45,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284364374] [2024-06-21 18:01:45,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:45,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:45,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:45,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 424 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:45,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:45,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:45,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:47,087 INFO L124 PetriNetUnfolderBase]: 2598/4350 cut-off events. [2024-06-21 18:01:47,087 INFO L125 PetriNetUnfolderBase]: For 449588/449588 co-relation queries the response was YES. [2024-06-21 18:01:47,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36010 conditions, 4350 events. 2598/4350 cut-off events. For 449588/449588 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27692 event pairs, 529 based on Foata normal form. 2/4344 useless extension candidates. Maximal degree in co-relation 35867. Up to 3613 conditions per place. [2024-06-21 18:01:47,158 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 270 selfloop transitions, 168 changer transitions 0/445 dead transitions. [2024-06-21 18:01:47,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 445 transitions, 6192 flow [2024-06-21 18:01:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:01:47,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 18:01:47,159 INFO L175 Difference]: Start difference. First operand has 315 places, 424 transitions, 4805 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:01:47,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 445 transitions, 6192 flow [2024-06-21 18:01:48,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 445 transitions, 6032 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:48,547 INFO L231 Difference]: Finished difference. Result has 318 places, 432 transitions, 5292 flow [2024-06-21 18:01:48,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5292, PETRI_PLACES=318, PETRI_TRANSITIONS=432} [2024-06-21 18:01:48,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 18:01:48,548 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 432 transitions, 5292 flow [2024-06-21 18:01:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:48,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:48,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:01:48,548 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:48,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash 387938426, now seen corresponding path program 6 times [2024-06-21 18:01:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:48,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150720688] [2024-06-21 18:01:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:48,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:49,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:49,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150720688] [2024-06-21 18:01:49,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150720688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:49,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:49,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:49,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606525174] [2024-06-21 18:01:49,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:49,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:49,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:49,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:49,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 432 transitions, 5292 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:49,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:49,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:49,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:50,597 INFO L124 PetriNetUnfolderBase]: 2608/4370 cut-off events. [2024-06-21 18:01:50,597 INFO L125 PetriNetUnfolderBase]: For 464392/464392 co-relation queries the response was YES. [2024-06-21 18:01:50,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36878 conditions, 4370 events. 2608/4370 cut-off events. For 464392/464392 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27944 event pairs, 531 based on Foata normal form. 2/4362 useless extension candidates. Maximal degree in co-relation 36735. Up to 3693 conditions per place. [2024-06-21 18:01:50,656 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 329 selfloop transitions, 112 changer transitions 0/448 dead transitions. [2024-06-21 18:01:50,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 448 transitions, 6363 flow [2024-06-21 18:01:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:01:50,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:01:50,657 INFO L175 Difference]: Start difference. First operand has 318 places, 432 transitions, 5292 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:01:50,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 448 transitions, 6363 flow [2024-06-21 18:01:52,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 448 transitions, 6014 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-21 18:01:52,054 INFO L231 Difference]: Finished difference. Result has 322 places, 436 transitions, 5338 flow [2024-06-21 18:01:52,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5338, PETRI_PLACES=322, PETRI_TRANSITIONS=436} [2024-06-21 18:01:52,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 18:01:52,055 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 436 transitions, 5338 flow [2024-06-21 18:01:52,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:52,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:52,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:52,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:01:52,055 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:52,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1355209050, now seen corresponding path program 7 times [2024-06-21 18:01:52,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:52,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803145910] [2024-06-21 18:01:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:52,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:53,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:53,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803145910] [2024-06-21 18:01:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803145910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:53,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:53,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:53,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459799816] [2024-06-21 18:01:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:53,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 436 transitions, 5338 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:53,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:53,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:53,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:54,095 INFO L124 PetriNetUnfolderBase]: 2602/4360 cut-off events. [2024-06-21 18:01:54,096 INFO L125 PetriNetUnfolderBase]: For 460749/460749 co-relation queries the response was YES. [2024-06-21 18:01:54,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36673 conditions, 4360 events. 2602/4360 cut-off events. For 460749/460749 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 27853 event pairs, 529 based on Foata normal form. 2/4352 useless extension candidates. Maximal degree in co-relation 36528. Up to 3685 conditions per place. [2024-06-21 18:01:54,153 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 309 selfloop transitions, 132 changer transitions 0/448 dead transitions. [2024-06-21 18:01:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 448 transitions, 6253 flow [2024-06-21 18:01:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:01:54,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:01:54,154 INFO L175 Difference]: Start difference. First operand has 322 places, 436 transitions, 5338 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:01:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 448 transitions, 6253 flow [2024-06-21 18:01:55,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 448 transitions, 5842 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:55,693 INFO L231 Difference]: Finished difference. Result has 324 places, 436 transitions, 5198 flow [2024-06-21 18:01:55,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5198, PETRI_PLACES=324, PETRI_TRANSITIONS=436} [2024-06-21 18:01:55,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 18:01:55,694 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 436 transitions, 5198 flow [2024-06-21 18:01:55,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:55,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:55,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:55,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:01:55,694 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:55,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1277439750, now seen corresponding path program 1 times [2024-06-21 18:01:55,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:55,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108196846] [2024-06-21 18:01:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:56,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108196846] [2024-06-21 18:01:56,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108196846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:56,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:56,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:56,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333990697] [2024-06-21 18:01:56,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:56,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:56,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:56,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 436 transitions, 5198 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:56,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:56,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:56,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:57,392 INFO L124 PetriNetUnfolderBase]: 2612/4382 cut-off events. [2024-06-21 18:01:57,392 INFO L125 PetriNetUnfolderBase]: For 467300/467300 co-relation queries the response was YES. [2024-06-21 18:01:57,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36705 conditions, 4382 events. 2612/4382 cut-off events. For 467300/467300 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28029 event pairs, 510 based on Foata normal form. 2/4375 useless extension candidates. Maximal degree in co-relation 36559. Up to 3836 conditions per place. [2024-06-21 18:01:57,450 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 384 selfloop transitions, 62 changer transitions 0/453 dead transitions. [2024-06-21 18:01:57,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 453 transitions, 6218 flow [2024-06-21 18:01:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:01:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:01:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 18:01:57,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 18:01:57,452 INFO L175 Difference]: Start difference. First operand has 324 places, 436 transitions, 5198 flow. Second operand 7 states and 145 transitions. [2024-06-21 18:01:57,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 453 transitions, 6218 flow [2024-06-21 18:01:59,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 453 transitions, 5849 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 18:01:59,009 INFO L231 Difference]: Finished difference. Result has 323 places, 439 transitions, 5050 flow [2024-06-21 18:01:59,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4829, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5050, PETRI_PLACES=323, PETRI_TRANSITIONS=439} [2024-06-21 18:01:59,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 18:01:59,010 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 439 transitions, 5050 flow [2024-06-21 18:01:59,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:59,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:59,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:01:59,010 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:59,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash 339508296, now seen corresponding path program 2 times [2024-06-21 18:01:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:59,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438014124] [2024-06-21 18:01:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:59,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:59,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438014124] [2024-06-21 18:01:59,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438014124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:59,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:59,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:59,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246032355] [2024-06-21 18:01:59,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:59,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:59,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:59,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:01:59,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 439 transitions, 5050 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:59,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:59,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:01:59,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:00,876 INFO L124 PetriNetUnfolderBase]: 2643/4433 cut-off events. [2024-06-21 18:02:00,876 INFO L125 PetriNetUnfolderBase]: For 481953/481953 co-relation queries the response was YES. [2024-06-21 18:02:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37140 conditions, 4433 events. 2643/4433 cut-off events. For 481953/481953 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28364 event pairs, 511 based on Foata normal form. 2/4426 useless extension candidates. Maximal degree in co-relation 36993. Up to 3736 conditions per place. [2024-06-21 18:02:00,943 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 110 changer transitions 0/465 dead transitions. [2024-06-21 18:02:00,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 465 transitions, 6396 flow [2024-06-21 18:02:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 18:02:00,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-21 18:02:00,944 INFO L175 Difference]: Start difference. First operand has 323 places, 439 transitions, 5050 flow. Second operand 8 states and 167 transitions. [2024-06-21 18:02:00,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 465 transitions, 6396 flow [2024-06-21 18:02:03,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 465 transitions, 6253 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 18:02:03,146 INFO L231 Difference]: Finished difference. Result has 327 places, 448 transitions, 5373 flow [2024-06-21 18:02:03,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4907, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5373, PETRI_PLACES=327, PETRI_TRANSITIONS=448} [2024-06-21 18:02:03,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 18:02:03,147 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 448 transitions, 5373 flow [2024-06-21 18:02:03,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:03,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:03,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:03,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:02:03,148 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:03,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -235444492, now seen corresponding path program 3 times [2024-06-21 18:02:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100168143] [2024-06-21 18:02:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:03,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:03,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100168143] [2024-06-21 18:02:03,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100168143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:03,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:03,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:03,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850815699] [2024-06-21 18:02:03,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:03,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:03,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:03,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:03,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:03,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:03,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 448 transitions, 5373 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:03,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:03,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:03,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:04,998 INFO L124 PetriNetUnfolderBase]: 2637/4425 cut-off events. [2024-06-21 18:02:04,998 INFO L125 PetriNetUnfolderBase]: For 482479/482479 co-relation queries the response was YES. [2024-06-21 18:02:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37247 conditions, 4425 events. 2637/4425 cut-off events. For 482479/482479 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28346 event pairs, 508 based on Foata normal form. 2/4418 useless extension candidates. Maximal degree in co-relation 37098. Up to 3731 conditions per place. [2024-06-21 18:02:05,081 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 125 changer transitions 0/464 dead transitions. [2024-06-21 18:02:05,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 464 transitions, 6365 flow [2024-06-21 18:02:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:02:05,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-21 18:02:05,082 INFO L175 Difference]: Start difference. First operand has 327 places, 448 transitions, 5373 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:02:05,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 464 transitions, 6365 flow [2024-06-21 18:02:07,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 464 transitions, 6243 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 18:02:07,279 INFO L231 Difference]: Finished difference. Result has 331 places, 448 transitions, 5515 flow [2024-06-21 18:02:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5515, PETRI_PLACES=331, PETRI_TRANSITIONS=448} [2024-06-21 18:02:07,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 18:02:07,280 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 448 transitions, 5515 flow [2024-06-21 18:02:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:07,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:07,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:02:07,280 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:07,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1313871142, now seen corresponding path program 4 times [2024-06-21 18:02:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:07,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107683415] [2024-06-21 18:02:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:07,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:07,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107683415] [2024-06-21 18:02:07,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107683415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:07,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:07,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:07,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444469759] [2024-06-21 18:02:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:07,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:07,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:07,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:07,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 448 transitions, 5515 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:07,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:07,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:07,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:09,049 INFO L124 PetriNetUnfolderBase]: 2647/4439 cut-off events. [2024-06-21 18:02:09,049 INFO L125 PetriNetUnfolderBase]: For 482893/482893 co-relation queries the response was YES. [2024-06-21 18:02:09,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37623 conditions, 4439 events. 2647/4439 cut-off events. For 482893/482893 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28448 event pairs, 512 based on Foata normal form. 2/4432 useless extension candidates. Maximal degree in co-relation 37473. Up to 3919 conditions per place. [2024-06-21 18:02:09,124 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 40 changer transitions 0/469 dead transitions. [2024-06-21 18:02:09,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 469 transitions, 6585 flow [2024-06-21 18:02:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:02:09,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 18:02:09,125 INFO L175 Difference]: Start difference. First operand has 331 places, 448 transitions, 5515 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:02:09,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 469 transitions, 6585 flow [2024-06-21 18:02:11,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 469 transitions, 6339 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:02:11,285 INFO L231 Difference]: Finished difference. Result has 332 places, 451 transitions, 5434 flow [2024-06-21 18:02:11,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5434, PETRI_PLACES=332, PETRI_TRANSITIONS=451} [2024-06-21 18:02:11,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 18:02:11,286 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 451 transitions, 5434 flow [2024-06-21 18:02:11,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:11,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:11,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:11,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:02:11,286 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:11,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash 726609674, now seen corresponding path program 5 times [2024-06-21 18:02:11,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:11,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72890632] [2024-06-21 18:02:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:11,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:11,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72890632] [2024-06-21 18:02:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72890632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:11,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904442274] [2024-06-21 18:02:11,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:11,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:11,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:11,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 451 transitions, 5434 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:12,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:12,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:12,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:13,207 INFO L124 PetriNetUnfolderBase]: 2657/4459 cut-off events. [2024-06-21 18:02:13,207 INFO L125 PetriNetUnfolderBase]: For 482847/482847 co-relation queries the response was YES. [2024-06-21 18:02:13,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37590 conditions, 4459 events. 2657/4459 cut-off events. For 482847/482847 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28596 event pairs, 511 based on Foata normal form. 2/4452 useless extension candidates. Maximal degree in co-relation 37440. Up to 3796 conditions per place. [2024-06-21 18:02:13,277 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 77 changer transitions 0/471 dead transitions. [2024-06-21 18:02:13,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 471 transitions, 6710 flow [2024-06-21 18:02:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 18:02:13,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 18:02:13,278 INFO L175 Difference]: Start difference. First operand has 332 places, 451 transitions, 5434 flow. Second operand 8 states and 162 transitions. [2024-06-21 18:02:13,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 471 transitions, 6710 flow [2024-06-21 18:02:15,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 471 transitions, 6581 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 18:02:15,161 INFO L231 Difference]: Finished difference. Result has 334 places, 454 transitions, 5545 flow [2024-06-21 18:02:15,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5545, PETRI_PLACES=334, PETRI_TRANSITIONS=454} [2024-06-21 18:02:15,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 18:02:15,162 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 454 transitions, 5545 flow [2024-06-21 18:02:15,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:15,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:15,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:15,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:02:15,163 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:15,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:15,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1910540776, now seen corresponding path program 6 times [2024-06-21 18:02:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:15,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759344644] [2024-06-21 18:02:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:15,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:15,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759344644] [2024-06-21 18:02:15,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759344644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:15,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:15,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:15,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455700352] [2024-06-21 18:02:15,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:15,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:15,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:15,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:15,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 454 transitions, 5545 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:15,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:15,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:17,066 INFO L124 PetriNetUnfolderBase]: 2651/4449 cut-off events. [2024-06-21 18:02:17,066 INFO L125 PetriNetUnfolderBase]: For 482552/482552 co-relation queries the response was YES. [2024-06-21 18:02:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37467 conditions, 4449 events. 2651/4449 cut-off events. For 482552/482552 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28566 event pairs, 507 based on Foata normal form. 2/4442 useless extension candidates. Maximal degree in co-relation 37316. Up to 3791 conditions per place. [2024-06-21 18:02:17,126 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 378 selfloop transitions, 85 changer transitions 0/470 dead transitions. [2024-06-21 18:02:17,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 470 transitions, 6549 flow [2024-06-21 18:02:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 18:02:17,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 18:02:17,128 INFO L175 Difference]: Start difference. First operand has 334 places, 454 transitions, 5545 flow. Second operand 8 states and 162 transitions. [2024-06-21 18:02:17,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 470 transitions, 6549 flow [2024-06-21 18:02:19,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 470 transitions, 6311 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 18:02:19,180 INFO L231 Difference]: Finished difference. Result has 337 places, 454 transitions, 5485 flow [2024-06-21 18:02:19,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5307, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=337, PETRI_TRANSITIONS=454} [2024-06-21 18:02:19,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-21 18:02:19,181 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 454 transitions, 5485 flow [2024-06-21 18:02:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:02:19,181 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:19,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 294621700, now seen corresponding path program 7 times [2024-06-21 18:02:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327876233] [2024-06-21 18:02:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:19,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:19,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327876233] [2024-06-21 18:02:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327876233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:19,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286475484] [2024-06-21 18:02:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:19,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:19,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 454 transitions, 5485 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:19,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:19,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:19,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:21,024 INFO L124 PetriNetUnfolderBase]: 2677/4478 cut-off events. [2024-06-21 18:02:21,024 INFO L125 PetriNetUnfolderBase]: For 500959/500959 co-relation queries the response was YES. [2024-06-21 18:02:21,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37994 conditions, 4478 events. 2677/4478 cut-off events. For 500959/500959 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28765 event pairs, 529 based on Foata normal form. 2/4468 useless extension candidates. Maximal degree in co-relation 37842. Up to 3558 conditions per place. [2024-06-21 18:02:21,097 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 166 changer transitions 0/476 dead transitions. [2024-06-21 18:02:21,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 476 transitions, 7041 flow [2024-06-21 18:02:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 18:02:21,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 18:02:21,098 INFO L175 Difference]: Start difference. First operand has 337 places, 454 transitions, 5485 flow. Second operand 8 states and 165 transitions. [2024-06-21 18:02:21,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 476 transitions, 7041 flow [2024-06-21 18:02:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 476 transitions, 6803 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:02:23,150 INFO L231 Difference]: Finished difference. Result has 337 places, 460 transitions, 5730 flow [2024-06-21 18:02:23,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5730, PETRI_PLACES=337, PETRI_TRANSITIONS=460} [2024-06-21 18:02:23,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-21 18:02:23,151 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 460 transitions, 5730 flow [2024-06-21 18:02:23,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:23,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:23,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:23,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:02:23,152 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:23,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2004224518, now seen corresponding path program 8 times [2024-06-21 18:02:23,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:23,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531155497] [2024-06-21 18:02:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:23,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531155497] [2024-06-21 18:02:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531155497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:23,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:23,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:23,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320738946] [2024-06-21 18:02:23,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:23,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:23,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:23,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:23,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 460 transitions, 5730 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:23,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:23,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:23,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:25,097 INFO L124 PetriNetUnfolderBase]: 2692/4514 cut-off events. [2024-06-21 18:02:25,098 INFO L125 PetriNetUnfolderBase]: For 510946/510946 co-relation queries the response was YES. [2024-06-21 18:02:25,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38522 conditions, 4514 events. 2692/4514 cut-off events. For 510946/510946 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29018 event pairs, 516 based on Foata normal form. 2/4507 useless extension candidates. Maximal degree in co-relation 38369. Up to 4006 conditions per place. [2024-06-21 18:02:25,175 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-21 18:02:25,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 477 transitions, 6830 flow [2024-06-21 18:02:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:02:25,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:02:25,177 INFO L175 Difference]: Start difference. First operand has 337 places, 460 transitions, 5730 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:02:25,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 477 transitions, 6830 flow [2024-06-21 18:02:27,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 477 transitions, 6416 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 18:02:27,245 INFO L231 Difference]: Finished difference. Result has 340 places, 466 transitions, 5558 flow [2024-06-21 18:02:27,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5558, PETRI_PLACES=340, PETRI_TRANSITIONS=466} [2024-06-21 18:02:27,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-21 18:02:27,246 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 466 transitions, 5558 flow [2024-06-21 18:02:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:27,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:27,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:02:27,247 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:27,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash -109637210, now seen corresponding path program 9 times [2024-06-21 18:02:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:27,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397536741] [2024-06-21 18:02:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:28,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:28,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397536741] [2024-06-21 18:02:28,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397536741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:28,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:28,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:28,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120489325] [2024-06-21 18:02:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:28,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:28,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:28,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 466 transitions, 5558 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:28,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:28,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:28,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:29,378 INFO L124 PetriNetUnfolderBase]: 2702/4532 cut-off events. [2024-06-21 18:02:29,379 INFO L125 PetriNetUnfolderBase]: For 518299/518299 co-relation queries the response was YES. [2024-06-21 18:02:29,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38334 conditions, 4532 events. 2702/4532 cut-off events. For 518299/518299 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 29183 event pairs, 513 based on Foata normal form. 2/4525 useless extension candidates. Maximal degree in co-relation 38180. Up to 3979 conditions per place. [2024-06-21 18:02:29,444 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 63 changer transitions 0/485 dead transitions. [2024-06-21 18:02:29,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 485 transitions, 6854 flow [2024-06-21 18:02:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:02:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:02:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 18:02:29,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:02:29,446 INFO L175 Difference]: Start difference. First operand has 340 places, 466 transitions, 5558 flow. Second operand 10 states and 190 transitions. [2024-06-21 18:02:29,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 485 transitions, 6854 flow [2024-06-21 18:02:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 485 transitions, 6619 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 18:02:31,610 INFO L231 Difference]: Finished difference. Result has 345 places, 469 transitions, 5534 flow [2024-06-21 18:02:31,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5323, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5534, PETRI_PLACES=345, PETRI_TRANSITIONS=469} [2024-06-21 18:02:31,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 18:02:31,611 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 469 transitions, 5534 flow [2024-06-21 18:02:31,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:31,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:31,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:02:31,611 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:31,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1752485608, now seen corresponding path program 10 times [2024-06-21 18:02:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757764495] [2024-06-21 18:02:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:32,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757764495] [2024-06-21 18:02:32,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757764495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:32,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:32,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434673343] [2024-06-21 18:02:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:32,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:32,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 469 transitions, 5534 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:32,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:32,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:33,252 INFO L124 PetriNetUnfolderBase]: 2712/4537 cut-off events. [2024-06-21 18:02:33,252 INFO L125 PetriNetUnfolderBase]: For 527654/527654 co-relation queries the response was YES. [2024-06-21 18:02:33,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38415 conditions, 4537 events. 2712/4537 cut-off events. For 527654/527654 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29252 event pairs, 534 based on Foata normal form. 2/4527 useless extension candidates. Maximal degree in co-relation 38260. Up to 3592 conditions per place. [2024-06-21 18:02:33,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 322 selfloop transitions, 158 changer transitions 0/487 dead transitions. [2024-06-21 18:02:33,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 487 transitions, 6852 flow [2024-06-21 18:02:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 18:02:33,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 18:02:33,315 INFO L175 Difference]: Start difference. First operand has 345 places, 469 transitions, 5534 flow. Second operand 8 states and 164 transitions. [2024-06-21 18:02:33,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 487 transitions, 6852 flow [2024-06-21 18:02:35,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 487 transitions, 6601 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:02:35,505 INFO L231 Difference]: Finished difference. Result has 345 places, 472 transitions, 5680 flow [2024-06-21 18:02:35,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5680, PETRI_PLACES=345, PETRI_TRANSITIONS=472} [2024-06-21 18:02:35,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 18:02:35,506 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 472 transitions, 5680 flow [2024-06-21 18:02:35,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:35,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:35,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:02:35,506 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:35,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash -109904120, now seen corresponding path program 11 times [2024-06-21 18:02:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:35,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323545605] [2024-06-21 18:02:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:36,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:36,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323545605] [2024-06-21 18:02:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323545605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:36,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:36,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396136374] [2024-06-21 18:02:36,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:36,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:36,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:36,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:36,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:36,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:36,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 472 transitions, 5680 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:36,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:36,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:36,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:37,211 INFO L124 PetriNetUnfolderBase]: 2706/4538 cut-off events. [2024-06-21 18:02:37,211 INFO L125 PetriNetUnfolderBase]: For 527008/527008 co-relation queries the response was YES. [2024-06-21 18:02:37,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38393 conditions, 4538 events. 2706/4538 cut-off events. For 527008/527008 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29229 event pairs, 515 based on Foata normal form. 2/4531 useless extension candidates. Maximal degree in co-relation 38238. Up to 3988 conditions per place. [2024-06-21 18:02:37,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 60 changer transitions 0/484 dead transitions. [2024-06-21 18:02:37,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 484 transitions, 6688 flow [2024-06-21 18:02:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:02:37,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:02:37,279 INFO L175 Difference]: Start difference. First operand has 345 places, 472 transitions, 5680 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:02:37,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 484 transitions, 6688 flow [2024-06-21 18:02:39,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 484 transitions, 6158 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 18:02:39,324 INFO L231 Difference]: Finished difference. Result has 346 places, 472 transitions, 5277 flow [2024-06-21 18:02:39,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5277, PETRI_PLACES=346, PETRI_TRANSITIONS=472} [2024-06-21 18:02:39,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 18:02:39,325 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 472 transitions, 5277 flow [2024-06-21 18:02:39,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:39,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:39,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:39,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:02:39,325 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:39,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 37705480, now seen corresponding path program 12 times [2024-06-21 18:02:39,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:39,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175485107] [2024-06-21 18:02:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:39,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:39,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175485107] [2024-06-21 18:02:39,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175485107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:39,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457358438] [2024-06-21 18:02:39,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:39,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:39,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:40,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:40,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 472 transitions, 5277 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:40,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:40,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:40,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:40,989 INFO L124 PetriNetUnfolderBase]: 2700/4521 cut-off events. [2024-06-21 18:02:40,989 INFO L125 PetriNetUnfolderBase]: For 523668/523668 co-relation queries the response was YES. [2024-06-21 18:02:41,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37651 conditions, 4521 events. 2700/4521 cut-off events. For 523668/523668 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29155 event pairs, 538 based on Foata normal form. 2/4511 useless extension candidates. Maximal degree in co-relation 37495. Up to 3582 conditions per place. [2024-06-21 18:02:41,061 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 153 changer transitions 0/486 dead transitions. [2024-06-21 18:02:41,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 486 transitions, 6317 flow [2024-06-21 18:02:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 18:02:41,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 18:02:41,062 INFO L175 Difference]: Start difference. First operand has 346 places, 472 transitions, 5277 flow. Second operand 8 states and 162 transitions. [2024-06-21 18:02:41,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 486 transitions, 6317 flow [2024-06-21 18:02:43,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 486 transitions, 6159 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:02:43,513 INFO L231 Difference]: Finished difference. Result has 347 places, 472 transitions, 5433 flow [2024-06-21 18:02:43,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5433, PETRI_PLACES=347, PETRI_TRANSITIONS=472} [2024-06-21 18:02:43,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 18:02:43,514 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 472 transitions, 5433 flow [2024-06-21 18:02:43,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:43,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:43,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:43,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:02:43,514 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:43,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash 45980778, now seen corresponding path program 1 times [2024-06-21 18:02:43,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:43,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023202356] [2024-06-21 18:02:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:43,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023202356] [2024-06-21 18:02:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023202356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:44,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12472581] [2024-06-21 18:02:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:44,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:44,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:44,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 472 transitions, 5433 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:44,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:44,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:45,172 INFO L124 PetriNetUnfolderBase]: 2708/4542 cut-off events. [2024-06-21 18:02:45,173 INFO L125 PetriNetUnfolderBase]: For 533353/533353 co-relation queries the response was YES. [2024-06-21 18:02:45,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38114 conditions, 4542 events. 2708/4542 cut-off events. For 533353/533353 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29225 event pairs, 423 based on Foata normal form. 2/4535 useless extension candidates. Maximal degree in co-relation 37957. Up to 4042 conditions per place. [2024-06-21 18:02:45,240 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 462 selfloop transitions, 20 changer transitions 0/489 dead transitions. [2024-06-21 18:02:45,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 489 transitions, 6477 flow [2024-06-21 18:02:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:02:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:02:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 18:02:45,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 18:02:45,241 INFO L175 Difference]: Start difference. First operand has 347 places, 472 transitions, 5433 flow. Second operand 7 states and 136 transitions. [2024-06-21 18:02:45,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 489 transitions, 6477 flow [2024-06-21 18:02:47,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 489 transitions, 6048 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:02:47,894 INFO L231 Difference]: Finished difference. Result has 345 places, 474 transitions, 5093 flow [2024-06-21 18:02:47,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5093, PETRI_PLACES=345, PETRI_TRANSITIONS=474} [2024-06-21 18:02:47,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 18:02:47,895 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 474 transitions, 5093 flow [2024-06-21 18:02:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:47,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:47,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:47,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:02:47,895 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:47,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:47,895 INFO L85 PathProgramCache]: Analyzing trace with hash 339416040, now seen corresponding path program 2 times [2024-06-21 18:02:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:47,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692924276] [2024-06-21 18:02:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:47,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:48,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:48,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692924276] [2024-06-21 18:02:48,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692924276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:48,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:48,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:48,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997009198] [2024-06-21 18:02:48,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:48,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:48,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:48,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 474 transitions, 5093 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:48,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:48,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:48,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:49,563 INFO L124 PetriNetUnfolderBase]: 2716/4554 cut-off events. [2024-06-21 18:02:49,563 INFO L125 PetriNetUnfolderBase]: For 540745/540745 co-relation queries the response was YES. [2024-06-21 18:02:49,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37682 conditions, 4554 events. 2716/4554 cut-off events. For 540745/540745 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29353 event pairs, 514 based on Foata normal form. 2/4547 useless extension candidates. Maximal degree in co-relation 37526. Up to 3991 conditions per place. [2024-06-21 18:02:49,636 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 431 selfloop transitions, 52 changer transitions 0/490 dead transitions. [2024-06-21 18:02:49,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 490 transitions, 6385 flow [2024-06-21 18:02:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:02:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:02:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 18:02:49,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 18:02:49,637 INFO L175 Difference]: Start difference. First operand has 345 places, 474 transitions, 5093 flow. Second operand 7 states and 138 transitions. [2024-06-21 18:02:49,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 490 transitions, 6385 flow [2024-06-21 18:02:52,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 490 transitions, 6312 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 18:02:52,243 INFO L231 Difference]: Finished difference. Result has 347 places, 478 transitions, 5223 flow [2024-06-21 18:02:52,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5223, PETRI_PLACES=347, PETRI_TRANSITIONS=478} [2024-06-21 18:02:52,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 18:02:52,244 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 478 transitions, 5223 flow [2024-06-21 18:02:52,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:52,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:52,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:02:52,244 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:52,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1398355440, now seen corresponding path program 3 times [2024-06-21 18:02:52,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:52,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615117076] [2024-06-21 18:02:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:52,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:52,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615117076] [2024-06-21 18:02:52,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615117076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:52,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77166778] [2024-06-21 18:02:52,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:52,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:52,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 478 transitions, 5223 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:53,971 INFO L124 PetriNetUnfolderBase]: 2746/4604 cut-off events. [2024-06-21 18:02:53,972 INFO L125 PetriNetUnfolderBase]: For 550733/550733 co-relation queries the response was YES. [2024-06-21 18:02:54,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38242 conditions, 4604 events. 2746/4604 cut-off events. For 550733/550733 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29630 event pairs, 507 based on Foata normal form. 2/4598 useless extension candidates. Maximal degree in co-relation 38085. Up to 4128 conditions per place. [2024-06-21 18:02:54,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 33 changer transitions 0/506 dead transitions. [2024-06-21 18:02:54,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 506 transitions, 6457 flow [2024-06-21 18:02:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:02:54,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:02:54,038 INFO L175 Difference]: Start difference. First operand has 347 places, 478 transitions, 5223 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:02:54,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 506 transitions, 6457 flow [2024-06-21 18:02:56,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 506 transitions, 6336 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 18:02:56,997 INFO L231 Difference]: Finished difference. Result has 355 places, 490 transitions, 5391 flow [2024-06-21 18:02:56,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5391, PETRI_PLACES=355, PETRI_TRANSITIONS=490} [2024-06-21 18:02:56,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 18:02:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 490 transitions, 5391 flow [2024-06-21 18:02:56,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:56,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:56,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:02:56,998 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:56,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash 289857124, now seen corresponding path program 4 times [2024-06-21 18:02:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533382121] [2024-06-21 18:02:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:56,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:57,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533382121] [2024-06-21 18:02:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533382121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:57,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:57,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:57,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266533347] [2024-06-21 18:02:57,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:57,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:57,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:57,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:02:57,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 490 transitions, 5391 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:57,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:57,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:02:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:58,716 INFO L124 PetriNetUnfolderBase]: 2754/4612 cut-off events. [2024-06-21 18:02:58,716 INFO L125 PetriNetUnfolderBase]: For 560745/560745 co-relation queries the response was YES. [2024-06-21 18:02:58,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38430 conditions, 4612 events. 2754/4612 cut-off events. For 560745/560745 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29697 event pairs, 516 based on Foata normal form. 2/4604 useless extension candidates. Maximal degree in co-relation 38269. Up to 4087 conditions per place. [2024-06-21 18:02:58,790 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 64 changer transitions 0/503 dead transitions. [2024-06-21 18:02:58,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 503 transitions, 6451 flow [2024-06-21 18:02:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 18:02:58,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 18:02:58,791 INFO L175 Difference]: Start difference. First operand has 355 places, 490 transitions, 5391 flow. Second operand 8 states and 154 transitions. [2024-06-21 18:02:58,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 503 transitions, 6451 flow [2024-06-21 18:03:01,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 503 transitions, 6394 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 18:03:01,276 INFO L231 Difference]: Finished difference. Result has 361 places, 492 transitions, 5511 flow [2024-06-21 18:03:01,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5511, PETRI_PLACES=361, PETRI_TRANSITIONS=492} [2024-06-21 18:03:01,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 18:03:01,276 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 492 transitions, 5511 flow [2024-06-21 18:03:01,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:01,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:01,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:01,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:03:01,277 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:01,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1604724232, now seen corresponding path program 5 times [2024-06-21 18:03:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:01,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226304461] [2024-06-21 18:03:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:01,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226304461] [2024-06-21 18:03:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226304461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:01,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207499113] [2024-06-21 18:03:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:02,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:02,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 492 transitions, 5511 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:02,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:02,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:02,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:03,021 INFO L124 PetriNetUnfolderBase]: 2762/4624 cut-off events. [2024-06-21 18:03:03,022 INFO L125 PetriNetUnfolderBase]: For 570935/570935 co-relation queries the response was YES. [2024-06-21 18:03:03,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 4624 events. 2762/4624 cut-off events. For 570935/570935 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 29804 event pairs, 516 based on Foata normal form. 2/4616 useless extension candidates. Maximal degree in co-relation 38514. Up to 4099 conditions per place. [2024-06-21 18:03:03,087 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 58 changer transitions 0/505 dead transitions. [2024-06-21 18:03:03,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 505 transitions, 6579 flow [2024-06-21 18:03:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:03:03,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 18:03:03,088 INFO L175 Difference]: Start difference. First operand has 361 places, 492 transitions, 5511 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:03:03,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 505 transitions, 6579 flow [2024-06-21 18:03:05,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 505 transitions, 6422 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:05,803 INFO L231 Difference]: Finished difference. Result has 363 places, 494 transitions, 5523 flow [2024-06-21 18:03:05,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5523, PETRI_PLACES=363, PETRI_TRANSITIONS=494} [2024-06-21 18:03:05,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 18:03:05,804 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 494 transitions, 5523 flow [2024-06-21 18:03:05,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:05,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:05,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:05,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:03:05,805 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:05,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash 68020530, now seen corresponding path program 1 times [2024-06-21 18:03:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:05,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63135178] [2024-06-21 18:03:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63135178] [2024-06-21 18:03:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63135178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:06,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962925670] [2024-06-21 18:03:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:06,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:06,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 494 transitions, 5523 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:06,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:06,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:07,756 INFO L124 PetriNetUnfolderBase]: 2770/4641 cut-off events. [2024-06-21 18:03:07,756 INFO L125 PetriNetUnfolderBase]: For 580149/580149 co-relation queries the response was YES. [2024-06-21 18:03:07,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38844 conditions, 4641 events. 2770/4641 cut-off events. For 580149/580149 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29864 event pairs, 510 based on Foata normal form. 2/4637 useless extension candidates. Maximal degree in co-relation 38680. Up to 4146 conditions per place. [2024-06-21 18:03:07,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 469 selfloop transitions, 36 changer transitions 0/512 dead transitions. [2024-06-21 18:03:07,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 512 transitions, 6630 flow [2024-06-21 18:03:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:07,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:07,829 INFO L175 Difference]: Start difference. First operand has 363 places, 494 transitions, 5523 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:07,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 512 transitions, 6630 flow [2024-06-21 18:03:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 512 transitions, 6481 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:10,573 INFO L231 Difference]: Finished difference. Result has 366 places, 496 transitions, 5507 flow [2024-06-21 18:03:10,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5507, PETRI_PLACES=366, PETRI_TRANSITIONS=496} [2024-06-21 18:03:10,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 18:03:10,574 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 496 transitions, 5507 flow [2024-06-21 18:03:10,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:10,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:10,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:10,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:03:10,575 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:10,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 83675220, now seen corresponding path program 2 times [2024-06-21 18:03:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702746992] [2024-06-21 18:03:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:11,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702746992] [2024-06-21 18:03:11,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702746992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:11,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:11,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:11,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950181589] [2024-06-21 18:03:11,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:11,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:11,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 496 transitions, 5507 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:12,521 INFO L124 PetriNetUnfolderBase]: 2778/4657 cut-off events. [2024-06-21 18:03:12,522 INFO L125 PetriNetUnfolderBase]: For 591421/591421 co-relation queries the response was YES. [2024-06-21 18:03:12,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39160 conditions, 4657 events. 2778/4657 cut-off events. For 591421/591421 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29989 event pairs, 512 based on Foata normal form. 2/4653 useless extension candidates. Maximal degree in co-relation 38995. Up to 4149 conditions per place. [2024-06-21 18:03:12,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 40 changer transitions 0/514 dead transitions. [2024-06-21 18:03:12,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 514 transitions, 6622 flow [2024-06-21 18:03:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:12,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:12,594 INFO L175 Difference]: Start difference. First operand has 366 places, 496 transitions, 5507 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:12,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 514 transitions, 6622 flow [2024-06-21 18:03:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 514 transitions, 6505 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:15,769 INFO L231 Difference]: Finished difference. Result has 368 places, 498 transitions, 5535 flow [2024-06-21 18:03:15,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5535, PETRI_PLACES=368, PETRI_TRANSITIONS=498} [2024-06-21 18:03:15,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 18:03:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 498 transitions, 5535 flow [2024-06-21 18:03:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:15,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:15,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:03:15,770 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:15,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -246584282, now seen corresponding path program 3 times [2024-06-21 18:03:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858717667] [2024-06-21 18:03:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:16,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:16,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858717667] [2024-06-21 18:03:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858717667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:16,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712279717] [2024-06-21 18:03:16,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:16,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:16,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 498 transitions, 5535 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:16,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:16,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:16,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:17,731 INFO L124 PetriNetUnfolderBase]: 2786/4669 cut-off events. [2024-06-21 18:03:17,731 INFO L125 PetriNetUnfolderBase]: For 603160/603160 co-relation queries the response was YES. [2024-06-21 18:03:17,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39512 conditions, 4669 events. 2786/4669 cut-off events. For 603160/603160 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30048 event pairs, 510 based on Foata normal form. 2/4665 useless extension candidates. Maximal degree in co-relation 39346. Up to 4135 conditions per place. [2024-06-21 18:03:17,805 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 46 changer transitions 0/517 dead transitions. [2024-06-21 18:03:17,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 517 transitions, 6662 flow [2024-06-21 18:03:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:03:17,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 18:03:17,806 INFO L175 Difference]: Start difference. First operand has 368 places, 498 transitions, 5535 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:03:17,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 517 transitions, 6662 flow [2024-06-21 18:03:20,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 517 transitions, 6533 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:20,924 INFO L231 Difference]: Finished difference. Result has 370 places, 500 transitions, 5567 flow [2024-06-21 18:03:20,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5567, PETRI_PLACES=370, PETRI_TRANSITIONS=500} [2024-06-21 18:03:20,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 18:03:20,924 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 500 transitions, 5567 flow [2024-06-21 18:03:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:20,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:20,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:20,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:03:20,925 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:20,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1229555652, now seen corresponding path program 4 times [2024-06-21 18:03:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313827710] [2024-06-21 18:03:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:21,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:21,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313827710] [2024-06-21 18:03:21,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313827710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:21,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:21,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:21,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117768896] [2024-06-21 18:03:21,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:21,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:21,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:21,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 500 transitions, 5567 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:21,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:21,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:21,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:22,920 INFO L124 PetriNetUnfolderBase]: 2794/4678 cut-off events. [2024-06-21 18:03:22,920 INFO L125 PetriNetUnfolderBase]: For 614710/614710 co-relation queries the response was YES. [2024-06-21 18:03:22,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39879 conditions, 4678 events. 2794/4678 cut-off events. For 614710/614710 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30175 event pairs, 526 based on Foata normal form. 2/4672 useless extension candidates. Maximal degree in co-relation 39712. Up to 4119 conditions per place. [2024-06-21 18:03:22,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 62 changer transitions 0/515 dead transitions. [2024-06-21 18:03:22,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 515 transitions, 6682 flow [2024-06-21 18:03:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:22,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:22,992 INFO L175 Difference]: Start difference. First operand has 370 places, 500 transitions, 5567 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 515 transitions, 6682 flow [2024-06-21 18:03:26,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 515 transitions, 6537 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:26,402 INFO L231 Difference]: Finished difference. Result has 372 places, 502 transitions, 5619 flow [2024-06-21 18:03:26,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5619, PETRI_PLACES=372, PETRI_TRANSITIONS=502} [2024-06-21 18:03:26,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 18:03:26,403 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 502 transitions, 5619 flow [2024-06-21 18:03:26,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:26,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:26,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:26,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:03:26,403 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:26,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1239078852, now seen corresponding path program 5 times [2024-06-21 18:03:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:26,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635008341] [2024-06-21 18:03:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635008341] [2024-06-21 18:03:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635008341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859201126] [2024-06-21 18:03:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:27,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:27,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 502 transitions, 5619 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:27,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:27,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:27,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:28,423 INFO L124 PetriNetUnfolderBase]: 2815/4709 cut-off events. [2024-06-21 18:03:28,423 INFO L125 PetriNetUnfolderBase]: For 640875/640875 co-relation queries the response was YES. [2024-06-21 18:03:28,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40700 conditions, 4709 events. 2815/4709 cut-off events. For 640875/640875 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30338 event pairs, 525 based on Foata normal form. 2/4703 useless extension candidates. Maximal degree in co-relation 40532. Up to 4107 conditions per place. [2024-06-21 18:03:28,496 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 79 changer transitions 0/522 dead transitions. [2024-06-21 18:03:28,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 522 transitions, 7061 flow [2024-06-21 18:03:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:03:28,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:03:28,498 INFO L175 Difference]: Start difference. First operand has 372 places, 502 transitions, 5619 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:03:28,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 522 transitions, 7061 flow [2024-06-21 18:03:32,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 522 transitions, 6880 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:32,079 INFO L231 Difference]: Finished difference. Result has 375 places, 507 transitions, 5768 flow [2024-06-21 18:03:32,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5768, PETRI_PLACES=375, PETRI_TRANSITIONS=507} [2024-06-21 18:03:32,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 18:03:32,080 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 507 transitions, 5768 flow [2024-06-21 18:03:32,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:32,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:32,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:32,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:03:32,080 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:32,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 824768356, now seen corresponding path program 6 times [2024-06-21 18:03:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759705133] [2024-06-21 18:03:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759705133] [2024-06-21 18:03:32,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759705133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:32,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:32,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405029917] [2024-06-21 18:03:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:33,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:33,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 507 transitions, 5768 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:33,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:33,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:33,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:34,275 INFO L124 PetriNetUnfolderBase]: 2823/4725 cut-off events. [2024-06-21 18:03:34,276 INFO L125 PetriNetUnfolderBase]: For 654509/654509 co-relation queries the response was YES. [2024-06-21 18:03:34,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 4725 events. 2823/4725 cut-off events. For 654509/654509 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30519 event pairs, 529 based on Foata normal form. 2/4719 useless extension candidates. Maximal degree in co-relation 40979. Up to 4142 conditions per place. [2024-06-21 18:03:34,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 446 selfloop transitions, 69 changer transitions 0/522 dead transitions. [2024-06-21 18:03:34,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 522 transitions, 6905 flow [2024-06-21 18:03:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:34,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:34,352 INFO L175 Difference]: Start difference. First operand has 375 places, 507 transitions, 5768 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:34,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 522 transitions, 6905 flow [2024-06-21 18:03:37,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 522 transitions, 6725 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 18:03:37,972 INFO L231 Difference]: Finished difference. Result has 379 places, 509 transitions, 5807 flow [2024-06-21 18:03:37,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5588, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5807, PETRI_PLACES=379, PETRI_TRANSITIONS=509} [2024-06-21 18:03:37,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 18:03:37,973 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 509 transitions, 5807 flow [2024-06-21 18:03:37,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:37,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:37,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:37,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:03:37,973 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:37,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash 809113666, now seen corresponding path program 7 times [2024-06-21 18:03:37,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:37,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237698283] [2024-06-21 18:03:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:37,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:38,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:38,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237698283] [2024-06-21 18:03:38,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237698283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:38,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:38,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:38,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519282182] [2024-06-21 18:03:38,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:38,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:38,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 509 transitions, 5807 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:38,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:38,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:38,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:40,009 INFO L124 PetriNetUnfolderBase]: 2831/4733 cut-off events. [2024-06-21 18:03:40,009 INFO L125 PetriNetUnfolderBase]: For 665409/665409 co-relation queries the response was YES. [2024-06-21 18:03:40,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41505 conditions, 4733 events. 2831/4733 cut-off events. For 665409/665409 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30529 event pairs, 527 based on Foata normal form. 2/4727 useless extension candidates. Maximal degree in co-relation 41333. Up to 4174 conditions per place. [2024-06-21 18:03:40,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 458 selfloop transitions, 59 changer transitions 0/524 dead transitions. [2024-06-21 18:03:40,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 524 transitions, 6928 flow [2024-06-21 18:03:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:40,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:40,090 INFO L175 Difference]: Start difference. First operand has 379 places, 509 transitions, 5807 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:40,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 524 transitions, 6928 flow [2024-06-21 18:03:44,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 524 transitions, 6725 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:44,296 INFO L231 Difference]: Finished difference. Result has 381 places, 511 transitions, 5783 flow [2024-06-21 18:03:44,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5783, PETRI_PLACES=381, PETRI_TRANSITIONS=511} [2024-06-21 18:03:44,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 18:03:44,296 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 511 transitions, 5783 flow [2024-06-21 18:03:44,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:44,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:44,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:03:44,297 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:44,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1292978908, now seen corresponding path program 8 times [2024-06-21 18:03:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473283543] [2024-06-21 18:03:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473283543] [2024-06-21 18:03:45,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473283543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:45,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:45,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070128367] [2024-06-21 18:03:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:45,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:45,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:45,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 511 transitions, 5783 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:45,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:45,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:46,293 INFO L124 PetriNetUnfolderBase]: 2826/4726 cut-off events. [2024-06-21 18:03:46,293 INFO L125 PetriNetUnfolderBase]: For 661489/661489 co-relation queries the response was YES. [2024-06-21 18:03:46,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41163 conditions, 4726 events. 2826/4726 cut-off events. For 661489/661489 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30530 event pairs, 526 based on Foata normal form. 2/4720 useless extension candidates. Maximal degree in co-relation 40990. Up to 4155 conditions per place. [2024-06-21 18:03:46,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 73 changer transitions 0/525 dead transitions. [2024-06-21 18:03:46,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 525 transitions, 6891 flow [2024-06-21 18:03:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:46,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:46,369 INFO L175 Difference]: Start difference. First operand has 381 places, 511 transitions, 5783 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:46,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 525 transitions, 6891 flow [2024-06-21 18:03:49,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 525 transitions, 6668 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:49,510 INFO L231 Difference]: Finished difference. Result has 383 places, 512 transitions, 5750 flow [2024-06-21 18:03:49,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5750, PETRI_PLACES=383, PETRI_TRANSITIONS=512} [2024-06-21 18:03:49,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 18:03:49,511 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 512 transitions, 5750 flow [2024-06-21 18:03:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:49,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:49,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:49,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:03:49,511 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:49,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1072929734, now seen corresponding path program 9 times [2024-06-21 18:03:49,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:49,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806897709] [2024-06-21 18:03:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:49,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:50,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:50,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806897709] [2024-06-21 18:03:50,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806897709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:50,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:50,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951442774] [2024-06-21 18:03:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:50,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:50,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:50,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:50,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 512 transitions, 5750 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:50,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:50,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:50,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:51,441 INFO L124 PetriNetUnfolderBase]: 2834/4742 cut-off events. [2024-06-21 18:03:51,442 INFO L125 PetriNetUnfolderBase]: For 671372/671372 co-relation queries the response was YES. [2024-06-21 18:03:51,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41249 conditions, 4742 events. 2834/4742 cut-off events. For 671372/671372 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30635 event pairs, 528 based on Foata normal form. 2/4736 useless extension candidates. Maximal degree in co-relation 41075. Up to 4120 conditions per place. [2024-06-21 18:03:51,520 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 93 changer transitions 0/527 dead transitions. [2024-06-21 18:03:51,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 527 transitions, 6901 flow [2024-06-21 18:03:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:51,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:03:51,521 INFO L175 Difference]: Start difference. First operand has 383 places, 512 transitions, 5750 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:51,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 527 transitions, 6901 flow [2024-06-21 18:03:54,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 527 transitions, 6746 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:54,862 INFO L231 Difference]: Finished difference. Result has 385 places, 514 transitions, 5866 flow [2024-06-21 18:03:54,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5866, PETRI_PLACES=385, PETRI_TRANSITIONS=514} [2024-06-21 18:03:54,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-21 18:03:54,862 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 514 transitions, 5866 flow [2024-06-21 18:03:54,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:54,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:54,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:54,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:03:54,862 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:54,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -858551132, now seen corresponding path program 10 times [2024-06-21 18:03:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:54,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014690581] [2024-06-21 18:03:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:54,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:55,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:55,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014690581] [2024-06-21 18:03:55,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014690581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:55,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:55,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091831353] [2024-06-21 18:03:55,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:55,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:55,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:55,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:03:55,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 514 transitions, 5866 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:55,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:55,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:03:55,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:56,804 INFO L124 PetriNetUnfolderBase]: 2842/4758 cut-off events. [2024-06-21 18:03:56,804 INFO L125 PetriNetUnfolderBase]: For 685843/685843 co-relation queries the response was YES. [2024-06-21 18:03:56,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41761 conditions, 4758 events. 2842/4758 cut-off events. For 685843/685843 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30812 event pairs, 528 based on Foata normal form. 2/4752 useless extension candidates. Maximal degree in co-relation 41586. Up to 4123 conditions per place. [2024-06-21 18:03:56,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 79 changer transitions 0/530 dead transitions. [2024-06-21 18:03:56,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 530 transitions, 7029 flow [2024-06-21 18:03:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:03:56,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 18:03:56,882 INFO L175 Difference]: Start difference. First operand has 385 places, 514 transitions, 5866 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:03:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 530 transitions, 7029 flow [2024-06-21 18:04:00,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 530 transitions, 6774 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 18:04:00,592 INFO L231 Difference]: Finished difference. Result has 387 places, 516 transitions, 5859 flow [2024-06-21 18:04:00,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5611, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5859, PETRI_PLACES=387, PETRI_TRANSITIONS=516} [2024-06-21 18:04:00,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 18:04:00,593 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 516 transitions, 5859 flow [2024-06-21 18:04:00,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:00,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:00,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:00,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:04:00,593 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:00,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash -305068642, now seen corresponding path program 11 times [2024-06-21 18:04:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:00,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919288968] [2024-06-21 18:04:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919288968] [2024-06-21 18:04:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919288968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694262580] [2024-06-21 18:04:01,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:01,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:01,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:01,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 516 transitions, 5859 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:01,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:01,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:01,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:02,599 INFO L124 PetriNetUnfolderBase]: 2863/4793 cut-off events. [2024-06-21 18:04:02,599 INFO L125 PetriNetUnfolderBase]: For 714477/714477 co-relation queries the response was YES. [2024-06-21 18:04:02,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42611 conditions, 4793 events. 2863/4793 cut-off events. For 714477/714477 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 31106 event pairs, 531 based on Foata normal form. 2/4787 useless extension candidates. Maximal degree in co-relation 42435. Up to 4128 conditions per place. [2024-06-21 18:04:02,675 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 101 changer transitions 0/535 dead transitions. [2024-06-21 18:04:02,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 535 transitions, 7358 flow [2024-06-21 18:04:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:04:02,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:04:02,676 INFO L175 Difference]: Start difference. First operand has 387 places, 516 transitions, 5859 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:04:02,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 535 transitions, 7358 flow [2024-06-21 18:04:07,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 535 transitions, 7145 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:07,102 INFO L231 Difference]: Finished difference. Result has 390 places, 520 transitions, 6025 flow [2024-06-21 18:04:07,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6025, PETRI_PLACES=390, PETRI_TRANSITIONS=520} [2024-06-21 18:04:07,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 18:04:07,102 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 520 transitions, 6025 flow [2024-06-21 18:04:07,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:07,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:07,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:07,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:04:07,103 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:07,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash 866602724, now seen corresponding path program 12 times [2024-06-21 18:04:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:07,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693821207] [2024-06-21 18:04:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:07,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693821207] [2024-06-21 18:04:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693821207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:07,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:07,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354799048] [2024-06-21 18:04:07,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:07,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:07,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:07,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 520 transitions, 6025 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:07,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:07,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:07,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:09,129 INFO L124 PetriNetUnfolderBase]: 2871/4807 cut-off events. [2024-06-21 18:04:09,129 INFO L125 PetriNetUnfolderBase]: For 728610/728610 co-relation queries the response was YES. [2024-06-21 18:04:09,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43017 conditions, 4807 events. 2871/4807 cut-off events. For 728610/728610 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 31224 event pairs, 531 based on Foata normal form. 2/4801 useless extension candidates. Maximal degree in co-relation 42840. Up to 4140 conditions per place. [2024-06-21 18:04:09,208 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 104 changer transitions 0/539 dead transitions. [2024-06-21 18:04:09,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 539 transitions, 7523 flow [2024-06-21 18:04:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:04:09,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:04:09,210 INFO L175 Difference]: Start difference. First operand has 390 places, 520 transitions, 6025 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:04:09,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 539 transitions, 7523 flow [2024-06-21 18:04:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 539 transitions, 7317 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:13,219 INFO L231 Difference]: Finished difference. Result has 395 places, 524 transitions, 6210 flow [2024-06-21 18:04:13,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6210, PETRI_PLACES=395, PETRI_TRANSITIONS=524} [2024-06-21 18:04:13,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 18:04:13,220 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 524 transitions, 6210 flow [2024-06-21 18:04:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:13,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:13,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:04:13,221 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:13,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1387163714, now seen corresponding path program 13 times [2024-06-21 18:04:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:13,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893628787] [2024-06-21 18:04:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:14,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893628787] [2024-06-21 18:04:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893628787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385098876] [2024-06-21 18:04:14,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:14,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:14,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 524 transitions, 6210 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:14,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:14,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:14,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:15,304 INFO L124 PetriNetUnfolderBase]: 2879/4829 cut-off events. [2024-06-21 18:04:15,305 INFO L125 PetriNetUnfolderBase]: For 742707/742707 co-relation queries the response was YES. [2024-06-21 18:04:15,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43630 conditions, 4829 events. 2879/4829 cut-off events. For 742707/742707 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 31457 event pairs, 512 based on Foata normal form. 2/4823 useless extension candidates. Maximal degree in co-relation 43450. Up to 3983 conditions per place. [2024-06-21 18:04:15,377 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 136 changer transitions 0/547 dead transitions. [2024-06-21 18:04:15,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 547 transitions, 8068 flow [2024-06-21 18:04:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:04:15,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:04:15,378 INFO L175 Difference]: Start difference. First operand has 395 places, 524 transitions, 6210 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:04:15,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 547 transitions, 8068 flow [2024-06-21 18:04:19,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 547 transitions, 7846 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:19,060 INFO L231 Difference]: Finished difference. Result has 400 places, 530 transitions, 6579 flow [2024-06-21 18:04:19,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6579, PETRI_PLACES=400, PETRI_TRANSITIONS=530} [2024-06-21 18:04:19,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 18:04:19,061 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 530 transitions, 6579 flow [2024-06-21 18:04:19,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:19,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:19,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:04:19,061 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:19,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash -382738492, now seen corresponding path program 14 times [2024-06-21 18:04:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:19,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399310672] [2024-06-21 18:04:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399310672] [2024-06-21 18:04:19,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399310672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:19,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127007486] [2024-06-21 18:04:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:19,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:19,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 530 transitions, 6579 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:19,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:19,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:21,147 INFO L124 PetriNetUnfolderBase]: 2874/4818 cut-off events. [2024-06-21 18:04:21,148 INFO L125 PetriNetUnfolderBase]: For 739577/739577 co-relation queries the response was YES. [2024-06-21 18:04:21,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43943 conditions, 4818 events. 2874/4818 cut-off events. For 739577/739577 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31345 event pairs, 512 based on Foata normal form. 2/4812 useless extension candidates. Maximal degree in co-relation 43760. Up to 3979 conditions per place. [2024-06-21 18:04:21,218 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 138 changer transitions 0/546 dead transitions. [2024-06-21 18:04:21,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 546 transitions, 7940 flow [2024-06-21 18:04:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:04:21,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 18:04:21,219 INFO L175 Difference]: Start difference. First operand has 400 places, 530 transitions, 6579 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:04:21,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 546 transitions, 7940 flow [2024-06-21 18:04:25,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 546 transitions, 7650 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-21 18:04:25,379 INFO L231 Difference]: Finished difference. Result has 405 places, 530 transitions, 6570 flow [2024-06-21 18:04:25,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6570, PETRI_PLACES=405, PETRI_TRANSITIONS=530} [2024-06-21 18:04:25,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 18:04:25,379 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 530 transitions, 6570 flow [2024-06-21 18:04:25,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:25,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:25,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:25,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:04:25,380 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:25,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -697657882, now seen corresponding path program 15 times [2024-06-21 18:04:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:25,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827233997] [2024-06-21 18:04:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:25,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:26,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:26,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827233997] [2024-06-21 18:04:26,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827233997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:26,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:26,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744598518] [2024-06-21 18:04:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:26,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:26,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 530 transitions, 6570 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:26,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:26,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:26,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:27,551 INFO L124 PetriNetUnfolderBase]: 2869/4807 cut-off events. [2024-06-21 18:04:27,552 INFO L125 PetriNetUnfolderBase]: For 725984/725984 co-relation queries the response was YES. [2024-06-21 18:04:27,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43398 conditions, 4807 events. 2869/4807 cut-off events. For 725984/725984 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31213 event pairs, 535 based on Foata normal form. 2/4801 useless extension candidates. Maximal degree in co-relation 43213. Up to 4173 conditions per place. [2024-06-21 18:04:27,621 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 95 changer transitions 0/543 dead transitions. [2024-06-21 18:04:27,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 543 transitions, 7677 flow [2024-06-21 18:04:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:04:27,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:04:27,622 INFO L175 Difference]: Start difference. First operand has 405 places, 530 transitions, 6570 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:04:27,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 543 transitions, 7677 flow [2024-06-21 18:04:32,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 543 transitions, 7133 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-21 18:04:32,033 INFO L231 Difference]: Finished difference. Result has 405 places, 530 transitions, 6221 flow [2024-06-21 18:04:32,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6221, PETRI_PLACES=405, PETRI_TRANSITIONS=530} [2024-06-21 18:04:32,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 18:04:32,034 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 530 transitions, 6221 flow [2024-06-21 18:04:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:32,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:32,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:32,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:04:32,034 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:32,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:32,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1158656892, now seen corresponding path program 6 times [2024-06-21 18:04:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:32,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457297972] [2024-06-21 18:04:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:32,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457297972] [2024-06-21 18:04:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457297972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:32,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:04:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832280953] [2024-06-21 18:04:32,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:32,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:04:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:04:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:04:32,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:32,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 530 transitions, 6221 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:32,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:32,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:32,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:33,744 INFO L124 PetriNetUnfolderBase]: 2864/4806 cut-off events. [2024-06-21 18:04:33,744 INFO L125 PetriNetUnfolderBase]: For 718839/718839 co-relation queries the response was YES. [2024-06-21 18:04:33,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42288 conditions, 4806 events. 2864/4806 cut-off events. For 718839/718839 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31259 event pairs, 528 based on Foata normal form. 2/4798 useless extension candidates. Maximal degree in co-relation 42104. Up to 4235 conditions per place. [2024-06-21 18:04:33,822 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 464 selfloop transitions, 69 changer transitions 0/540 dead transitions. [2024-06-21 18:04:33,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 540 transitions, 7313 flow [2024-06-21 18:04:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:04:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:04:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 18:04:33,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 18:04:33,823 INFO L175 Difference]: Start difference. First operand has 405 places, 530 transitions, 6221 flow. Second operand 7 states and 138 transitions. [2024-06-21 18:04:33,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 540 transitions, 7313 flow [2024-06-21 18:04:37,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 540 transitions, 7089 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:04:37,016 INFO L231 Difference]: Finished difference. Result has 404 places, 530 transitions, 6149 flow [2024-06-21 18:04:37,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6149, PETRI_PLACES=404, PETRI_TRANSITIONS=530} [2024-06-21 18:04:37,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 18:04:37,016 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 530 transitions, 6149 flow [2024-06-21 18:04:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:37,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:37,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:37,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:04:37,017 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:37,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash -661120118, now seen corresponding path program 1 times [2024-06-21 18:04:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:37,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113083325] [2024-06-21 18:04:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:37,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113083325] [2024-06-21 18:04:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113083325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:37,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:37,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173992792] [2024-06-21 18:04:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:37,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:37,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 530 transitions, 6149 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:37,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:37,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:37,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:39,093 INFO L124 PetriNetUnfolderBase]: 2909/4882 cut-off events. [2024-06-21 18:04:39,093 INFO L125 PetriNetUnfolderBase]: For 776421/776421 co-relation queries the response was YES. [2024-06-21 18:04:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43736 conditions, 4882 events. 2909/4882 cut-off events. For 776421/776421 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31734 event pairs, 430 based on Foata normal form. 4/4880 useless extension candidates. Maximal degree in co-relation 43551. Up to 4193 conditions per place. [2024-06-21 18:04:39,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 45 changer transitions 0/561 dead transitions. [2024-06-21 18:04:39,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 561 transitions, 7818 flow [2024-06-21 18:04:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:04:39,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:04:39,172 INFO L175 Difference]: Start difference. First operand has 404 places, 530 transitions, 6149 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:04:39,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 561 transitions, 7818 flow [2024-06-21 18:04:43,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 561 transitions, 7647 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:43,736 INFO L231 Difference]: Finished difference. Result has 408 places, 536 transitions, 6341 flow [2024-06-21 18:04:43,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6341, PETRI_PLACES=408, PETRI_TRANSITIONS=536} [2024-06-21 18:04:43,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-21 18:04:43,736 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 536 transitions, 6341 flow [2024-06-21 18:04:43,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:43,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:43,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:43,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:04:43,737 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:43,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1119515438, now seen corresponding path program 2 times [2024-06-21 18:04:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043820621] [2024-06-21 18:04:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:44,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:44,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043820621] [2024-06-21 18:04:44,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043820621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:44,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:44,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:44,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706298637] [2024-06-21 18:04:44,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:44,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:44,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:44,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:44,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 536 transitions, 6341 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:44,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:44,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:44,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:46,128 INFO L124 PetriNetUnfolderBase]: 2925/4906 cut-off events. [2024-06-21 18:04:46,128 INFO L125 PetriNetUnfolderBase]: For 758676/758676 co-relation queries the response was YES. [2024-06-21 18:04:46,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44102 conditions, 4906 events. 2925/4906 cut-off events. For 758676/758676 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31973 event pairs, 529 based on Foata normal form. 4/4904 useless extension candidates. Maximal degree in co-relation 43915. Up to 4335 conditions per place. [2024-06-21 18:04:46,198 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 500 selfloop transitions, 51 changer transitions 0/558 dead transitions. [2024-06-21 18:04:46,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 558 transitions, 7630 flow [2024-06-21 18:04:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:04:46,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 18:04:46,199 INFO L175 Difference]: Start difference. First operand has 408 places, 536 transitions, 6341 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:04:46,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 558 transitions, 7630 flow [2024-06-21 18:04:50,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 558 transitions, 7429 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:50,611 INFO L231 Difference]: Finished difference. Result has 412 places, 539 transitions, 6386 flow [2024-06-21 18:04:50,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6386, PETRI_PLACES=412, PETRI_TRANSITIONS=539} [2024-06-21 18:04:50,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 18:04:50,612 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 539 transitions, 6386 flow [2024-06-21 18:04:50,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:50,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:50,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:50,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:04:50,612 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:50,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash -659246168, now seen corresponding path program 3 times [2024-06-21 18:04:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:50,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156442111] [2024-06-21 18:04:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:51,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:51,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156442111] [2024-06-21 18:04:51,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156442111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:51,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591321857] [2024-06-21 18:04:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:51,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:51,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 539 transitions, 6386 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:51,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:51,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:51,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:52,968 INFO L124 PetriNetUnfolderBase]: 2970/4977 cut-off events. [2024-06-21 18:04:52,968 INFO L125 PetriNetUnfolderBase]: For 804034/804034 co-relation queries the response was YES. [2024-06-21 18:04:53,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45516 conditions, 4977 events. 2970/4977 cut-off events. For 804034/804034 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32426 event pairs, 527 based on Foata normal form. 4/4975 useless extension candidates. Maximal degree in co-relation 45327. Up to 4341 conditions per place. [2024-06-21 18:04:53,043 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 51 changer transitions 0/566 dead transitions. [2024-06-21 18:04:53,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 566 transitions, 8073 flow [2024-06-21 18:04:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:04:53,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:04:53,044 INFO L175 Difference]: Start difference. First operand has 412 places, 539 transitions, 6386 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:04:53,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 566 transitions, 8073 flow [2024-06-21 18:04:57,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 566 transitions, 7849 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 18:04:57,956 INFO L231 Difference]: Finished difference. Result has 415 places, 545 transitions, 6556 flow [2024-06-21 18:04:57,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6556, PETRI_PLACES=415, PETRI_TRANSITIONS=545} [2024-06-21 18:04:57,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 18:04:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 545 transitions, 6556 flow [2024-06-21 18:04:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:57,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:57,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:57,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:04:57,957 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:57,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -572400536, now seen corresponding path program 1 times [2024-06-21 18:04:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:57,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863995918] [2024-06-21 18:04:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863995918] [2024-06-21 18:04:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863995918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:59,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:59,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:04:59,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050691123] [2024-06-21 18:04:59,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:59,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:04:59,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:04:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:04:59,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:04:59,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 545 transitions, 6556 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:59,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:59,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:04:59,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:00,607 INFO L124 PetriNetUnfolderBase]: 3026/5067 cut-off events. [2024-06-21 18:05:00,607 INFO L125 PetriNetUnfolderBase]: For 923879/923879 co-relation queries the response was YES. [2024-06-21 18:05:00,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46948 conditions, 5067 events. 3026/5067 cut-off events. For 923879/923879 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33150 event pairs, 540 based on Foata normal form. 16/5077 useless extension candidates. Maximal degree in co-relation 46757. Up to 4412 conditions per place. [2024-06-21 18:05:00,692 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 505 selfloop transitions, 58 changer transitions 0/570 dead transitions. [2024-06-21 18:05:00,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 570 transitions, 7925 flow [2024-06-21 18:05:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:05:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:05:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:05:00,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 18:05:00,693 INFO L175 Difference]: Start difference. First operand has 415 places, 545 transitions, 6556 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:05:00,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 570 transitions, 7925 flow [2024-06-21 18:05:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 570 transitions, 7702 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-21 18:05:05,690 INFO L231 Difference]: Finished difference. Result has 421 places, 547 transitions, 6584 flow [2024-06-21 18:05:05,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6333, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6584, PETRI_PLACES=421, PETRI_TRANSITIONS=547} [2024-06-21 18:05:05,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 18:05:05,690 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 547 transitions, 6584 flow [2024-06-21 18:05:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:05,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:05,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:05:05,691 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:05,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -254199866, now seen corresponding path program 4 times [2024-06-21 18:05:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087358767] [2024-06-21 18:05:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:06,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087358767] [2024-06-21 18:05:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087358767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:06,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685633829] [2024-06-21 18:05:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:06,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:06,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 547 transitions, 6584 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:06,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:06,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:06,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:07,980 INFO L124 PetriNetUnfolderBase]: 3042/5085 cut-off events. [2024-06-21 18:05:07,980 INFO L125 PetriNetUnfolderBase]: For 850078/850078 co-relation queries the response was YES. [2024-06-21 18:05:08,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47149 conditions, 5085 events. 3042/5085 cut-off events. For 850078/850078 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33218 event pairs, 538 based on Foata normal form. 4/5083 useless extension candidates. Maximal degree in co-relation 46956. Up to 4518 conditions per place. [2024-06-21 18:05:08,067 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 506 selfloop transitions, 53 changer transitions 0/566 dead transitions. [2024-06-21 18:05:08,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 566 transitions, 7895 flow [2024-06-21 18:05:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:05:08,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:05:08,068 INFO L175 Difference]: Start difference. First operand has 421 places, 547 transitions, 6584 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:05:08,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 566 transitions, 7895 flow [2024-06-21 18:05:12,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 566 transitions, 7718 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 18:05:12,659 INFO L231 Difference]: Finished difference. Result has 421 places, 550 transitions, 6673 flow [2024-06-21 18:05:12,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6673, PETRI_PLACES=421, PETRI_TRANSITIONS=550} [2024-06-21 18:05:12,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 18:05:12,659 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 550 transitions, 6673 flow [2024-06-21 18:05:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:12,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:12,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:12,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:05:12,660 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:12,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1424397530, now seen corresponding path program 5 times [2024-06-21 18:05:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779068517] [2024-06-21 18:05:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:13,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779068517] [2024-06-21 18:05:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779068517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:13,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411800812] [2024-06-21 18:05:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:13,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:13,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:13,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 550 transitions, 6673 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:13,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:13,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:13,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:14,963 INFO L124 PetriNetUnfolderBase]: 3058/5113 cut-off events. [2024-06-21 18:05:14,963 INFO L125 PetriNetUnfolderBase]: For 851888/851888 co-relation queries the response was YES. [2024-06-21 18:05:15,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47206 conditions, 5113 events. 3058/5113 cut-off events. For 851888/851888 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33400 event pairs, 550 based on Foata normal form. 4/5111 useless extension candidates. Maximal degree in co-relation 47012. Up to 4476 conditions per place. [2024-06-21 18:05:15,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 71 changer transitions 0/569 dead transitions. [2024-06-21 18:05:15,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 569 transitions, 7996 flow [2024-06-21 18:05:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:05:15,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 18:05:15,050 INFO L175 Difference]: Start difference. First operand has 421 places, 550 transitions, 6673 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:05:15,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 569 transitions, 7996 flow [2024-06-21 18:05:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 569 transitions, 7752 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 18:05:18,984 INFO L231 Difference]: Finished difference. Result has 423 places, 553 transitions, 6737 flow [2024-06-21 18:05:18,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6429, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6737, PETRI_PLACES=423, PETRI_TRANSITIONS=553} [2024-06-21 18:05:18,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 18:05:18,984 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 553 transitions, 6737 flow [2024-06-21 18:05:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:18,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:18,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:18,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:05:18,985 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:18,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1424545400, now seen corresponding path program 6 times [2024-06-21 18:05:18,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:18,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125696710] [2024-06-21 18:05:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:19,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125696710] [2024-06-21 18:05:19,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125696710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:19,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:19,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:19,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187873093] [2024-06-21 18:05:19,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:19,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:19,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:19,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:19,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:19,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 553 transitions, 6737 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:19,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:19,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:19,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:21,215 INFO L124 PetriNetUnfolderBase]: 3103/5184 cut-off events. [2024-06-21 18:05:21,215 INFO L125 PetriNetUnfolderBase]: For 894215/894215 co-relation queries the response was YES. [2024-06-21 18:05:21,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48878 conditions, 5184 events. 3103/5184 cut-off events. For 894215/894215 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33922 event pairs, 554 based on Foata normal form. 4/5182 useless extension candidates. Maximal degree in co-relation 48683. Up to 4468 conditions per place. [2024-06-21 18:05:21,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 74 changer transitions 0/577 dead transitions. [2024-06-21 18:05:21,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 577 transitions, 8482 flow [2024-06-21 18:05:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:05:21,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:05:21,302 INFO L175 Difference]: Start difference. First operand has 423 places, 553 transitions, 6737 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:05:21,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 577 transitions, 8482 flow [2024-06-21 18:05:26,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 577 transitions, 8196 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-21 18:05:26,065 INFO L231 Difference]: Finished difference. Result has 426 places, 559 transitions, 6931 flow [2024-06-21 18:05:26,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6931, PETRI_PLACES=426, PETRI_TRANSITIONS=559} [2024-06-21 18:05:26,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 18:05:26,066 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 559 transitions, 6931 flow [2024-06-21 18:05:26,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:26,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:26,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:05:26,066 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:26,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1424391578, now seen corresponding path program 2 times [2024-06-21 18:05:26,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:26,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13621900] [2024-06-21 18:05:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:27,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13621900] [2024-06-21 18:05:27,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13621900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:27,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:27,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106597769] [2024-06-21 18:05:27,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:27,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:27,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:27,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 559 transitions, 6931 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:27,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:28,706 INFO L124 PetriNetUnfolderBase]: 3159/5270 cut-off events. [2024-06-21 18:05:28,706 INFO L125 PetriNetUnfolderBase]: For 1030676/1030676 co-relation queries the response was YES. [2024-06-21 18:05:28,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50408 conditions, 5270 events. 3159/5270 cut-off events. For 1030676/1030676 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34583 event pairs, 569 based on Foata normal form. 16/5280 useless extension candidates. Maximal degree in co-relation 50211. Up to 4619 conditions per place. [2024-06-21 18:05:28,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 55 changer transitions 0/581 dead transitions. [2024-06-21 18:05:28,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 581 transitions, 8328 flow [2024-06-21 18:05:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 18:05:28,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 18:05:28,803 INFO L175 Difference]: Start difference. First operand has 426 places, 559 transitions, 6931 flow. Second operand 10 states and 194 transitions. [2024-06-21 18:05:28,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 581 transitions, 8328 flow [2024-06-21 18:05:33,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 581 transitions, 8052 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-21 18:05:33,454 INFO L231 Difference]: Finished difference. Result has 431 places, 561 transitions, 6916 flow [2024-06-21 18:05:33,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6916, PETRI_PLACES=431, PETRI_TRANSITIONS=561} [2024-06-21 18:05:33,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-21 18:05:33,454 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 561 transitions, 6916 flow [2024-06-21 18:05:33,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:33,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:33,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 18:05:33,455 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:33,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -254193914, now seen corresponding path program 3 times [2024-06-21 18:05:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:33,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194543503] [2024-06-21 18:05:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194543503] [2024-06-21 18:05:34,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194543503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:34,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145374865] [2024-06-21 18:05:34,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:34,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:34,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:34,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:34,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 561 transitions, 6916 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:34,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:34,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:34,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:36,046 INFO L124 PetriNetUnfolderBase]: 3215/5356 cut-off events. [2024-06-21 18:05:36,047 INFO L125 PetriNetUnfolderBase]: For 1057984/1057984 co-relation queries the response was YES. [2024-06-21 18:05:36,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51647 conditions, 5356 events. 3215/5356 cut-off events. For 1057984/1057984 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35176 event pairs, 577 based on Foata normal form. 16/5366 useless extension candidates. Maximal degree in co-relation 51448. Up to 4707 conditions per place. [2024-06-21 18:05:36,134 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 518 selfloop transitions, 58 changer transitions 0/583 dead transitions. [2024-06-21 18:05:36,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 583 transitions, 8321 flow [2024-06-21 18:05:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:05:36,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:05:36,135 INFO L175 Difference]: Start difference. First operand has 431 places, 561 transitions, 6916 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:05:36,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 583 transitions, 8321 flow [2024-06-21 18:05:40,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 583 transitions, 8134 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 18:05:40,997 INFO L231 Difference]: Finished difference. Result has 433 places, 563 transitions, 7000 flow [2024-06-21 18:05:40,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6729, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7000, PETRI_PLACES=433, PETRI_TRANSITIONS=563} [2024-06-21 18:05:40,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-21 18:05:40,997 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 563 transitions, 7000 flow [2024-06-21 18:05:40,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:40,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:40,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:40,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 18:05:40,997 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:40,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1217738138, now seen corresponding path program 4 times [2024-06-21 18:05:40,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:40,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77048778] [2024-06-21 18:05:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:40,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:41,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:41,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77048778] [2024-06-21 18:05:41,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77048778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:41,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:41,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520592785] [2024-06-21 18:05:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:41,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:42,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 563 transitions, 7000 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:42,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:42,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:42,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:43,581 INFO L124 PetriNetUnfolderBase]: 3271/5456 cut-off events. [2024-06-21 18:05:43,581 INFO L125 PetriNetUnfolderBase]: For 1079287/1079287 co-relation queries the response was YES. [2024-06-21 18:05:43,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52754 conditions, 5456 events. 3271/5456 cut-off events. For 1079287/1079287 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35975 event pairs, 591 based on Foata normal form. 16/5466 useless extension candidates. Maximal degree in co-relation 52554. Up to 4725 conditions per place. [2024-06-21 18:05:43,674 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 480 selfloop transitions, 98 changer transitions 0/585 dead transitions. [2024-06-21 18:05:43,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 585 transitions, 8413 flow [2024-06-21 18:05:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:05:43,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 18:05:43,677 INFO L175 Difference]: Start difference. First operand has 433 places, 563 transitions, 7000 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:05:43,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 585 transitions, 8413 flow [2024-06-21 18:05:49,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 585 transitions, 8216 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 18:05:49,013 INFO L231 Difference]: Finished difference. Result has 435 places, 565 transitions, 7155 flow [2024-06-21 18:05:49,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7155, PETRI_PLACES=435, PETRI_TRANSITIONS=565} [2024-06-21 18:05:49,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-21 18:05:49,013 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 565 transitions, 7155 flow [2024-06-21 18:05:49,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:49,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:49,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:49,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 18:05:49,014 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:49,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1217471228, now seen corresponding path program 5 times [2024-06-21 18:05:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:49,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118827337] [2024-06-21 18:05:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:49,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118827337] [2024-06-21 18:05:49,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118827337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:49,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:49,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124403642] [2024-06-21 18:05:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:49,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:50,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:50,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 565 transitions, 7155 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:50,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:50,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:50,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:51,640 INFO L124 PetriNetUnfolderBase]: 3431/5706 cut-off events. [2024-06-21 18:05:51,640 INFO L125 PetriNetUnfolderBase]: For 1064181/1064181 co-relation queries the response was YES. [2024-06-21 18:05:51,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55103 conditions, 5706 events. 3431/5706 cut-off events. For 1064181/1064181 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37556 event pairs, 611 based on Foata normal form. 12/5712 useless extension candidates. Maximal degree in co-relation 54902. Up to 4729 conditions per place. [2024-06-21 18:05:51,728 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 108 changer transitions 0/596 dead transitions. [2024-06-21 18:05:51,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 596 transitions, 8814 flow [2024-06-21 18:05:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 18:05:51,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 18:05:51,729 INFO L175 Difference]: Start difference. First operand has 435 places, 565 transitions, 7155 flow. Second operand 10 states and 198 transitions. [2024-06-21 18:05:51,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 596 transitions, 8814 flow [2024-06-21 18:05:55,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 596 transitions, 8524 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 18:05:56,005 INFO L231 Difference]: Finished difference. Result has 438 places, 573 transitions, 7446 flow [2024-06-21 18:05:56,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6865, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7446, PETRI_PLACES=438, PETRI_TRANSITIONS=573} [2024-06-21 18:05:56,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 18:05:56,006 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 573 transitions, 7446 flow [2024-06-21 18:05:56,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:56,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:56,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:56,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 18:05:56,006 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:56,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1466114954, now seen corresponding path program 7 times [2024-06-21 18:05:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353097346] [2024-06-21 18:05:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:05:56,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:56,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353097346] [2024-06-21 18:05:56,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353097346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:56,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:56,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:56,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580479512] [2024-06-21 18:05:56,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:56,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:56,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:56,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:05:56,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 573 transitions, 7446 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:56,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:56,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:05:56,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:58,372 INFO L124 PetriNetUnfolderBase]: 3437/5711 cut-off events. [2024-06-21 18:05:58,372 INFO L125 PetriNetUnfolderBase]: For 991089/991089 co-relation queries the response was YES. [2024-06-21 18:05:58,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54818 conditions, 5711 events. 3437/5711 cut-off events. For 991089/991089 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37744 event pairs, 630 based on Foata normal form. 4/5707 useless extension candidates. Maximal degree in co-relation 54615. Up to 4955 conditions per place. [2024-06-21 18:05:58,468 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 84 changer transitions 0/598 dead transitions. [2024-06-21 18:05:58,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 598 transitions, 9353 flow [2024-06-21 18:05:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 18:05:58,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 18:05:58,469 INFO L175 Difference]: Start difference. First operand has 438 places, 573 transitions, 7446 flow. Second operand 9 states and 177 transitions. [2024-06-21 18:05:58,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 598 transitions, 9353 flow [2024-06-21 18:06:03,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 598 transitions, 9028 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 18:06:03,656 INFO L231 Difference]: Finished difference. Result has 441 places, 581 transitions, 7695 flow [2024-06-21 18:06:03,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7695, PETRI_PLACES=441, PETRI_TRANSITIONS=581} [2024-06-21 18:06:03,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 18:06:03,657 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 581 transitions, 7695 flow [2024-06-21 18:06:03,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:03,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:03,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 18:06:03,658 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:03,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash -858809114, now seen corresponding path program 6 times [2024-06-21 18:06:03,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:03,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576776433] [2024-06-21 18:06:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:03,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:04,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:04,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576776433] [2024-06-21 18:06:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576776433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:04,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:04,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:06:04,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401977627] [2024-06-21 18:06:04,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:04,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:06:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:06:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:06:04,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:06:04,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 581 transitions, 7695 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:04,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:04,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:06:04,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:06,270 INFO L124 PetriNetUnfolderBase]: 3493/5801 cut-off events. [2024-06-21 18:06:06,270 INFO L125 PetriNetUnfolderBase]: For 1124815/1124815 co-relation queries the response was YES. [2024-06-21 18:06:06,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55855 conditions, 5801 events. 3493/5801 cut-off events. For 1124815/1124815 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 38445 event pairs, 663 based on Foata normal form. 16/5807 useless extension candidates. Maximal degree in co-relation 55650. Up to 4984 conditions per place. [2024-06-21 18:06:06,370 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 479 selfloop transitions, 114 changer transitions 0/600 dead transitions. [2024-06-21 18:06:06,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 600 transitions, 9140 flow [2024-06-21 18:06:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:06:06,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-21 18:06:06,371 INFO L175 Difference]: Start difference. First operand has 441 places, 581 transitions, 7695 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:06:06,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 600 transitions, 9140 flow [2024-06-21 18:06:11,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 600 transitions, 8842 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-21 18:06:11,956 INFO L231 Difference]: Finished difference. Result has 447 places, 583 transitions, 7793 flow [2024-06-21 18:06:11,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7793, PETRI_PLACES=447, PETRI_TRANSITIONS=583} [2024-06-21 18:06:11,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 18:06:11,957 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 583 transitions, 7793 flow [2024-06-21 18:06:11,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:11,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:11,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:11,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 18:06:11,957 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:11,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:11,958 INFO L85 PathProgramCache]: Analyzing trace with hash -858542204, now seen corresponding path program 7 times [2024-06-21 18:06:11,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:11,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635030712] [2024-06-21 18:06:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:11,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635030712] [2024-06-21 18:06:12,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635030712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:12,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:12,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:06:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222104022] [2024-06-21 18:06:12,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:12,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:06:12,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:06:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:06:13,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:06:13,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 583 transitions, 7793 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:13,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:13,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:06:13,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:14,627 INFO L124 PetriNetUnfolderBase]: 3573/5939 cut-off events. [2024-06-21 18:06:14,627 INFO L125 PetriNetUnfolderBase]: For 1109294/1109294 co-relation queries the response was YES. [2024-06-21 18:06:14,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57250 conditions, 5939 events. 3573/5939 cut-off events. For 1109294/1109294 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39544 event pairs, 675 based on Foata normal form. 12/5941 useless extension candidates. Maximal degree in co-relation 57043. Up to 4988 conditions per place. [2024-06-21 18:06:14,735 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 480 selfloop transitions, 120 changer transitions 0/607 dead transitions. [2024-06-21 18:06:14,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 607 transitions, 9346 flow [2024-06-21 18:06:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:06:14,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 18:06:14,736 INFO L175 Difference]: Start difference. First operand has 447 places, 583 transitions, 7793 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:06:14,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 607 transitions, 9346 flow [2024-06-21 18:06:20,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 607 transitions, 9012 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 18:06:20,495 INFO L231 Difference]: Finished difference. Result has 450 places, 587 transitions, 7930 flow [2024-06-21 18:06:20,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7459, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7930, PETRI_PLACES=450, PETRI_TRANSITIONS=587} [2024-06-21 18:06:20,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-21 18:06:20,496 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 587 transitions, 7930 flow [2024-06-21 18:06:20,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:20,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:20,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:20,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 18:06:20,497 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:20,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -937923932, now seen corresponding path program 8 times [2024-06-21 18:06:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:20,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345946750] [2024-06-21 18:06:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:21,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345946750] [2024-06-21 18:06:21,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345946750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:21,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:21,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:06:21,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917276065] [2024-06-21 18:06:21,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:21,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:06:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:06:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:06:21,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:06:21,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 587 transitions, 7930 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:21,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:21,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:06:21,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:23,381 INFO L124 PetriNetUnfolderBase]: 3745/6213 cut-off events. [2024-06-21 18:06:23,381 INFO L125 PetriNetUnfolderBase]: For 1297634/1297634 co-relation queries the response was YES. [2024-06-21 18:06:23,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63166 conditions, 6213 events. 3745/6213 cut-off events. For 1297634/1297634 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 41557 event pairs, 721 based on Foata normal form. 12/6215 useless extension candidates. Maximal degree in co-relation 62957. Up to 5220 conditions per place. [2024-06-21 18:06:23,481 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 140 changer transitions 0/614 dead transitions. [2024-06-21 18:06:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 614 transitions, 9939 flow [2024-06-21 18:06:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 18:06:23,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:06:23,482 INFO L175 Difference]: Start difference. First operand has 450 places, 587 transitions, 7930 flow. Second operand 10 states and 200 transitions. [2024-06-21 18:06:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 614 transitions, 9939 flow [2024-06-21 18:06:29,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 614 transitions, 9586 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 18:06:29,802 INFO L231 Difference]: Finished difference. Result has 454 places, 593 transitions, 8258 flow [2024-06-21 18:06:29,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8258, PETRI_PLACES=454, PETRI_TRANSITIONS=593} [2024-06-21 18:06:29,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-21 18:06:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 593 transitions, 8258 flow [2024-06-21 18:06:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:29,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:29,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:29,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 18:06:29,803 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:29,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash -689762554, now seen corresponding path program 9 times [2024-06-21 18:06:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:29,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344866783] [2024-06-21 18:06:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:30,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344866783] [2024-06-21 18:06:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344866783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:30,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:06:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767888874] [2024-06-21 18:06:30,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:30,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:06:30,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:06:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:06:30,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:06:30,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 593 transitions, 8258 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:30,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:30,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:06:30,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:32,594 INFO L124 PetriNetUnfolderBase]: 3877/6419 cut-off events. [2024-06-21 18:06:32,594 INFO L125 PetriNetUnfolderBase]: For 1492430/1492430 co-relation queries the response was YES. [2024-06-21 18:06:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68872 conditions, 6419 events. 3877/6419 cut-off events. For 1492430/1492430 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 43033 event pairs, 757 based on Foata normal form. 12/6421 useless extension candidates. Maximal degree in co-relation 68661. Up to 5422 conditions per place. [2024-06-21 18:06:32,705 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 178 changer transitions 0/618 dead transitions. [2024-06-21 18:06:32,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 618 transitions, 10241 flow [2024-06-21 18:06:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 18:06:32,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 18:06:32,706 INFO L175 Difference]: Start difference. First operand has 454 places, 593 transitions, 8258 flow. Second operand 10 states and 201 transitions. [2024-06-21 18:06:32,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 618 transitions, 10241 flow [2024-06-21 18:06:39,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 618 transitions, 9922 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 18:06:39,955 INFO L231 Difference]: Finished difference. Result has 458 places, 597 transitions, 8644 flow [2024-06-21 18:06:39,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7939, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8644, PETRI_PLACES=458, PETRI_TRANSITIONS=597} [2024-06-21 18:06:39,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-21 18:06:39,956 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 597 transitions, 8644 flow [2024-06-21 18:06:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:39,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:39,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:39,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 18:06:39,956 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:39,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash -46016136, now seen corresponding path program 10 times [2024-06-21 18:06:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483215185] [2024-06-21 18:06:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:39,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:40,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:40,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483215185] [2024-06-21 18:06:40,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483215185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:40,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:40,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:06:40,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755960733] [2024-06-21 18:06:40,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:40,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:06:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:06:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:06:41,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:06:41,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 597 transitions, 8644 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:41,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:41,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:06:41,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:42,825 INFO L124 PetriNetUnfolderBase]: 3841/6371 cut-off events. [2024-06-21 18:06:42,825 INFO L125 PetriNetUnfolderBase]: For 1387197/1387197 co-relation queries the response was YES. [2024-06-21 18:06:42,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65595 conditions, 6371 events. 3841/6371 cut-off events. For 1387197/1387197 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42822 event pairs, 755 based on Foata normal form. 16/6377 useless extension candidates. Maximal degree in co-relation 65382. Up to 5532 conditions per place. [2024-06-21 18:06:42,938 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 134 changer transitions 0/614 dead transitions. [2024-06-21 18:06:42,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 614 transitions, 9959 flow [2024-06-21 18:06:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:06:42,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-21 18:06:42,939 INFO L175 Difference]: Start difference. First operand has 458 places, 597 transitions, 8644 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:06:42,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 614 transitions, 9959 flow [2024-06-21 18:06:50,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 614 transitions, 9487 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-06-21 18:06:50,634 INFO L231 Difference]: Finished difference. Result has 462 places, 597 transitions, 8446 flow [2024-06-21 18:06:50,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8446, PETRI_PLACES=462, PETRI_TRANSITIONS=597} [2024-06-21 18:06:50,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-21 18:06:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 597 transitions, 8446 flow [2024-06-21 18:06:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:50,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:50,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:50,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 18:06:50,635 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:50,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash -690029464, now seen corresponding path program 11 times [2024-06-21 18:06:50,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:50,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919302009] [2024-06-21 18:06:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:51,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:51,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919302009] [2024-06-21 18:06:51,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919302009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:51,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:51,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:06:51,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527766314] [2024-06-21 18:06:51,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:51,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:06:51,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:51,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:06:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:06:51,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:06:51,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 597 transitions, 8446 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:51,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:51,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:06:51,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:53,574 INFO L124 PetriNetUnfolderBase]: 3805/6317 cut-off events. [2024-06-21 18:06:53,574 INFO L125 PetriNetUnfolderBase]: For 1214543/1214543 co-relation queries the response was YES. [2024-06-21 18:06:53,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61201 conditions, 6317 events. 3805/6317 cut-off events. For 1214543/1214543 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42496 event pairs, 739 based on Foata normal form. 16/6323 useless extension candidates. Maximal degree in co-relation 60986. Up to 5414 conditions per place. [2024-06-21 18:06:53,689 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 174 changer transitions 0/614 dead transitions. [2024-06-21 18:06:53,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 614 transitions, 9761 flow [2024-06-21 18:06:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:06:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-21 18:06:53,690 INFO L175 Difference]: Start difference. First operand has 462 places, 597 transitions, 8446 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:06:53,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 614 transitions, 9761 flow [2024-06-21 18:07:00,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 614 transitions, 9383 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-21 18:07:00,290 INFO L231 Difference]: Finished difference. Result has 464 places, 597 transitions, 8422 flow [2024-06-21 18:07:00,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8422, PETRI_PLACES=464, PETRI_TRANSITIONS=597} [2024-06-21 18:07:00,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 18:07:00,290 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 597 transitions, 8422 flow [2024-06-21 18:07:00,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:00,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:00,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:00,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 18:07:00,291 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:00,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1387172642, now seen corresponding path program 12 times [2024-06-21 18:07:00,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:00,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504019027] [2024-06-21 18:07:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:00,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504019027] [2024-06-21 18:07:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504019027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:01,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:07:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767778227] [2024-06-21 18:07:01,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:07:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:07:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:07:01,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:07:01,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 597 transitions, 8422 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:01,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:01,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:07:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:03,048 INFO L124 PetriNetUnfolderBase]: 3832/6368 cut-off events. [2024-06-21 18:07:03,048 INFO L125 PetriNetUnfolderBase]: For 1160023/1160023 co-relation queries the response was YES. [2024-06-21 18:07:03,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61163 conditions, 6368 events. 3832/6368 cut-off events. For 1160023/1160023 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42820 event pairs, 710 based on Foata normal form. 12/6370 useless extension candidates. Maximal degree in co-relation 60947. Up to 4631 conditions per place. [2024-06-21 18:07:03,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 212 changer transitions 0/620 dead transitions. [2024-06-21 18:07:03,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 620 transitions, 9971 flow [2024-06-21 18:07:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 18:07:03,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:07:03,169 INFO L175 Difference]: Start difference. First operand has 464 places, 597 transitions, 8422 flow. Second operand 10 states and 200 transitions. [2024-06-21 18:07:03,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 620 transitions, 9971 flow [2024-06-21 18:07:11,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 620 transitions, 9613 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:07:11,685 INFO L231 Difference]: Finished difference. Result has 465 places, 599 transitions, 8671 flow [2024-06-21 18:07:11,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8671, PETRI_PLACES=465, PETRI_TRANSITIONS=599} [2024-06-21 18:07:11,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-21 18:07:11,686 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 599 transitions, 8671 flow [2024-06-21 18:07:11,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:11,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:11,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:11,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 18:07:11,686 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:11,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:11,687 INFO L85 PathProgramCache]: Analyzing trace with hash -733575527, now seen corresponding path program 1 times [2024-06-21 18:07:11,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063730595] [2024-06-21 18:07:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:11,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:12,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063730595] [2024-06-21 18:07:12,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063730595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:12,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:12,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:12,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956905618] [2024-06-21 18:07:12,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:12,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:12,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:07:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 599 transitions, 8671 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:07:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:14,471 INFO L124 PetriNetUnfolderBase]: 3902/6485 cut-off events. [2024-06-21 18:07:14,472 INFO L125 PetriNetUnfolderBase]: For 1149634/1149634 co-relation queries the response was YES. [2024-06-21 18:07:14,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62910 conditions, 6485 events. 3902/6485 cut-off events. For 1149634/1149634 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 43791 event pairs, 682 based on Foata normal form. 8/6481 useless extension candidates. Maximal degree in co-relation 62693. Up to 5881 conditions per place. [2024-06-21 18:07:14,575 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 599 selfloop transitions, 34 changer transitions 0/640 dead transitions. [2024-06-21 18:07:14,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 640 transitions, 10327 flow [2024-06-21 18:07:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:07:14,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 18:07:14,576 INFO L175 Difference]: Start difference. First operand has 465 places, 599 transitions, 8671 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:07:14,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 640 transitions, 10327 flow [2024-06-21 18:07:21,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 640 transitions, 9764 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 18:07:21,872 INFO L231 Difference]: Finished difference. Result has 470 places, 611 transitions, 8445 flow [2024-06-21 18:07:21,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8112, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8445, PETRI_PLACES=470, PETRI_TRANSITIONS=611} [2024-06-21 18:07:21,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 18:07:21,873 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 611 transitions, 8445 flow [2024-06-21 18:07:21,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:21,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:21,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:21,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 18:07:21,874 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:21,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -299410595, now seen corresponding path program 2 times [2024-06-21 18:07:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384908187] [2024-06-21 18:07:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:22,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384908187] [2024-06-21 18:07:22,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384908187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:22,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:22,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060138113] [2024-06-21 18:07:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:22,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:22,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:22,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:07:22,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 611 transitions, 8445 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:22,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:22,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:07:22,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:24,614 INFO L124 PetriNetUnfolderBase]: 3930/6533 cut-off events. [2024-06-21 18:07:24,614 INFO L125 PetriNetUnfolderBase]: For 1150787/1150787 co-relation queries the response was YES. [2024-06-21 18:07:24,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62311 conditions, 6533 events. 3930/6533 cut-off events. For 1150787/1150787 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 44159 event pairs, 689 based on Foata normal form. 8/6533 useless extension candidates. Maximal degree in co-relation 62090. Up to 5858 conditions per place. [2024-06-21 18:07:24,718 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 590 selfloop transitions, 47 changer transitions 0/644 dead transitions. [2024-06-21 18:07:24,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 644 transitions, 9981 flow [2024-06-21 18:07:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:07:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:07:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:07:24,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-21 18:07:24,719 INFO L175 Difference]: Start difference. First operand has 470 places, 611 transitions, 8445 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:07:24,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 644 transitions, 9981 flow [2024-06-21 18:07:32,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 644 transitions, 9874 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 18:07:32,254 INFO L231 Difference]: Finished difference. Result has 477 places, 614 transitions, 8551 flow [2024-06-21 18:07:32,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8551, PETRI_PLACES=477, PETRI_TRANSITIONS=614} [2024-06-21 18:07:32,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-21 18:07:32,255 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 614 transitions, 8551 flow [2024-06-21 18:07:32,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:32,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:32,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:32,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 18:07:32,256 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:32,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1771485321, now seen corresponding path program 3 times [2024-06-21 18:07:32,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:32,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649010137] [2024-06-21 18:07:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:32,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649010137] [2024-06-21 18:07:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649010137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714273212] [2024-06-21 18:07:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:32,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:07:32,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 614 transitions, 8551 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:32,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:32,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:07:32,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:35,136 INFO L124 PetriNetUnfolderBase]: 3966/6596 cut-off events. [2024-06-21 18:07:35,136 INFO L125 PetriNetUnfolderBase]: For 1190957/1190957 co-relation queries the response was YES. [2024-06-21 18:07:35,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63136 conditions, 6596 events. 3966/6596 cut-off events. For 1190957/1190957 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 44670 event pairs, 706 based on Foata normal form. 10/6603 useless extension candidates. Maximal degree in co-relation 62913. Up to 5916 conditions per place. [2024-06-21 18:07:35,258 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 588 selfloop transitions, 48 changer transitions 0/643 dead transitions. [2024-06-21 18:07:35,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 643 transitions, 10091 flow [2024-06-21 18:07:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:07:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:07:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 18:07:35,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 18:07:35,259 INFO L175 Difference]: Start difference. First operand has 477 places, 614 transitions, 8551 flow. Second operand 9 states and 183 transitions. [2024-06-21 18:07:35,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 643 transitions, 10091 flow [2024-06-21 18:07:44,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 643 transitions, 9922 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 18:07:44,146 INFO L231 Difference]: Finished difference. Result has 480 places, 615 transitions, 8543 flow [2024-06-21 18:07:44,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8543, PETRI_PLACES=480, PETRI_TRANSITIONS=615} [2024-06-21 18:07:44,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-21 18:07:44,146 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 615 transitions, 8543 flow [2024-06-21 18:07:44,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:44,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:44,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 18:07:44,147 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:44,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1998062465, now seen corresponding path program 4 times [2024-06-21 18:07:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142817107] [2024-06-21 18:07:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142817107] [2024-06-21 18:07:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142817107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:44,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:44,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:44,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053664161] [2024-06-21 18:07:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:44,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:07:44,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 615 transitions, 8543 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:44,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:44,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:07:44,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:47,145 INFO L124 PetriNetUnfolderBase]: 4002/6660 cut-off events. [2024-06-21 18:07:47,145 INFO L125 PetriNetUnfolderBase]: For 1208738/1208738 co-relation queries the response was YES. [2024-06-21 18:07:47,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63722 conditions, 6660 events. 4002/6660 cut-off events. For 1208738/1208738 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 45104 event pairs, 708 based on Foata normal form. 10/6667 useless extension candidates. Maximal degree in co-relation 63498. Up to 5950 conditions per place. [2024-06-21 18:07:47,263 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 578 selfloop transitions, 58 changer transitions 0/643 dead transitions. [2024-06-21 18:07:47,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 643 transitions, 10126 flow [2024-06-21 18:07:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:07:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:07:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:07:47,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 18:07:47,264 INFO L175 Difference]: Start difference. First operand has 480 places, 615 transitions, 8543 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:07:47,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 643 transitions, 10126 flow [2024-06-21 18:07:54,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 643 transitions, 9995 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:07:54,556 INFO L231 Difference]: Finished difference. Result has 482 places, 616 transitions, 8595 flow [2024-06-21 18:07:54,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8595, PETRI_PLACES=482, PETRI_TRANSITIONS=616} [2024-06-21 18:07:54,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-21 18:07:54,557 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 616 transitions, 8595 flow [2024-06-21 18:07:54,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:54,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:54,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 18:07:54,557 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:54,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash 421856861, now seen corresponding path program 5 times [2024-06-21 18:07:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677211004] [2024-06-21 18:07:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:55,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:55,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677211004] [2024-06-21 18:07:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677211004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:55,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824908269] [2024-06-21 18:07:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:55,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:55,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:07:55,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 616 transitions, 8595 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:55,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:55,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:07:55,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:57,491 INFO L124 PetriNetUnfolderBase]: 4038/6720 cut-off events. [2024-06-21 18:07:57,492 INFO L125 PetriNetUnfolderBase]: For 1225647/1225647 co-relation queries the response was YES. [2024-06-21 18:07:57,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64438 conditions, 6720 events. 4038/6720 cut-off events. For 1225647/1225647 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45561 event pairs, 715 based on Foata normal form. 10/6728 useless extension candidates. Maximal degree in co-relation 64213. Up to 6079 conditions per place. [2024-06-21 18:07:57,595 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 603 selfloop transitions, 38 changer transitions 0/648 dead transitions. [2024-06-21 18:07:57,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 648 transitions, 10160 flow [2024-06-21 18:07:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:07:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:07:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:07:57,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 18:07:57,596 INFO L175 Difference]: Start difference. First operand has 482 places, 616 transitions, 8595 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:07:57,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 648 transitions, 10160 flow [2024-06-21 18:08:05,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 648 transitions, 10007 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 18:08:05,614 INFO L231 Difference]: Finished difference. Result has 484 places, 617 transitions, 8587 flow [2024-06-21 18:08:05,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8587, PETRI_PLACES=484, PETRI_TRANSITIONS=617} [2024-06-21 18:08:05,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-21 18:08:05,614 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 617 transitions, 8587 flow [2024-06-21 18:08:05,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:05,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:05,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:05,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 18:08:05,615 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:05,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1796862173, now seen corresponding path program 6 times [2024-06-21 18:08:05,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:05,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093863399] [2024-06-21 18:08:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:05,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:08:06,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093863399] [2024-06-21 18:08:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093863399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:06,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:06,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:08:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498135679] [2024-06-21 18:08:06,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:08:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:08:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:08:06,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:08:06,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 617 transitions, 8587 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:06,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:06,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:08:06,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:08,461 INFO L124 PetriNetUnfolderBase]: 4066/6770 cut-off events. [2024-06-21 18:08:08,462 INFO L125 PetriNetUnfolderBase]: For 1217496/1217496 co-relation queries the response was YES. [2024-06-21 18:08:08,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64873 conditions, 6770 events. 4066/6770 cut-off events. For 1217496/1217496 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45970 event pairs, 662 based on Foata normal form. 8/6776 useless extension candidates. Maximal degree in co-relation 64647. Up to 6037 conditions per place. [2024-06-21 18:08:08,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 610 selfloop transitions, 43 changer transitions 0/660 dead transitions. [2024-06-21 18:08:08,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 660 transitions, 10242 flow [2024-06-21 18:08:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:08:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:08:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 18:08:08,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-21 18:08:08,587 INFO L175 Difference]: Start difference. First operand has 484 places, 617 transitions, 8587 flow. Second operand 10 states and 203 transitions. [2024-06-21 18:08:08,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 660 transitions, 10242 flow [2024-06-21 18:08:17,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 660 transitions, 10127 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 18:08:17,094 INFO L231 Difference]: Finished difference. Result has 489 places, 622 transitions, 8754 flow [2024-06-21 18:08:17,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8472, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8754, PETRI_PLACES=489, PETRI_TRANSITIONS=622} [2024-06-21 18:08:17,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-21 18:08:17,094 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 622 transitions, 8754 flow [2024-06-21 18:08:17,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:17,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:17,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:17,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 18:08:17,094 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:17,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1797099323, now seen corresponding path program 7 times [2024-06-21 18:08:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:17,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110551735] [2024-06-21 18:08:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:08:17,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:17,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110551735] [2024-06-21 18:08:17,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110551735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:17,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:17,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:08:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845459134] [2024-06-21 18:08:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:08:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:08:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:08:17,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:08:17,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 622 transitions, 8754 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:17,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:17,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:08:17,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:19,890 INFO L124 PetriNetUnfolderBase]: 4140/6896 cut-off events. [2024-06-21 18:08:19,890 INFO L125 PetriNetUnfolderBase]: For 1327373/1327373 co-relation queries the response was YES. [2024-06-21 18:08:19,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68064 conditions, 6896 events. 4140/6896 cut-off events. For 1327373/1327373 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46941 event pairs, 676 based on Foata normal form. 8/6902 useless extension candidates. Maximal degree in co-relation 67835. Up to 6029 conditions per place. [2024-06-21 18:08:20,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 609 selfloop transitions, 47 changer transitions 0/663 dead transitions. [2024-06-21 18:08:20,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 663 transitions, 10753 flow [2024-06-21 18:08:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:08:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:08:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 18:08:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 18:08:20,008 INFO L175 Difference]: Start difference. First operand has 489 places, 622 transitions, 8754 flow. Second operand 10 states and 204 transitions. [2024-06-21 18:08:20,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 663 transitions, 10753 flow [2024-06-21 18:08:30,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 663 transitions, 10555 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 18:08:30,521 INFO L231 Difference]: Finished difference. Result has 493 places, 624 transitions, 8788 flow [2024-06-21 18:08:30,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8788, PETRI_PLACES=493, PETRI_TRANSITIONS=624} [2024-06-21 18:08:30,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-21 18:08:30,522 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 624 transitions, 8788 flow [2024-06-21 18:08:30,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:30,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:30,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:30,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 18:08:30,522 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:30,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash 642291929, now seen corresponding path program 8 times [2024-06-21 18:08:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:30,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700756366] [2024-06-21 18:08:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:08:31,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:31,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700756366] [2024-06-21 18:08:31,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700756366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:31,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:31,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:08:31,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491062857] [2024-06-21 18:08:31,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:31,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:08:31,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:08:31,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:08:31,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:08:31,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 624 transitions, 8788 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:31,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:31,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:08:31,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:33,651 INFO L124 PetriNetUnfolderBase]: 4227/7037 cut-off events. [2024-06-21 18:08:33,651 INFO L125 PetriNetUnfolderBase]: For 1463460/1463460 co-relation queries the response was YES. [2024-06-21 18:08:33,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71326 conditions, 7037 events. 4227/7037 cut-off events. For 1463460/1463460 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 48003 event pairs, 755 based on Foata normal form. 8/7043 useless extension candidates. Maximal degree in co-relation 71096. Up to 6242 conditions per place. [2024-06-21 18:08:33,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 605 selfloop transitions, 51 changer transitions 0/663 dead transitions. [2024-06-21 18:08:33,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 663 transitions, 10849 flow [2024-06-21 18:08:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:08:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:08:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 18:08:33,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-21 18:08:33,768 INFO L175 Difference]: Start difference. First operand has 493 places, 624 transitions, 8788 flow. Second operand 10 states and 203 transitions. [2024-06-21 18:08:33,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 663 transitions, 10849 flow [2024-06-21 18:08:44,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 663 transitions, 10723 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 18:08:44,303 INFO L231 Difference]: Finished difference. Result has 497 places, 626 transitions, 8912 flow [2024-06-21 18:08:44,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8668, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8912, PETRI_PLACES=497, PETRI_TRANSITIONS=626} [2024-06-21 18:08:44,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-21 18:08:44,303 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 626 transitions, 8912 flow [2024-06-21 18:08:44,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:44,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:44,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:44,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 18:08:44,304 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:44,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:44,304 INFO L85 PathProgramCache]: Analyzing trace with hash 642352379, now seen corresponding path program 9 times [2024-06-21 18:08:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:44,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619274080] [2024-06-21 18:08:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:08:44,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:44,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619274080] [2024-06-21 18:08:44,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619274080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:44,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:44,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:08:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116344003] [2024-06-21 18:08:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:44,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:08:44,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:08:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:08:45,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:08:45,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 626 transitions, 8912 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:45,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:45,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:08:45,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:47,317 INFO L124 PetriNetUnfolderBase]: 4204/7008 cut-off events. [2024-06-21 18:08:47,317 INFO L125 PetriNetUnfolderBase]: For 1385919/1385919 co-relation queries the response was YES. [2024-06-21 18:08:47,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68987 conditions, 7008 events. 4204/7008 cut-off events. For 1385919/1385919 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 47867 event pairs, 758 based on Foata normal form. 10/7016 useless extension candidates. Maximal degree in co-relation 68755. Up to 6316 conditions per place. [2024-06-21 18:08:47,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 602 selfloop transitions, 50 changer transitions 0/659 dead transitions. [2024-06-21 18:08:47,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 659 transitions, 10481 flow [2024-06-21 18:08:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:08:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:08:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 18:08:47,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:08:47,442 INFO L175 Difference]: Start difference. First operand has 497 places, 626 transitions, 8912 flow. Second operand 10 states and 200 transitions. [2024-06-21 18:08:47,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 659 transitions, 10481 flow [2024-06-21 18:08:55,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 659 transitions, 10327 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 18:08:55,085 INFO L231 Difference]: Finished difference. Result has 501 places, 626 transitions, 8863 flow [2024-06-21 18:08:55,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8758, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8863, PETRI_PLACES=501, PETRI_TRANSITIONS=626} [2024-06-21 18:08:55,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-21 18:08:55,086 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 626 transitions, 8863 flow [2024-06-21 18:08:55,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:55,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:55,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:55,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 18:08:55,086 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:55,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2064299895, now seen corresponding path program 10 times [2024-06-21 18:08:55,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:55,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706010886] [2024-06-21 18:08:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:08:55,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:55,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706010886] [2024-06-21 18:08:55,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706010886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:55,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:55,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:08:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244181705] [2024-06-21 18:08:55,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:55,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:08:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:08:55,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:08:55,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:08:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 626 transitions, 8863 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:08:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:58,105 INFO L124 PetriNetUnfolderBase]: 4240/7057 cut-off events. [2024-06-21 18:08:58,105 INFO L125 PetriNetUnfolderBase]: For 1397642/1397642 co-relation queries the response was YES. [2024-06-21 18:08:58,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69404 conditions, 7057 events. 4240/7057 cut-off events. For 1397642/1397642 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 48176 event pairs, 778 based on Foata normal form. 10/7065 useless extension candidates. Maximal degree in co-relation 69170. Up to 6394 conditions per place. [2024-06-21 18:08:58,333 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 593 selfloop transitions, 49 changer transitions 0/649 dead transitions. [2024-06-21 18:08:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 649 transitions, 10411 flow [2024-06-21 18:08:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:08:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:08:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:08:58,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:08:58,334 INFO L175 Difference]: Start difference. First operand has 501 places, 626 transitions, 8863 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:08:58,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 649 transitions, 10411 flow [2024-06-21 18:09:06,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 649 transitions, 10299 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:09:06,713 INFO L231 Difference]: Finished difference. Result has 501 places, 627 transitions, 8926 flow [2024-06-21 18:09:06,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8751, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8926, PETRI_PLACES=501, PETRI_TRANSITIONS=627} [2024-06-21 18:09:06,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-21 18:09:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 627 transitions, 8926 flow [2024-06-21 18:09:06,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:06,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:09:06,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:09:06,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 18:09:06,713 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:09:06,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:09:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2061442935, now seen corresponding path program 11 times [2024-06-21 18:09:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:09:06,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812549238] [2024-06-21 18:09:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:09:06,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:09:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:09:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812549238] [2024-06-21 18:09:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812549238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:07,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:07,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:09:07,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139656592] [2024-06-21 18:09:07,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:07,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:09:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:07,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:09:07,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:09:07,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:09:07,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 627 transitions, 8926 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:07,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:07,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:09:07,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:09:09,718 INFO L124 PetriNetUnfolderBase]: 4268/7105 cut-off events. [2024-06-21 18:09:09,718 INFO L125 PetriNetUnfolderBase]: For 1398527/1398527 co-relation queries the response was YES. [2024-06-21 18:09:09,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70286 conditions, 7105 events. 4268/7105 cut-off events. For 1398527/1398527 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 48592 event pairs, 776 based on Foata normal form. 8/7111 useless extension candidates. Maximal degree in co-relation 70051. Up to 6398 conditions per place. [2024-06-21 18:09:09,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 596 selfloop transitions, 52 changer transitions 0/655 dead transitions. [2024-06-21 18:09:09,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 655 transitions, 10574 flow [2024-06-21 18:09:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:09:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:09:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 18:09:09,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 18:09:09,962 INFO L175 Difference]: Start difference. First operand has 501 places, 627 transitions, 8926 flow. Second operand 10 states and 194 transitions. [2024-06-21 18:09:09,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 655 transitions, 10574 flow [2024-06-21 18:09:17,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 655 transitions, 10429 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 18:09:17,673 INFO L231 Difference]: Finished difference. Result has 504 places, 628 transitions, 8963 flow [2024-06-21 18:09:17,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8781, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8963, PETRI_PLACES=504, PETRI_TRANSITIONS=628} [2024-06-21 18:09:17,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-21 18:09:17,673 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 628 transitions, 8963 flow [2024-06-21 18:09:17,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:17,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:09:17,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:09:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 18:09:17,674 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:09:17,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:09:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1893365059, now seen corresponding path program 12 times [2024-06-21 18:09:17,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:09:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314914489] [2024-06-21 18:09:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:09:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:09:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:09:18,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314914489] [2024-06-21 18:09:18,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314914489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:18,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:18,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:09:18,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372842396] [2024-06-21 18:09:18,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:18,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:09:18,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:09:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:09:18,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:09:18,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 628 transitions, 8963 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:18,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:18,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:09:18,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:09:20,693 INFO L124 PetriNetUnfolderBase]: 4304/7183 cut-off events. [2024-06-21 18:09:20,693 INFO L125 PetriNetUnfolderBase]: For 1443928/1443928 co-relation queries the response was YES. [2024-06-21 18:09:20,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71027 conditions, 7183 events. 4304/7183 cut-off events. For 1443928/1443928 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 49376 event pairs, 782 based on Foata normal form. 10/7190 useless extension candidates. Maximal degree in co-relation 70791. Up to 6341 conditions per place. [2024-06-21 18:09:20,815 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 91 changer transitions 0/653 dead transitions. [2024-06-21 18:09:20,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 653 transitions, 10599 flow [2024-06-21 18:09:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:09:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:09:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:09:20,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 18:09:20,816 INFO L175 Difference]: Start difference. First operand has 504 places, 628 transitions, 8963 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:09:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 653 transitions, 10599 flow [2024-06-21 18:09:29,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 653 transitions, 10445 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 18:09:29,750 INFO L231 Difference]: Finished difference. Result has 505 places, 629 transitions, 9072 flow [2024-06-21 18:09:29,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8809, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9072, PETRI_PLACES=505, PETRI_TRANSITIONS=629} [2024-06-21 18:09:29,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-21 18:09:29,751 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 629 transitions, 9072 flow [2024-06-21 18:09:29,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:29,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:09:29,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:09:29,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 18:09:29,751 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:09:29,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:09:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 948305083, now seen corresponding path program 1 times [2024-06-21 18:09:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:09:29,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929821761] [2024-06-21 18:09:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:09:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:09:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:09:30,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929821761] [2024-06-21 18:09:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929821761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:30,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:30,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:09:30,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599346369] [2024-06-21 18:09:30,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:30,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:09:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:09:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:09:30,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:09:30,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 629 transitions, 9072 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:30,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:30,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:09:30,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:09:33,050 INFO L124 PetriNetUnfolderBase]: 4320/7185 cut-off events. [2024-06-21 18:09:33,050 INFO L125 PetriNetUnfolderBase]: For 1352829/1352829 co-relation queries the response was YES. [2024-06-21 18:09:33,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71086 conditions, 7185 events. 4320/7185 cut-off events. For 1352829/1352829 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 49272 event pairs, 807 based on Foata normal form. 1/7182 useless extension candidates. Maximal degree in co-relation 70849. Up to 6419 conditions per place. [2024-06-21 18:09:33,173 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 66 changer transitions 0/660 dead transitions. [2024-06-21 18:09:33,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 660 transitions, 10624 flow [2024-06-21 18:09:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:09:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:09:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 18:09:33,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-21 18:09:33,174 INFO L175 Difference]: Start difference. First operand has 505 places, 629 transitions, 9072 flow. Second operand 9 states and 186 transitions. [2024-06-21 18:09:33,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 660 transitions, 10624 flow [2024-06-21 18:09:44,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 660 transitions, 10391 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 18:09:44,624 INFO L231 Difference]: Finished difference. Result has 507 places, 635 transitions, 9155 flow [2024-06-21 18:09:44,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9155, PETRI_PLACES=507, PETRI_TRANSITIONS=635} [2024-06-21 18:09:44,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-21 18:09:44,624 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 635 transitions, 9155 flow [2024-06-21 18:09:44,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:44,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:09:44,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:09:44,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 18:09:44,625 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:09:44,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:09:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 335047383, now seen corresponding path program 2 times [2024-06-21 18:09:44,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:09:44,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907731229] [2024-06-21 18:09:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:09:44,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:09:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:09:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907731229] [2024-06-21 18:09:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907731229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:45,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:09:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685511688] [2024-06-21 18:09:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:09:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:09:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:09:45,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:09:45,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 635 transitions, 9155 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:45,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:45,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:09:45,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:09:47,790 INFO L124 PetriNetUnfolderBase]: 4325/7194 cut-off events. [2024-06-21 18:09:47,790 INFO L125 PetriNetUnfolderBase]: For 1365640/1365640 co-relation queries the response was YES. [2024-06-21 18:09:47,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71281 conditions, 7194 events. 4325/7194 cut-off events. For 1365640/1365640 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 49311 event pairs, 807 based on Foata normal form. 1/7191 useless extension candidates. Maximal degree in co-relation 71043. Up to 6426 conditions per place. [2024-06-21 18:09:48,053 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 588 selfloop transitions, 68 changer transitions 0/663 dead transitions. [2024-06-21 18:09:48,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 663 transitions, 10693 flow [2024-06-21 18:09:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:09:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:09:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 18:09:48,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-21 18:09:48,054 INFO L175 Difference]: Start difference. First operand has 507 places, 635 transitions, 9155 flow. Second operand 9 states and 185 transitions. [2024-06-21 18:09:48,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 663 transitions, 10693 flow [2024-06-21 18:09:58,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 663 transitions, 10427 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 18:09:58,933 INFO L231 Difference]: Finished difference. Result has 510 places, 638 transitions, 9189 flow [2024-06-21 18:09:58,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8889, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9189, PETRI_PLACES=510, PETRI_TRANSITIONS=638} [2024-06-21 18:09:58,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-21 18:09:58,933 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 638 transitions, 9189 flow [2024-06-21 18:09:58,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:58,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:09:58,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:09:58,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 18:09:58,933 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:09:58,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:09:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash -31525063, now seen corresponding path program 3 times [2024-06-21 18:09:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:09:58,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052237094] [2024-06-21 18:09:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:09:58,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:09:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:09:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:59,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052237094] [2024-06-21 18:09:59,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052237094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:59,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:59,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:09:59,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044886101] [2024-06-21 18:09:59,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:59,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:09:59,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:09:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:09:59,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:09:59,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 638 transitions, 9189 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:59,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:59,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:09:59,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:10:02,033 INFO L124 PetriNetUnfolderBase]: 4338/7212 cut-off events. [2024-06-21 18:10:02,033 INFO L125 PetriNetUnfolderBase]: For 1407293/1407293 co-relation queries the response was YES. [2024-06-21 18:10:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72345 conditions, 7212 events. 4338/7212 cut-off events. For 1407293/1407293 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 49466 event pairs, 807 based on Foata normal form. 1/7209 useless extension candidates. Maximal degree in co-relation 72106. Up to 6431 conditions per place. [2024-06-21 18:10:02,160 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 581 selfloop transitions, 79 changer transitions 0/667 dead transitions. [2024-06-21 18:10:02,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 667 transitions, 11199 flow [2024-06-21 18:10:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:10:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:10:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:10:02,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-21 18:10:02,161 INFO L175 Difference]: Start difference. First operand has 510 places, 638 transitions, 9189 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:10:02,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 667 transitions, 11199 flow [2024-06-21 18:10:13,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 667 transitions, 10915 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 18:10:13,260 INFO L231 Difference]: Finished difference. Result has 512 places, 644 transitions, 9391 flow [2024-06-21 18:10:13,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8905, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9391, PETRI_PLACES=512, PETRI_TRANSITIONS=644} [2024-06-21 18:10:13,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-21 18:10:13,261 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 644 transitions, 9391 flow [2024-06-21 18:10:13,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:13,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:10:13,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:10:13,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 18:10:13,261 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:10:13,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:10:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2145493593, now seen corresponding path program 1 times [2024-06-21 18:10:13,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:10:13,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692387420] [2024-06-21 18:10:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:10:13,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:10:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:10:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:10:13,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:10:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692387420] [2024-06-21 18:10:13,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692387420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:10:13,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:10:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:10:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002845689] [2024-06-21 18:10:13,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:10:13,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:10:13,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:10:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:10:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:10:14,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:10:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 644 transitions, 9391 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:10:14,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:10:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:10:16,292 INFO L124 PetriNetUnfolderBase]: 4343/7226 cut-off events. [2024-06-21 18:10:16,292 INFO L125 PetriNetUnfolderBase]: For 1430686/1430686 co-relation queries the response was YES. [2024-06-21 18:10:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72943 conditions, 7226 events. 4343/7226 cut-off events. For 1430686/1430686 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49523 event pairs, 804 based on Foata normal form. 1/7219 useless extension candidates. Maximal degree in co-relation 72703. Up to 6531 conditions per place. [2024-06-21 18:10:16,422 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 54 changer transitions 0/672 dead transitions. [2024-06-21 18:10:16,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 672 transitions, 10979 flow [2024-06-21 18:10:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:10:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:10:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:10:16,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:10:16,423 INFO L175 Difference]: Start difference. First operand has 512 places, 644 transitions, 9391 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:10:16,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 672 transitions, 10979 flow [2024-06-21 18:10:26,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 672 transitions, 10711 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-21 18:10:26,323 INFO L231 Difference]: Finished difference. Result has 518 places, 655 transitions, 9477 flow [2024-06-21 18:10:26,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9123, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9477, PETRI_PLACES=518, PETRI_TRANSITIONS=655} [2024-06-21 18:10:26,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-21 18:10:26,323 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 655 transitions, 9477 flow [2024-06-21 18:10:26,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:26,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:10:26,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:10:26,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 18:10:26,323 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:10:26,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:10:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash 903225095, now seen corresponding path program 2 times [2024-06-21 18:10:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:10:26,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321127210] [2024-06-21 18:10:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:10:26,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:10:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:10:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:10:27,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:10:27,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321127210] [2024-06-21 18:10:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321127210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:10:27,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:10:27,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:10:27,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989290996] [2024-06-21 18:10:27,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:10:27,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:10:27,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:10:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:10:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:10:27,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:10:27,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 655 transitions, 9477 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:27,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:10:27,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:10:27,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:10:29,420 INFO L124 PetriNetUnfolderBase]: 4356/7252 cut-off events. [2024-06-21 18:10:29,420 INFO L125 PetriNetUnfolderBase]: For 1474451/1474451 co-relation queries the response was YES. [2024-06-21 18:10:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73928 conditions, 7252 events. 4356/7252 cut-off events. For 1474451/1474451 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49823 event pairs, 815 based on Foata normal form. 1/7242 useless extension candidates. Maximal degree in co-relation 73684. Up to 6477 conditions per place. [2024-06-21 18:10:29,555 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 596 selfloop transitions, 90 changer transitions 0/693 dead transitions. [2024-06-21 18:10:29,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 693 transitions, 11583 flow [2024-06-21 18:10:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:10:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:10:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:10:29,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:10:29,556 INFO L175 Difference]: Start difference. First operand has 518 places, 655 transitions, 9477 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:10:29,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 693 transitions, 11583 flow [2024-06-21 18:10:41,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 693 transitions, 11343 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-21 18:10:41,095 INFO L231 Difference]: Finished difference. Result has 524 places, 678 transitions, 9895 flow [2024-06-21 18:10:41,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9245, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9895, PETRI_PLACES=524, PETRI_TRANSITIONS=678} [2024-06-21 18:10:41,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-21 18:10:41,096 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 678 transitions, 9895 flow [2024-06-21 18:10:41,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:41,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:10:41,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:10:41,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 18:10:41,096 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:10:41,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:10:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash -125931689, now seen corresponding path program 4 times [2024-06-21 18:10:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:10:41,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031293897] [2024-06-21 18:10:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:10:41,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:10:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:10:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:10:41,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:10:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031293897] [2024-06-21 18:10:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031293897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:10:41,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:10:41,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:10:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729704553] [2024-06-21 18:10:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:10:41,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:10:41,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:10:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:10:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:10:41,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:10:41,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 678 transitions, 9895 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:41,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:10:41,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:10:41,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:10:44,388 INFO L124 PetriNetUnfolderBase]: 4353/7258 cut-off events. [2024-06-21 18:10:44,388 INFO L125 PetriNetUnfolderBase]: For 1467298/1467298 co-relation queries the response was YES. [2024-06-21 18:10:44,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74278 conditions, 7258 events. 4353/7258 cut-off events. For 1467298/1467298 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49885 event pairs, 781 based on Foata normal form. 1/7257 useless extension candidates. Maximal degree in co-relation 74031. Up to 6595 conditions per place. [2024-06-21 18:10:44,526 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 659 selfloop transitions, 40 changer transitions 0/706 dead transitions. [2024-06-21 18:10:44,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 706 transitions, 11378 flow [2024-06-21 18:10:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:10:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:10:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:10:44,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 18:10:44,527 INFO L175 Difference]: Start difference. First operand has 524 places, 678 transitions, 9895 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:10:44,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 706 transitions, 11378 flow [2024-06-21 18:10:54,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 706 transitions, 11064 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-06-21 18:10:54,425 INFO L231 Difference]: Finished difference. Result has 530 places, 678 transitions, 9667 flow [2024-06-21 18:10:54,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9581, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9667, PETRI_PLACES=530, PETRI_TRANSITIONS=678} [2024-06-21 18:10:54,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-21 18:10:54,426 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 678 transitions, 9667 flow [2024-06-21 18:10:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:10:54,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:10:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 18:10:54,426 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:10:54,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:10:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 620746231, now seen corresponding path program 3 times [2024-06-21 18:10:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:10:54,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135487443] [2024-06-21 18:10:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:10:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:10:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:10:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:10:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:10:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135487443] [2024-06-21 18:10:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135487443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:10:55,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:10:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:10:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330019569] [2024-06-21 18:10:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:10:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:10:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:10:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:10:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:10:55,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:10:55,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 678 transitions, 9667 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:10:55,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:10:55,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:10:55,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:10:57,611 INFO L124 PetriNetUnfolderBase]: 4358/7257 cut-off events. [2024-06-21 18:10:57,611 INFO L125 PetriNetUnfolderBase]: For 1494861/1494861 co-relation queries the response was YES. [2024-06-21 18:10:57,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74004 conditions, 7257 events. 4358/7257 cut-off events. For 1494861/1494861 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 49906 event pairs, 815 based on Foata normal form. 1/7247 useless extension candidates. Maximal degree in co-relation 73755. Up to 6497 conditions per place. [2024-06-21 18:10:57,759 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 612 selfloop transitions, 79 changer transitions 0/698 dead transitions. [2024-06-21 18:10:57,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 698 transitions, 11210 flow [2024-06-21 18:10:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:10:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:10:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:10:57,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 18:10:57,760 INFO L175 Difference]: Start difference. First operand has 530 places, 678 transitions, 9667 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:10:57,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 698 transitions, 11210 flow [2024-06-21 18:11:09,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 698 transitions, 11081 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:11:09,963 INFO L231 Difference]: Finished difference. Result has 530 places, 684 transitions, 9831 flow [2024-06-21 18:11:09,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9538, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9831, PETRI_PLACES=530, PETRI_TRANSITIONS=684} [2024-06-21 18:11:09,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-21 18:11:09,963 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 684 transitions, 9831 flow [2024-06-21 18:11:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:09,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:11:09,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:11:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 18:11:09,964 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:11:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:11:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 967221643, now seen corresponding path program 4 times [2024-06-21 18:11:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:11:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83634825] [2024-06-21 18:11:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:11:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:11:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:11:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:11:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:11:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83634825] [2024-06-21 18:11:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83634825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:11:10,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:11:10,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:11:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840610146] [2024-06-21 18:11:10,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:11:10,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:11:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:11:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:11:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:11:10,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:11:10,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 684 transitions, 9831 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:10,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:11:10,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:11:10,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:11:13,019 INFO L124 PetriNetUnfolderBase]: 4363/7260 cut-off events. [2024-06-21 18:11:13,019 INFO L125 PetriNetUnfolderBase]: For 1512061/1512061 co-relation queries the response was YES. [2024-06-21 18:11:13,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74264 conditions, 7260 events. 4363/7260 cut-off events. For 1512061/1512061 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 49952 event pairs, 814 based on Foata normal form. 1/7250 useless extension candidates. Maximal degree in co-relation 74014. Up to 6549 conditions per place. [2024-06-21 18:11:13,148 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 628 selfloop transitions, 65 changer transitions 0/700 dead transitions. [2024-06-21 18:11:13,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 700 transitions, 11343 flow [2024-06-21 18:11:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:11:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:11:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:11:13,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 18:11:13,150 INFO L175 Difference]: Start difference. First operand has 530 places, 684 transitions, 9831 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:11:13,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 700 transitions, 11343 flow [2024-06-21 18:11:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 700 transitions, 11142 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 18:11:23,921 INFO L231 Difference]: Finished difference. Result has 534 places, 687 transitions, 9867 flow [2024-06-21 18:11:23,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9630, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9867, PETRI_PLACES=534, PETRI_TRANSITIONS=687} [2024-06-21 18:11:23,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-21 18:11:23,922 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 687 transitions, 9867 flow [2024-06-21 18:11:23,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:23,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:11:23,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:11:23,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 18:11:23,922 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:11:23,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:11:23,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1934824121, now seen corresponding path program 5 times [2024-06-21 18:11:23,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:11:23,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554733021] [2024-06-21 18:11:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:11:23,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:11:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:11:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:11:24,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:11:24,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554733021] [2024-06-21 18:11:24,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554733021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:11:24,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:11:24,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:11:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90647015] [2024-06-21 18:11:24,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:11:24,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:11:24,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:11:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:11:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:11:24,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:11:24,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 687 transitions, 9867 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:24,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:11:24,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:11:24,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:11:27,036 INFO L124 PetriNetUnfolderBase]: 4368/7273 cut-off events. [2024-06-21 18:11:27,036 INFO L125 PetriNetUnfolderBase]: For 1528898/1528898 co-relation queries the response was YES. [2024-06-21 18:11:27,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74382 conditions, 7273 events. 4368/7273 cut-off events. For 1528898/1528898 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 49994 event pairs, 810 based on Foata normal form. 1/7263 useless extension candidates. Maximal degree in co-relation 74131. Up to 6457 conditions per place. [2024-06-21 18:11:27,170 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 596 selfloop transitions, 109 changer transitions 0/712 dead transitions. [2024-06-21 18:11:27,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 712 transitions, 11539 flow [2024-06-21 18:11:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:11:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:11:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:11:27,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 18:11:27,171 INFO L175 Difference]: Start difference. First operand has 534 places, 687 transitions, 9867 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:11:27,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 712 transitions, 11539 flow [2024-06-21 18:11:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 712 transitions, 11354 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 18:11:37,709 INFO L231 Difference]: Finished difference. Result has 540 places, 698 transitions, 10197 flow [2024-06-21 18:11:37,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10197, PETRI_PLACES=540, PETRI_TRANSITIONS=698} [2024-06-21 18:11:37,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 497 predicate places. [2024-06-21 18:11:37,709 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 698 transitions, 10197 flow [2024-06-21 18:11:37,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:37,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:11:37,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:11:37,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 18:11:37,710 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:11:37,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:11:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1943098331, now seen corresponding path program 6 times [2024-06-21 18:11:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:11:37,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822882222] [2024-06-21 18:11:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:11:37,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:11:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:11:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:11:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:11:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822882222] [2024-06-21 18:11:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822882222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:11:38,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:11:38,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:11:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571502749] [2024-06-21 18:11:38,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:11:38,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:11:38,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:11:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:11:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:11:38,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:11:38,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 698 transitions, 10197 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:38,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:11:38,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:11:38,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:11:40,943 INFO L124 PetriNetUnfolderBase]: 4373/7282 cut-off events. [2024-06-21 18:11:40,943 INFO L125 PetriNetUnfolderBase]: For 1551066/1551066 co-relation queries the response was YES. [2024-06-21 18:11:41,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75257 conditions, 7282 events. 4373/7282 cut-off events. For 1551066/1551066 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 50053 event pairs, 810 based on Foata normal form. 1/7272 useless extension candidates. Maximal degree in co-relation 75003. Up to 6464 conditions per place. [2024-06-21 18:11:41,096 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 591 selfloop transitions, 118 changer transitions 0/716 dead transitions. [2024-06-21 18:11:41,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 716 transitions, 11800 flow [2024-06-21 18:11:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:11:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:11:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:11:41,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 18:11:41,097 INFO L175 Difference]: Start difference. First operand has 540 places, 698 transitions, 10197 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:11:41,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 716 transitions, 11800 flow [2024-06-21 18:11:51,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 716 transitions, 11534 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 18:11:51,478 INFO L231 Difference]: Finished difference. Result has 545 places, 702 transitions, 10331 flow [2024-06-21 18:11:51,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9961, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10331, PETRI_PLACES=545, PETRI_TRANSITIONS=702} [2024-06-21 18:11:51,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-21 18:11:51,478 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 702 transitions, 10331 flow [2024-06-21 18:11:51,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:51,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:11:51,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:11:51,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 18:11:51,479 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:11:51,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:11:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1998697079, now seen corresponding path program 7 times [2024-06-21 18:11:51,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:11:51,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793776414] [2024-06-21 18:11:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:11:51,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:11:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:11:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:11:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:11:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793776414] [2024-06-21 18:11:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793776414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:11:52,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:11:52,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:11:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059329327] [2024-06-21 18:11:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:11:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:11:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:11:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:11:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:11:52,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:11:52,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 702 transitions, 10331 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:11:52,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:11:52,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:11:52,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:11:54,776 INFO L124 PetriNetUnfolderBase]: 4383/7302 cut-off events. [2024-06-21 18:11:54,776 INFO L125 PetriNetUnfolderBase]: For 1570396/1570396 co-relation queries the response was YES. [2024-06-21 18:11:54,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76121 conditions, 7302 events. 4383/7302 cut-off events. For 1570396/1570396 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 50279 event pairs, 810 based on Foata normal form. 1/7292 useless extension candidates. Maximal degree in co-relation 75865. Up to 6440 conditions per place. [2024-06-21 18:11:54,905 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 572 selfloop transitions, 143 changer transitions 0/722 dead transitions. [2024-06-21 18:11:54,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 722 transitions, 11932 flow [2024-06-21 18:11:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:11:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:11:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:11:54,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 18:11:54,906 INFO L175 Difference]: Start difference. First operand has 545 places, 702 transitions, 10331 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:11:54,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 722 transitions, 11932 flow [2024-06-21 18:12:05,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 722 transitions, 11665 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 18:12:05,937 INFO L231 Difference]: Finished difference. Result has 550 places, 708 transitions, 10543 flow [2024-06-21 18:12:05,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10543, PETRI_PLACES=550, PETRI_TRANSITIONS=708} [2024-06-21 18:12:05,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 507 predicate places. [2024-06-21 18:12:05,944 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 708 transitions, 10543 flow [2024-06-21 18:12:05,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:12:05,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:12:05,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:12:05,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 18:12:05,944 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:12:05,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:12:05,945 INFO L85 PathProgramCache]: Analyzing trace with hash 185440637, now seen corresponding path program 8 times [2024-06-21 18:12:05,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:12:05,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105067739] [2024-06-21 18:12:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:12:05,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:12:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:12:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:12:06,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:12:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105067739] [2024-06-21 18:12:06,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105067739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:12:06,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:12:06,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:12:06,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934990659] [2024-06-21 18:12:06,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:12:06,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:12:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:12:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:12:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:12:06,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:12:06,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 708 transitions, 10543 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:12:06,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:12:06,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:12:06,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:12:09,073 INFO L124 PetriNetUnfolderBase]: 4380/7296 cut-off events. [2024-06-21 18:12:09,073 INFO L125 PetriNetUnfolderBase]: For 1577826/1577826 co-relation queries the response was YES. [2024-06-21 18:12:09,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76597 conditions, 7296 events. 4380/7296 cut-off events. For 1577826/1577826 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 50270 event pairs, 810 based on Foata normal form. 1/7286 useless extension candidates. Maximal degree in co-relation 76339. Up to 6528 conditions per place. [2024-06-21 18:12:09,205 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 631 selfloop transitions, 84 changer transitions 0/722 dead transitions. [2024-06-21 18:12:09,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 722 transitions, 12011 flow [2024-06-21 18:12:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:12:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:12:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:12:09,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:12:09,206 INFO L175 Difference]: Start difference. First operand has 550 places, 708 transitions, 10543 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:12:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 722 transitions, 12011 flow [2024-06-21 18:12:19,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 722 transitions, 11627 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 18:12:19,668 INFO L231 Difference]: Finished difference. Result has 553 places, 708 transitions, 10333 flow [2024-06-21 18:12:19,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10159, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10333, PETRI_PLACES=553, PETRI_TRANSITIONS=708} [2024-06-21 18:12:19,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 510 predicate places. [2024-06-21 18:12:19,668 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 708 transitions, 10333 flow [2024-06-21 18:12:19,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:12:19,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:12:19,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:12:19,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 18:12:19,668 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:12:19,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:12:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 828884985, now seen corresponding path program 9 times [2024-06-21 18:12:19,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:12:19,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076982718] [2024-06-21 18:12:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:12:19,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:12:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:12:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:12:20,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:12:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076982718] [2024-06-21 18:12:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076982718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:12:20,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:12:20,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:12:20,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662530324] [2024-06-21 18:12:20,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:12:20,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:12:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:12:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:12:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:12:20,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:12:20,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 708 transitions, 10333 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:12:20,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:12:20,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:12:20,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:12:22,808 INFO L124 PetriNetUnfolderBase]: 4401/7328 cut-off events. [2024-06-21 18:12:22,808 INFO L125 PetriNetUnfolderBase]: For 1622636/1622636 co-relation queries the response was YES. [2024-06-21 18:12:22,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77286 conditions, 7328 events. 4401/7328 cut-off events. For 1622636/1622636 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 50591 event pairs, 830 based on Foata normal form. 1/7315 useless extension candidates. Maximal degree in co-relation 77027. Up to 6298 conditions per place. [2024-06-21 18:12:22,940 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 543 selfloop transitions, 207 changer transitions 0/757 dead transitions. [2024-06-21 18:12:22,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 757 transitions, 13121 flow [2024-06-21 18:12:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:12:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:12:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:12:22,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:12:22,941 INFO L175 Difference]: Start difference. First operand has 553 places, 708 transitions, 10333 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:12:22,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 757 transitions, 13121 flow [2024-06-21 18:12:35,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 757 transitions, 12845 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 18:12:35,092 INFO L231 Difference]: Finished difference. Result has 555 places, 744 transitions, 11301 flow [2024-06-21 18:12:35,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10057, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11301, PETRI_PLACES=555, PETRI_TRANSITIONS=744} [2024-06-21 18:12:35,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 512 predicate places. [2024-06-21 18:12:35,093 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 744 transitions, 11301 flow [2024-06-21 18:12:35,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:12:35,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:12:35,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:12:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 18:12:35,093 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:12:35,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:12:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash 824123385, now seen corresponding path program 10 times [2024-06-21 18:12:35,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:12:35,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905807435] [2024-06-21 18:12:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:12:35,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:12:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:12:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:12:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:12:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905807435] [2024-06-21 18:12:35,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905807435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:12:35,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:12:35,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:12:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399689552] [2024-06-21 18:12:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:12:35,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:12:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:12:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:12:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:12:35,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:12:35,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 744 transitions, 11301 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:12:35,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:12:35,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:12:35,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:12:38,387 INFO L124 PetriNetUnfolderBase]: 4411/7353 cut-off events. [2024-06-21 18:12:38,387 INFO L125 PetriNetUnfolderBase]: For 1649344/1649344 co-relation queries the response was YES. [2024-06-21 18:12:38,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78516 conditions, 7353 events. 4411/7353 cut-off events. For 1649344/1649344 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 50786 event pairs, 802 based on Foata normal form. 1/7343 useless extension candidates. Maximal degree in co-relation 78255. Up to 6629 conditions per place. [2024-06-21 18:12:38,525 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 672 selfloop transitions, 82 changer transitions 0/761 dead transitions. [2024-06-21 18:12:38,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 761 transitions, 12994 flow [2024-06-21 18:12:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:12:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:12:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:12:38,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 18:12:38,526 INFO L175 Difference]: Start difference. First operand has 555 places, 744 transitions, 11301 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:12:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 761 transitions, 12994 flow Killed by 15